blob: 966eddce16093a05aae6c44b812654dbd7365151 [file] [log] [blame]
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001#include "builtin.h"
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02002#include "perf.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +02003
4#include "util/util.h"
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02005#include "util/evlist.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +02006#include "util/cache.h"
Arnaldo Carvalho de Meloe3f42602011-11-16 17:02:54 -02007#include "util/evsel.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +02008#include "util/symbol.h"
9#include "util/thread.h"
10#include "util/header.h"
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -020011#include "util/session.h"
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -020012#include "util/tool.h"
Yann Droneaud57480d22014-06-30 22:28:47 +020013#include "util/cloexec.h"
Jiri Olsaa151a372016-04-12 15:29:29 +020014#include "util/thread_map.h"
Jiri Olsa8cd91192016-04-12 15:29:27 +020015#include "util/color.h"
David Ahern49394a22016-11-16 15:06:29 +090016#include "util/stat.h"
David Ahern6c973c92016-11-16 15:06:32 +090017#include "util/callchain.h"
David Ahern853b7402016-11-29 10:15:44 -070018#include "util/time-utils.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +020019
Josh Poimboeuf4b6ab942015-12-15 09:39:39 -060020#include <subcmd/parse-options.h>
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020021#include "util/trace-event.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +020022
Ingo Molnar0a02ad92009-09-11 12:12:54 +020023#include "util/debug.h"
24
David Ahern49394a22016-11-16 15:06:29 +090025#include <linux/log2.h>
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020026#include <sys/prctl.h>
Markus Trippelsdorf7b78f132012-04-04 10:45:27 +020027#include <sys/resource.h>
Ingo Molnar0a02ad92009-09-11 12:12:54 +020028
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020029#include <semaphore.h>
30#include <pthread.h>
31#include <math.h>
Yunlong Songcb06ac22015-03-31 21:46:30 +080032#include <api/fs/fs.h>
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -030033#include <linux/time64.h>
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +020034
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020035#define PR_SET_NAME 15 /* Set process name */
36#define MAX_CPUS 4096
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020037#define COMM_LEN 20
38#define SYM_LEN 129
Yunlong Songa35e27d2015-03-31 21:46:29 +080039#define MAX_PID 1024000
Ingo Molnarec156762009-09-11 12:12:54 +020040
mingo39aeb522009-09-14 20:04:48 +020041struct sched_atom;
Ingo Molnarec156762009-09-11 12:12:54 +020042
43struct task_desc {
44 unsigned long nr;
45 unsigned long pid;
46 char comm[COMM_LEN];
47
48 unsigned long nr_events;
49 unsigned long curr_event;
mingo39aeb522009-09-14 20:04:48 +020050 struct sched_atom **atoms;
Ingo Molnarec156762009-09-11 12:12:54 +020051
52 pthread_t thread;
53 sem_t sleep_sem;
54
55 sem_t ready_for_work;
56 sem_t work_done_sem;
57
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020058 u64 cpu_usage;
Ingo Molnarec156762009-09-11 12:12:54 +020059};
60
61enum sched_event_type {
62 SCHED_EVENT_RUN,
63 SCHED_EVENT_SLEEP,
64 SCHED_EVENT_WAKEUP,
Mike Galbraith55ffb7a2009-10-10 14:46:04 +020065 SCHED_EVENT_MIGRATION,
Ingo Molnarec156762009-09-11 12:12:54 +020066};
67
mingo39aeb522009-09-14 20:04:48 +020068struct sched_atom {
Ingo Molnarec156762009-09-11 12:12:54 +020069 enum sched_event_type type;
Arnaldo Carvalho de Meloeed05fe2010-04-05 12:53:45 -030070 int specific_wait;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020071 u64 timestamp;
72 u64 duration;
Ingo Molnarec156762009-09-11 12:12:54 +020073 unsigned long nr;
Ingo Molnarec156762009-09-11 12:12:54 +020074 sem_t *wait_sem;
75 struct task_desc *wakee;
76};
77
Dongshenge936e8e2014-05-05 16:05:54 +090078#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP"
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020079
80enum thread_state {
81 THREAD_SLEEPING = 0,
82 THREAD_WAIT_CPU,
83 THREAD_SCHED_IN,
84 THREAD_IGNORE
85};
86
87struct work_atom {
88 struct list_head list;
89 enum thread_state state;
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +020090 u64 sched_out_time;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020091 u64 wake_up_time;
92 u64 sched_in_time;
93 u64 runtime;
94};
95
mingo39aeb522009-09-14 20:04:48 +020096struct work_atoms {
97 struct list_head work_list;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020098 struct thread *thread;
99 struct rb_node node;
100 u64 max_lat;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +0100101 u64 max_lat_at;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200102 u64 total_lat;
103 u64 nb_atoms;
104 u64 total_runtime;
Josef Bacik2f80dd42015-05-22 09:18:40 -0400105 int num_merged;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200106};
107
mingo39aeb522009-09-14 20:04:48 +0200108typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200109
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300110struct perf_sched;
111
112struct trace_sched_handler {
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300113 int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel,
114 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300115
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300116 int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel,
117 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300118
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300119 int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel,
120 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300121
David Aherncb627502013-08-07 22:50:47 -0400122 /* PERF_RECORD_FORK event, not sched_process_fork tracepoint */
123 int (*fork_event)(struct perf_sched *sched, union perf_event *event,
124 struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300125
126 int (*migrate_task_event)(struct perf_sched *sched,
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300127 struct perf_evsel *evsel,
128 struct perf_sample *sample,
129 struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300130};
131
Jiri Olsaa151a372016-04-12 15:29:29 +0200132#define COLOR_PIDS PERF_COLOR_BLUE
Jiri Olsacf294f22016-04-12 15:29:30 +0200133#define COLOR_CPUS PERF_COLOR_BG_RED
Jiri Olsaa151a372016-04-12 15:29:29 +0200134
Jiri Olsa99623c62016-04-12 15:29:26 +0200135struct perf_sched_map {
136 DECLARE_BITMAP(comp_cpus_mask, MAX_CPUS);
137 int *comp_cpus;
138 bool comp;
Jiri Olsaa151a372016-04-12 15:29:29 +0200139 struct thread_map *color_pids;
140 const char *color_pids_str;
Jiri Olsacf294f22016-04-12 15:29:30 +0200141 struct cpu_map *color_cpus;
142 const char *color_cpus_str;
Jiri Olsa73643bb2016-04-12 15:29:31 +0200143 struct cpu_map *cpus;
144 const char *cpus_str;
Jiri Olsa99623c62016-04-12 15:29:26 +0200145};
146
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300147struct perf_sched {
148 struct perf_tool tool;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300149 const char *sort_order;
150 unsigned long nr_tasks;
Yunlong Songcb06ac22015-03-31 21:46:30 +0800151 struct task_desc **pid_to_task;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300152 struct task_desc **tasks;
153 const struct trace_sched_handler *tp_handler;
154 pthread_mutex_t start_work_mutex;
155 pthread_mutex_t work_done_wait_mutex;
156 int profile_cpu;
157/*
158 * Track the current task - that way we can know whether there's any
159 * weird events, such as a task being switched away that is not current.
160 */
161 int max_cpu;
162 u32 curr_pid[MAX_CPUS];
163 struct thread *curr_thread[MAX_CPUS];
164 char next_shortname1;
165 char next_shortname2;
166 unsigned int replay_repeat;
167 unsigned long nr_run_events;
168 unsigned long nr_sleep_events;
169 unsigned long nr_wakeup_events;
170 unsigned long nr_sleep_corrections;
171 unsigned long nr_run_events_optimized;
172 unsigned long targetless_wakeups;
173 unsigned long multitarget_wakeups;
174 unsigned long nr_runs;
175 unsigned long nr_timestamps;
176 unsigned long nr_unordered_timestamps;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300177 unsigned long nr_context_switch_bugs;
178 unsigned long nr_events;
179 unsigned long nr_lost_chunks;
180 unsigned long nr_lost_events;
181 u64 run_measurement_overhead;
182 u64 sleep_measurement_overhead;
183 u64 start_time;
184 u64 cpu_usage;
185 u64 runavg_cpu_usage;
186 u64 parent_cpu_usage;
187 u64 runavg_parent_cpu_usage;
188 u64 sum_runtime;
189 u64 sum_fluct;
190 u64 run_avg;
191 u64 all_runtime;
192 u64 all_count;
193 u64 cpu_last_switched[MAX_CPUS];
Josef Bacik2f80dd42015-05-22 09:18:40 -0400194 struct rb_root atom_root, sorted_atom_root, merged_atom_root;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300195 struct list_head sort_list, cmp_pid;
Yunlong Song939cda52015-03-31 21:46:34 +0800196 bool force;
Josef Bacik2f80dd42015-05-22 09:18:40 -0400197 bool skip_merge;
Jiri Olsa99623c62016-04-12 15:29:26 +0200198 struct perf_sched_map map;
David Ahern52df1382016-11-16 15:06:30 +0900199
200 /* options for timehist command */
201 bool summary;
202 bool summary_only;
David Ahern6c973c92016-11-16 15:06:32 +0900203 bool show_callchain;
204 unsigned int max_stack;
David Aherna407b062016-11-16 15:06:33 +0900205 bool show_cpu_visual;
David Ahernfc1469f2016-11-16 15:06:31 +0900206 bool show_wakeups;
David Ahern350f54f2016-11-25 09:28:41 -0700207 bool show_migrations;
David Ahern52df1382016-11-16 15:06:30 +0900208 u64 skipped_samples;
David Ahern853b7402016-11-29 10:15:44 -0700209 const char *time_str;
210 struct perf_time_interval ptime;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300211};
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200212
David Ahern49394a22016-11-16 15:06:29 +0900213/* per thread run time data */
214struct thread_runtime {
215 u64 last_time; /* time of previous sched in/out event */
216 u64 dt_run; /* run time */
217 u64 dt_wait; /* time between CPU access (off cpu) */
218 u64 dt_delay; /* time between wakeup and sched-in */
219 u64 ready_to_run; /* time of wakeup */
220
221 struct stats run_stats;
222 u64 total_run_time;
David Ahern350f54f2016-11-25 09:28:41 -0700223
224 u64 migrations;
David Ahern49394a22016-11-16 15:06:29 +0900225};
226
227/* per event run time data */
228struct evsel_runtime {
229 u64 *last_time; /* time this event was last seen per cpu */
230 u32 ncpu; /* highest cpu slot allocated */
231};
232
233/* track idle times per cpu */
234static struct thread **idle_threads;
235static int idle_max_cpu;
236static char idle_comm[] = "<idle>";
237
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200238static u64 get_nsecs(void)
239{
240 struct timespec ts;
241
242 clock_gettime(CLOCK_MONOTONIC, &ts);
243
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300244 return ts.tv_sec * NSEC_PER_SEC + ts.tv_nsec;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200245}
246
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300247static void burn_nsecs(struct perf_sched *sched, u64 nsecs)
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200248{
249 u64 T0 = get_nsecs(), T1;
250
251 do {
252 T1 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300253 } while (T1 + sched->run_measurement_overhead < T0 + nsecs);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200254}
255
256static void sleep_nsecs(u64 nsecs)
257{
258 struct timespec ts;
259
260 ts.tv_nsec = nsecs % 999999999;
261 ts.tv_sec = nsecs / 999999999;
262
263 nanosleep(&ts, NULL);
264}
265
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300266static void calibrate_run_measurement_overhead(struct perf_sched *sched)
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200267{
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300268 u64 T0, T1, delta, min_delta = NSEC_PER_SEC;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200269 int i;
270
271 for (i = 0; i < 10; i++) {
272 T0 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300273 burn_nsecs(sched, 0);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200274 T1 = get_nsecs();
275 delta = T1-T0;
276 min_delta = min(min_delta, delta);
277 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300278 sched->run_measurement_overhead = min_delta;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200279
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200280 printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200281}
282
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300283static void calibrate_sleep_measurement_overhead(struct perf_sched *sched)
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200284{
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300285 u64 T0, T1, delta, min_delta = NSEC_PER_SEC;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200286 int i;
287
288 for (i = 0; i < 10; i++) {
289 T0 = get_nsecs();
290 sleep_nsecs(10000);
291 T1 = get_nsecs();
292 delta = T1-T0;
293 min_delta = min(min_delta, delta);
294 }
295 min_delta -= 10000;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300296 sched->sleep_measurement_overhead = min_delta;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200297
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200298 printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200299}
300
mingo39aeb522009-09-14 20:04:48 +0200301static struct sched_atom *
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200302get_new_event(struct task_desc *task, u64 timestamp)
Ingo Molnarec156762009-09-11 12:12:54 +0200303{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200304 struct sched_atom *event = zalloc(sizeof(*event));
Ingo Molnarec156762009-09-11 12:12:54 +0200305 unsigned long idx = task->nr_events;
306 size_t size;
307
308 event->timestamp = timestamp;
309 event->nr = idx;
310
311 task->nr_events++;
mingo39aeb522009-09-14 20:04:48 +0200312 size = sizeof(struct sched_atom *) * task->nr_events;
313 task->atoms = realloc(task->atoms, size);
314 BUG_ON(!task->atoms);
Ingo Molnarec156762009-09-11 12:12:54 +0200315
mingo39aeb522009-09-14 20:04:48 +0200316 task->atoms[idx] = event;
Ingo Molnarec156762009-09-11 12:12:54 +0200317
318 return event;
319}
320
mingo39aeb522009-09-14 20:04:48 +0200321static struct sched_atom *last_event(struct task_desc *task)
Ingo Molnarec156762009-09-11 12:12:54 +0200322{
323 if (!task->nr_events)
324 return NULL;
325
mingo39aeb522009-09-14 20:04:48 +0200326 return task->atoms[task->nr_events - 1];
Ingo Molnarec156762009-09-11 12:12:54 +0200327}
328
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300329static void add_sched_event_run(struct perf_sched *sched, struct task_desc *task,
330 u64 timestamp, u64 duration)
Ingo Molnarec156762009-09-11 12:12:54 +0200331{
mingo39aeb522009-09-14 20:04:48 +0200332 struct sched_atom *event, *curr_event = last_event(task);
Ingo Molnarec156762009-09-11 12:12:54 +0200333
334 /*
Ingo Molnarfbf94822009-09-11 12:12:54 +0200335 * optimize an existing RUN event by merging this one
336 * to it:
337 */
Ingo Molnarec156762009-09-11 12:12:54 +0200338 if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300339 sched->nr_run_events_optimized++;
Ingo Molnarec156762009-09-11 12:12:54 +0200340 curr_event->duration += duration;
341 return;
342 }
343
344 event = get_new_event(task, timestamp);
345
346 event->type = SCHED_EVENT_RUN;
347 event->duration = duration;
348
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300349 sched->nr_run_events++;
Ingo Molnarec156762009-09-11 12:12:54 +0200350}
351
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300352static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *task,
353 u64 timestamp, struct task_desc *wakee)
Ingo Molnarec156762009-09-11 12:12:54 +0200354{
mingo39aeb522009-09-14 20:04:48 +0200355 struct sched_atom *event, *wakee_event;
Ingo Molnarec156762009-09-11 12:12:54 +0200356
357 event = get_new_event(task, timestamp);
358 event->type = SCHED_EVENT_WAKEUP;
359 event->wakee = wakee;
360
361 wakee_event = last_event(wakee);
362 if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300363 sched->targetless_wakeups++;
Ingo Molnarec156762009-09-11 12:12:54 +0200364 return;
365 }
366 if (wakee_event->wait_sem) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300367 sched->multitarget_wakeups++;
Ingo Molnarec156762009-09-11 12:12:54 +0200368 return;
369 }
370
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200371 wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
Ingo Molnarec156762009-09-11 12:12:54 +0200372 sem_init(wakee_event->wait_sem, 0, 0);
373 wakee_event->specific_wait = 1;
374 event->wait_sem = wakee_event->wait_sem;
375
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300376 sched->nr_wakeup_events++;
Ingo Molnarec156762009-09-11 12:12:54 +0200377}
378
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300379static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task,
380 u64 timestamp, u64 task_state __maybe_unused)
Ingo Molnarec156762009-09-11 12:12:54 +0200381{
mingo39aeb522009-09-14 20:04:48 +0200382 struct sched_atom *event = get_new_event(task, timestamp);
Ingo Molnarec156762009-09-11 12:12:54 +0200383
384 event->type = SCHED_EVENT_SLEEP;
385
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300386 sched->nr_sleep_events++;
Ingo Molnarec156762009-09-11 12:12:54 +0200387}
388
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300389static struct task_desc *register_pid(struct perf_sched *sched,
390 unsigned long pid, const char *comm)
Ingo Molnarec156762009-09-11 12:12:54 +0200391{
392 struct task_desc *task;
Yunlong Songcb06ac22015-03-31 21:46:30 +0800393 static int pid_max;
Ingo Molnarec156762009-09-11 12:12:54 +0200394
Yunlong Songcb06ac22015-03-31 21:46:30 +0800395 if (sched->pid_to_task == NULL) {
396 if (sysctl__read_int("kernel/pid_max", &pid_max) < 0)
397 pid_max = MAX_PID;
398 BUG_ON((sched->pid_to_task = calloc(pid_max, sizeof(struct task_desc *))) == NULL);
399 }
Yunlong Song3a423a52015-03-31 21:46:31 +0800400 if (pid >= (unsigned long)pid_max) {
401 BUG_ON((sched->pid_to_task = realloc(sched->pid_to_task, (pid + 1) *
402 sizeof(struct task_desc *))) == NULL);
403 while (pid >= (unsigned long)pid_max)
404 sched->pid_to_task[pid_max++] = NULL;
405 }
Ingo Molnarec156762009-09-11 12:12:54 +0200406
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300407 task = sched->pid_to_task[pid];
Ingo Molnarec156762009-09-11 12:12:54 +0200408
409 if (task)
410 return task;
411
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200412 task = zalloc(sizeof(*task));
Ingo Molnarec156762009-09-11 12:12:54 +0200413 task->pid = pid;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300414 task->nr = sched->nr_tasks;
Ingo Molnarec156762009-09-11 12:12:54 +0200415 strcpy(task->comm, comm);
416 /*
417 * every task starts in sleeping state - this gets ignored
418 * if there's no wakeup pointing to this sleep state:
419 */
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300420 add_sched_event_sleep(sched, task, 0, 0);
Ingo Molnarec156762009-09-11 12:12:54 +0200421
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300422 sched->pid_to_task[pid] = task;
423 sched->nr_tasks++;
Yunlong Song0755bc42015-03-31 21:46:28 +0800424 sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_desc *));
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300425 BUG_ON(!sched->tasks);
426 sched->tasks[task->nr] = task;
Ingo Molnarec156762009-09-11 12:12:54 +0200427
Ingo Molnarad236fd2009-09-11 12:12:54 +0200428 if (verbose)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300429 printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm);
Ingo Molnarec156762009-09-11 12:12:54 +0200430
431 return task;
432}
433
434
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300435static void print_task_traces(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200436{
437 struct task_desc *task;
438 unsigned long i;
439
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300440 for (i = 0; i < sched->nr_tasks; i++) {
441 task = sched->tasks[i];
Ingo Molnarad236fd2009-09-11 12:12:54 +0200442 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
Ingo Molnarec156762009-09-11 12:12:54 +0200443 task->nr, task->comm, task->pid, task->nr_events);
444 }
445}
446
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300447static void add_cross_task_wakeups(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200448{
449 struct task_desc *task1, *task2;
450 unsigned long i, j;
451
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300452 for (i = 0; i < sched->nr_tasks; i++) {
453 task1 = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200454 j = i + 1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300455 if (j == sched->nr_tasks)
Ingo Molnarec156762009-09-11 12:12:54 +0200456 j = 0;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300457 task2 = sched->tasks[j];
458 add_sched_event_wakeup(sched, task1, 0, task2);
Ingo Molnarec156762009-09-11 12:12:54 +0200459 }
460}
461
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300462static void perf_sched__process_event(struct perf_sched *sched,
463 struct sched_atom *atom)
Ingo Molnarec156762009-09-11 12:12:54 +0200464{
465 int ret = 0;
Ingo Molnarec156762009-09-11 12:12:54 +0200466
mingo39aeb522009-09-14 20:04:48 +0200467 switch (atom->type) {
Ingo Molnarec156762009-09-11 12:12:54 +0200468 case SCHED_EVENT_RUN:
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300469 burn_nsecs(sched, atom->duration);
Ingo Molnarec156762009-09-11 12:12:54 +0200470 break;
471 case SCHED_EVENT_SLEEP:
mingo39aeb522009-09-14 20:04:48 +0200472 if (atom->wait_sem)
473 ret = sem_wait(atom->wait_sem);
Ingo Molnarec156762009-09-11 12:12:54 +0200474 BUG_ON(ret);
475 break;
476 case SCHED_EVENT_WAKEUP:
mingo39aeb522009-09-14 20:04:48 +0200477 if (atom->wait_sem)
478 ret = sem_post(atom->wait_sem);
Ingo Molnarec156762009-09-11 12:12:54 +0200479 BUG_ON(ret);
480 break;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +0200481 case SCHED_EVENT_MIGRATION:
482 break;
Ingo Molnarec156762009-09-11 12:12:54 +0200483 default:
484 BUG_ON(1);
485 }
486}
487
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200488static u64 get_cpu_usage_nsec_parent(void)
Ingo Molnarec156762009-09-11 12:12:54 +0200489{
490 struct rusage ru;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200491 u64 sum;
Ingo Molnarec156762009-09-11 12:12:54 +0200492 int err;
493
494 err = getrusage(RUSAGE_SELF, &ru);
495 BUG_ON(err);
496
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300497 sum = ru.ru_utime.tv_sec * NSEC_PER_SEC + ru.ru_utime.tv_usec * NSEC_PER_USEC;
498 sum += ru.ru_stime.tv_sec * NSEC_PER_SEC + ru.ru_stime.tv_usec * NSEC_PER_USEC;
Ingo Molnarec156762009-09-11 12:12:54 +0200499
500 return sum;
501}
502
Yunlong Song939cda52015-03-31 21:46:34 +0800503static int self_open_counters(struct perf_sched *sched, unsigned long cur_task)
Ingo Molnarec156762009-09-11 12:12:54 +0200504{
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800505 struct perf_event_attr attr;
Yunlong Song939cda52015-03-31 21:46:34 +0800506 char sbuf[STRERR_BUFSIZE], info[STRERR_BUFSIZE];
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800507 int fd;
Yunlong Song939cda52015-03-31 21:46:34 +0800508 struct rlimit limit;
509 bool need_privilege = false;
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800510
511 memset(&attr, 0, sizeof(attr));
512
513 attr.type = PERF_TYPE_SOFTWARE;
514 attr.config = PERF_COUNT_SW_TASK_CLOCK;
515
Yunlong Song939cda52015-03-31 21:46:34 +0800516force_again:
Yann Droneaud57480d22014-06-30 22:28:47 +0200517 fd = sys_perf_event_open(&attr, 0, -1, -1,
518 perf_event_open_cloexec_flag());
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800519
Yunlong Song1aff59b2015-03-31 21:46:33 +0800520 if (fd < 0) {
Yunlong Song939cda52015-03-31 21:46:34 +0800521 if (errno == EMFILE) {
522 if (sched->force) {
523 BUG_ON(getrlimit(RLIMIT_NOFILE, &limit) == -1);
524 limit.rlim_cur += sched->nr_tasks - cur_task;
525 if (limit.rlim_cur > limit.rlim_max) {
526 limit.rlim_max = limit.rlim_cur;
527 need_privilege = true;
528 }
529 if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
530 if (need_privilege && errno == EPERM)
531 strcpy(info, "Need privilege\n");
532 } else
533 goto force_again;
534 } else
535 strcpy(info, "Have a try with -f option\n");
536 }
Namhyung Kim60b7d142012-09-12 11:11:06 +0900537 pr_err("Error: sys_perf_event_open() syscall returned "
Yunlong Song939cda52015-03-31 21:46:34 +0800538 "with %d (%s)\n%s", fd,
Arnaldo Carvalho de Meloc8b5f2c2016-07-06 11:56:20 -0300539 str_error_r(errno, sbuf, sizeof(sbuf)), info);
Yunlong Song1aff59b2015-03-31 21:46:33 +0800540 exit(EXIT_FAILURE);
541 }
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800542 return fd;
543}
544
545static u64 get_cpu_usage_nsec_self(int fd)
546{
547 u64 runtime;
Ingo Molnarec156762009-09-11 12:12:54 +0200548 int ret;
549
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800550 ret = read(fd, &runtime, sizeof(runtime));
551 BUG_ON(ret != sizeof(runtime));
Ingo Molnarec156762009-09-11 12:12:54 +0200552
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800553 return runtime;
Ingo Molnarec156762009-09-11 12:12:54 +0200554}
555
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300556struct sched_thread_parms {
557 struct task_desc *task;
558 struct perf_sched *sched;
Yunlong Song08097ab2015-03-31 21:46:32 +0800559 int fd;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300560};
561
Ingo Molnarec156762009-09-11 12:12:54 +0200562static void *thread_func(void *ctx)
563{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300564 struct sched_thread_parms *parms = ctx;
565 struct task_desc *this_task = parms->task;
566 struct perf_sched *sched = parms->sched;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200567 u64 cpu_usage_0, cpu_usage_1;
Ingo Molnarec156762009-09-11 12:12:54 +0200568 unsigned long i, ret;
569 char comm2[22];
Yunlong Song08097ab2015-03-31 21:46:32 +0800570 int fd = parms->fd;
Ingo Molnarec156762009-09-11 12:12:54 +0200571
Arnaldo Carvalho de Melo74cf2492013-12-27 16:55:14 -0300572 zfree(&parms);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300573
Ingo Molnarec156762009-09-11 12:12:54 +0200574 sprintf(comm2, ":%s", this_task->comm);
575 prctl(PR_SET_NAME, comm2);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300576 if (fd < 0)
577 return NULL;
Ingo Molnarec156762009-09-11 12:12:54 +0200578again:
579 ret = sem_post(&this_task->ready_for_work);
580 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300581 ret = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200582 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300583 ret = pthread_mutex_unlock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200584 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200585
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800586 cpu_usage_0 = get_cpu_usage_nsec_self(fd);
Ingo Molnarec156762009-09-11 12:12:54 +0200587
588 for (i = 0; i < this_task->nr_events; i++) {
589 this_task->curr_event = i;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300590 perf_sched__process_event(sched, this_task->atoms[i]);
Ingo Molnarec156762009-09-11 12:12:54 +0200591 }
592
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800593 cpu_usage_1 = get_cpu_usage_nsec_self(fd);
Ingo Molnarec156762009-09-11 12:12:54 +0200594 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
Ingo Molnarec156762009-09-11 12:12:54 +0200595 ret = sem_post(&this_task->work_done_sem);
596 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200597
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300598 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200599 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300600 ret = pthread_mutex_unlock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200601 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200602
603 goto again;
604}
605
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300606static void create_tasks(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200607{
608 struct task_desc *task;
609 pthread_attr_t attr;
610 unsigned long i;
611 int err;
612
613 err = pthread_attr_init(&attr);
614 BUG_ON(err);
Jiri Pirko12f7e032011-01-10 14:14:23 -0200615 err = pthread_attr_setstacksize(&attr,
616 (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
Ingo Molnarec156762009-09-11 12:12:54 +0200617 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300618 err = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200619 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300620 err = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200621 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300622 for (i = 0; i < sched->nr_tasks; i++) {
623 struct sched_thread_parms *parms = malloc(sizeof(*parms));
624 BUG_ON(parms == NULL);
625 parms->task = task = sched->tasks[i];
626 parms->sched = sched;
Yunlong Song939cda52015-03-31 21:46:34 +0800627 parms->fd = self_open_counters(sched, i);
Ingo Molnarec156762009-09-11 12:12:54 +0200628 sem_init(&task->sleep_sem, 0, 0);
629 sem_init(&task->ready_for_work, 0, 0);
630 sem_init(&task->work_done_sem, 0, 0);
631 task->curr_event = 0;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300632 err = pthread_create(&task->thread, &attr, thread_func, parms);
Ingo Molnarec156762009-09-11 12:12:54 +0200633 BUG_ON(err);
634 }
635}
636
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300637static void wait_for_tasks(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200638{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200639 u64 cpu_usage_0, cpu_usage_1;
Ingo Molnarec156762009-09-11 12:12:54 +0200640 struct task_desc *task;
641 unsigned long i, ret;
642
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300643 sched->start_time = get_nsecs();
644 sched->cpu_usage = 0;
645 pthread_mutex_unlock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200646
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300647 for (i = 0; i < sched->nr_tasks; i++) {
648 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200649 ret = sem_wait(&task->ready_for_work);
650 BUG_ON(ret);
651 sem_init(&task->ready_for_work, 0, 0);
652 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300653 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200654 BUG_ON(ret);
655
656 cpu_usage_0 = get_cpu_usage_nsec_parent();
657
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300658 pthread_mutex_unlock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200659
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300660 for (i = 0; i < sched->nr_tasks; i++) {
661 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200662 ret = sem_wait(&task->work_done_sem);
663 BUG_ON(ret);
664 sem_init(&task->work_done_sem, 0, 0);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300665 sched->cpu_usage += task->cpu_usage;
Ingo Molnarec156762009-09-11 12:12:54 +0200666 task->cpu_usage = 0;
667 }
668
669 cpu_usage_1 = get_cpu_usage_nsec_parent();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300670 if (!sched->runavg_cpu_usage)
671 sched->runavg_cpu_usage = sched->cpu_usage;
Yunlong Songff5f3bb2015-03-31 21:46:36 +0800672 sched->runavg_cpu_usage = (sched->runavg_cpu_usage * (sched->replay_repeat - 1) + sched->cpu_usage) / sched->replay_repeat;
Ingo Molnarec156762009-09-11 12:12:54 +0200673
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300674 sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
675 if (!sched->runavg_parent_cpu_usage)
676 sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
Yunlong Songff5f3bb2015-03-31 21:46:36 +0800677 sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * (sched->replay_repeat - 1) +
678 sched->parent_cpu_usage)/sched->replay_repeat;
Ingo Molnarec156762009-09-11 12:12:54 +0200679
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300680 ret = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200681 BUG_ON(ret);
682
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300683 for (i = 0; i < sched->nr_tasks; i++) {
684 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200685 sem_init(&task->sleep_sem, 0, 0);
686 task->curr_event = 0;
687 }
688}
689
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300690static void run_one_test(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200691{
Kyle McMartinfb7d0b32011-01-24 11:13:04 -0500692 u64 T0, T1, delta, avg_delta, fluct;
Ingo Molnarec156762009-09-11 12:12:54 +0200693
694 T0 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300695 wait_for_tasks(sched);
Ingo Molnarec156762009-09-11 12:12:54 +0200696 T1 = get_nsecs();
697
698 delta = T1 - T0;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300699 sched->sum_runtime += delta;
700 sched->nr_runs++;
Ingo Molnarec156762009-09-11 12:12:54 +0200701
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300702 avg_delta = sched->sum_runtime / sched->nr_runs;
Ingo Molnarec156762009-09-11 12:12:54 +0200703 if (delta < avg_delta)
704 fluct = avg_delta - delta;
705 else
706 fluct = delta - avg_delta;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300707 sched->sum_fluct += fluct;
708 if (!sched->run_avg)
709 sched->run_avg = delta;
Yunlong Songff5f3bb2015-03-31 21:46:36 +0800710 sched->run_avg = (sched->run_avg * (sched->replay_repeat - 1) + delta) / sched->replay_repeat;
Ingo Molnarec156762009-09-11 12:12:54 +0200711
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300712 printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / NSEC_PER_MSEC);
Ingo Molnarec156762009-09-11 12:12:54 +0200713
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300714 printf("ravg: %0.2f, ", (double)sched->run_avg / NSEC_PER_MSEC);
Ingo Molnarec156762009-09-11 12:12:54 +0200715
Ingo Molnarad236fd2009-09-11 12:12:54 +0200716 printf("cpu: %0.2f / %0.2f",
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300717 (double)sched->cpu_usage / NSEC_PER_MSEC, (double)sched->runavg_cpu_usage / NSEC_PER_MSEC);
Ingo Molnarec156762009-09-11 12:12:54 +0200718
719#if 0
720 /*
Ingo Molnarfbf94822009-09-11 12:12:54 +0200721 * rusage statistics done by the parent, these are less
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300722 * accurate than the sched->sum_exec_runtime based statistics:
Ingo Molnarfbf94822009-09-11 12:12:54 +0200723 */
Ingo Molnarad236fd2009-09-11 12:12:54 +0200724 printf(" [%0.2f / %0.2f]",
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300725 (double)sched->parent_cpu_usage / NSEC_PER_MSEC,
726 (double)sched->runavg_parent_cpu_usage / NSEC_PER_MSEC);
Ingo Molnarec156762009-09-11 12:12:54 +0200727#endif
728
Ingo Molnarad236fd2009-09-11 12:12:54 +0200729 printf("\n");
Ingo Molnarec156762009-09-11 12:12:54 +0200730
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300731 if (sched->nr_sleep_corrections)
732 printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections);
733 sched->nr_sleep_corrections = 0;
Ingo Molnarec156762009-09-11 12:12:54 +0200734}
735
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300736static void test_calibrations(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200737{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200738 u64 T0, T1;
Ingo Molnarec156762009-09-11 12:12:54 +0200739
740 T0 = get_nsecs();
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300741 burn_nsecs(sched, NSEC_PER_MSEC);
Ingo Molnarec156762009-09-11 12:12:54 +0200742 T1 = get_nsecs();
743
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200744 printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
Ingo Molnarec156762009-09-11 12:12:54 +0200745
746 T0 = get_nsecs();
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -0300747 sleep_nsecs(NSEC_PER_MSEC);
Ingo Molnarec156762009-09-11 12:12:54 +0200748 T1 = get_nsecs();
749
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200750 printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
Ingo Molnarec156762009-09-11 12:12:54 +0200751}
752
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300753static int
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300754replay_wakeup_event(struct perf_sched *sched,
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300755 struct perf_evsel *evsel, struct perf_sample *sample,
756 struct machine *machine __maybe_unused)
Ingo Molnarec156762009-09-11 12:12:54 +0200757{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300758 const char *comm = perf_evsel__strval(evsel, sample, "comm");
759 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200760 struct task_desc *waker, *wakee;
761
762 if (verbose) {
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300763 printf("sched_wakeup event %p\n", evsel);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200764
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300765 printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200766 }
767
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300768 waker = register_pid(sched, sample->tid, "<unknown>");
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300769 wakee = register_pid(sched, pid, comm);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200770
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300771 add_sched_event_wakeup(sched, waker, sample->time, wakee);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300772 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200773}
774
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300775static int replay_switch_event(struct perf_sched *sched,
776 struct perf_evsel *evsel,
777 struct perf_sample *sample,
778 struct machine *machine __maybe_unused)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200779{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300780 const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"),
781 *next_comm = perf_evsel__strval(evsel, sample, "next_comm");
782 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
783 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
784 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
Irina Tirdea1d037ca2012-09-11 01:15:03 +0300785 struct task_desc *prev, __maybe_unused *next;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -0300786 u64 timestamp0, timestamp = sample->time;
787 int cpu = sample->cpu;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200788 s64 delta;
789
Ingo Molnarad236fd2009-09-11 12:12:54 +0200790 if (verbose)
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300791 printf("sched_switch event %p\n", evsel);
Ingo Molnarad236fd2009-09-11 12:12:54 +0200792
Ingo Molnarfbf94822009-09-11 12:12:54 +0200793 if (cpu >= MAX_CPUS || cpu < 0)
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300794 return 0;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200795
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300796 timestamp0 = sched->cpu_last_switched[cpu];
Ingo Molnarfbf94822009-09-11 12:12:54 +0200797 if (timestamp0)
798 delta = timestamp - timestamp0;
799 else
800 delta = 0;
801
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300802 if (delta < 0) {
Namhyung Kim60b7d142012-09-12 11:11:06 +0900803 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300804 return -1;
805 }
Ingo Molnarfbf94822009-09-11 12:12:54 +0200806
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300807 pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
808 prev_comm, prev_pid, next_comm, next_pid, delta);
Ingo Molnarfbf94822009-09-11 12:12:54 +0200809
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300810 prev = register_pid(sched, prev_pid, prev_comm);
811 next = register_pid(sched, next_pid, next_comm);
Ingo Molnarfbf94822009-09-11 12:12:54 +0200812
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300813 sched->cpu_last_switched[cpu] = timestamp;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200814
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300815 add_sched_event_run(sched, prev, timestamp, delta);
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300816 add_sched_event_sleep(sched, prev, timestamp, prev_state);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300817
818 return 0;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200819}
820
David Aherncb627502013-08-07 22:50:47 -0400821static int replay_fork_event(struct perf_sched *sched,
822 union perf_event *event,
823 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200824{
David Aherncb627502013-08-07 22:50:47 -0400825 struct thread *child, *parent;
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300826
Adrian Hunter314add62013-08-27 11:23:03 +0300827 child = machine__findnew_thread(machine, event->fork.pid,
828 event->fork.tid);
829 parent = machine__findnew_thread(machine, event->fork.ppid,
830 event->fork.ptid);
David Aherncb627502013-08-07 22:50:47 -0400831
832 if (child == NULL || parent == NULL) {
833 pr_debug("thread does not exist on fork event: child %p, parent %p\n",
834 child, parent);
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -0300835 goto out_put;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200836 }
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300837
David Aherncb627502013-08-07 22:50:47 -0400838 if (verbose) {
839 printf("fork event\n");
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +0200840 printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid);
841 printf("... child: %s/%d\n", thread__comm_str(child), child->tid);
David Aherncb627502013-08-07 22:50:47 -0400842 }
843
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +0200844 register_pid(sched, parent->tid, thread__comm_str(parent));
845 register_pid(sched, child->tid, thread__comm_str(child));
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -0300846out_put:
847 thread__put(child);
848 thread__put(parent);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300849 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200850}
851
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200852struct sort_dimension {
853 const char *name;
Ingo Molnarb5fae122009-09-11 12:12:54 +0200854 sort_fn_t cmp;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200855 struct list_head list;
856};
857
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200858static int
mingo39aeb522009-09-14 20:04:48 +0200859thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200860{
861 struct sort_dimension *sort;
862 int ret = 0;
863
Ingo Molnarb5fae122009-09-11 12:12:54 +0200864 BUG_ON(list_empty(list));
865
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200866 list_for_each_entry(sort, list, list) {
867 ret = sort->cmp(l, r);
868 if (ret)
869 return ret;
870 }
871
872 return ret;
873}
874
mingo39aeb522009-09-14 20:04:48 +0200875static struct work_atoms *
Ingo Molnarb5fae122009-09-11 12:12:54 +0200876thread_atoms_search(struct rb_root *root, struct thread *thread,
877 struct list_head *sort_list)
878{
879 struct rb_node *node = root->rb_node;
mingo39aeb522009-09-14 20:04:48 +0200880 struct work_atoms key = { .thread = thread };
Ingo Molnarb5fae122009-09-11 12:12:54 +0200881
882 while (node) {
mingo39aeb522009-09-14 20:04:48 +0200883 struct work_atoms *atoms;
Ingo Molnarb5fae122009-09-11 12:12:54 +0200884 int cmp;
885
mingo39aeb522009-09-14 20:04:48 +0200886 atoms = container_of(node, struct work_atoms, node);
Ingo Molnarb5fae122009-09-11 12:12:54 +0200887
888 cmp = thread_lat_cmp(sort_list, &key, atoms);
889 if (cmp > 0)
890 node = node->rb_left;
891 else if (cmp < 0)
892 node = node->rb_right;
893 else {
894 BUG_ON(thread != atoms->thread);
895 return atoms;
896 }
897 }
898 return NULL;
899}
900
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200901static void
mingo39aeb522009-09-14 20:04:48 +0200902__thread_latency_insert(struct rb_root *root, struct work_atoms *data,
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200903 struct list_head *sort_list)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200904{
905 struct rb_node **new = &(root->rb_node), *parent = NULL;
906
907 while (*new) {
mingo39aeb522009-09-14 20:04:48 +0200908 struct work_atoms *this;
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200909 int cmp;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200910
mingo39aeb522009-09-14 20:04:48 +0200911 this = container_of(*new, struct work_atoms, node);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200912 parent = *new;
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200913
914 cmp = thread_lat_cmp(sort_list, data, this);
915
916 if (cmp > 0)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200917 new = &((*new)->rb_left);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200918 else
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200919 new = &((*new)->rb_right);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200920 }
921
922 rb_link_node(&data->node, parent, new);
923 rb_insert_color(&data->node, root);
924}
925
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300926static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200927{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200928 struct work_atoms *atoms = zalloc(sizeof(*atoms));
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300929 if (!atoms) {
930 pr_err("No memory at %s\n", __func__);
931 return -1;
932 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200933
Arnaldo Carvalho de Melof3b623b2015-03-02 22:21:35 -0300934 atoms->thread = thread__get(thread);
mingo39aeb522009-09-14 20:04:48 +0200935 INIT_LIST_HEAD(&atoms->work_list);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300936 __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300937 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200938}
939
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300940static char sched_out_state(u64 prev_state)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200941{
942 const char *str = TASK_STATE_TO_CHAR_STR;
943
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300944 return str[prev_state];
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200945}
946
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300947static int
mingo39aeb522009-09-14 20:04:48 +0200948add_sched_out_event(struct work_atoms *atoms,
949 char run_state,
950 u64 timestamp)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200951{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200952 struct work_atom *atom = zalloc(sizeof(*atom));
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300953 if (!atom) {
954 pr_err("Non memory at %s", __func__);
955 return -1;
956 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200957
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +0200958 atom->sched_out_time = timestamp;
959
mingo39aeb522009-09-14 20:04:48 +0200960 if (run_state == 'R') {
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200961 atom->state = THREAD_WAIT_CPU;
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +0200962 atom->wake_up_time = atom->sched_out_time;
Frederic Weisbeckerc6ced612009-09-13 00:46:19 +0200963 }
964
mingo39aeb522009-09-14 20:04:48 +0200965 list_add_tail(&atom->list, &atoms->work_list);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300966 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200967}
968
969static void
Irina Tirdea1d037ca2012-09-11 01:15:03 +0300970add_runtime_event(struct work_atoms *atoms, u64 delta,
971 u64 timestamp __maybe_unused)
mingo39aeb522009-09-14 20:04:48 +0200972{
973 struct work_atom *atom;
974
975 BUG_ON(list_empty(&atoms->work_list));
976
977 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
978
979 atom->runtime += delta;
980 atoms->total_runtime += delta;
981}
982
983static void
984add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200985{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200986 struct work_atom *atom;
Frederic Weisbecker66685672009-09-13 01:56:25 +0200987 u64 delta;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200988
mingo39aeb522009-09-14 20:04:48 +0200989 if (list_empty(&atoms->work_list))
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200990 return;
991
mingo39aeb522009-09-14 20:04:48 +0200992 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200993
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200994 if (atom->state != THREAD_WAIT_CPU)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200995 return;
996
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200997 if (timestamp < atom->wake_up_time) {
998 atom->state = THREAD_IGNORE;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200999 return;
1000 }
1001
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02001002 atom->state = THREAD_SCHED_IN;
1003 atom->sched_in_time = timestamp;
Frederic Weisbecker66685672009-09-13 01:56:25 +02001004
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02001005 delta = atom->sched_in_time - atom->wake_up_time;
Frederic Weisbecker66685672009-09-13 01:56:25 +02001006 atoms->total_lat += delta;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +01001007 if (delta > atoms->max_lat) {
Frederic Weisbecker66685672009-09-13 01:56:25 +02001008 atoms->max_lat = delta;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +01001009 atoms->max_lat_at = timestamp;
1010 }
Frederic Weisbecker66685672009-09-13 01:56:25 +02001011 atoms->nb_atoms++;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001012}
1013
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001014static int latency_switch_event(struct perf_sched *sched,
1015 struct perf_evsel *evsel,
1016 struct perf_sample *sample,
1017 struct machine *machine)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001018{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001019 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1020 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1021 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
mingo39aeb522009-09-14 20:04:48 +02001022 struct work_atoms *out_events, *in_events;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001023 struct thread *sched_out, *sched_in;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001024 u64 timestamp0, timestamp = sample->time;
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001025 int cpu = sample->cpu, err = -1;
Ingo Molnarea92ed52009-09-12 10:08:34 +02001026 s64 delta;
1027
mingo39aeb522009-09-14 20:04:48 +02001028 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
Ingo Molnarea92ed52009-09-12 10:08:34 +02001029
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001030 timestamp0 = sched->cpu_last_switched[cpu];
1031 sched->cpu_last_switched[cpu] = timestamp;
Ingo Molnarea92ed52009-09-12 10:08:34 +02001032 if (timestamp0)
1033 delta = timestamp - timestamp0;
1034 else
1035 delta = 0;
1036
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001037 if (delta < 0) {
1038 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
1039 return -1;
1040 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001041
Adrian Hunter1fcb8762014-07-14 13:02:25 +03001042 sched_out = machine__findnew_thread(machine, -1, prev_pid);
1043 sched_in = machine__findnew_thread(machine, -1, next_pid);
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001044 if (sched_out == NULL || sched_in == NULL)
1045 goto out_put;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001046
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001047 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
mingo39aeb522009-09-14 20:04:48 +02001048 if (!out_events) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001049 if (thread_atoms_insert(sched, sched_out))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001050 goto out_put;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001051 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001052 if (!out_events) {
1053 pr_err("out-event: Internal tree error");
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001054 goto out_put;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001055 }
mingo39aeb522009-09-14 20:04:48 +02001056 }
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001057 if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001058 return -1;
mingo39aeb522009-09-14 20:04:48 +02001059
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001060 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
mingo39aeb522009-09-14 20:04:48 +02001061 if (!in_events) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001062 if (thread_atoms_insert(sched, sched_in))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001063 goto out_put;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001064 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001065 if (!in_events) {
1066 pr_err("in-event: Internal tree error");
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001067 goto out_put;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001068 }
mingo39aeb522009-09-14 20:04:48 +02001069 /*
1070 * Take came in we have not heard about yet,
1071 * add in an initial atom in runnable state:
1072 */
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001073 if (add_sched_out_event(in_events, 'R', timestamp))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001074 goto out_put;
mingo39aeb522009-09-14 20:04:48 +02001075 }
1076 add_sched_in_event(in_events, timestamp);
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001077 err = 0;
1078out_put:
1079 thread__put(sched_out);
1080 thread__put(sched_in);
1081 return err;
mingo39aeb522009-09-14 20:04:48 +02001082}
1083
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001084static int latency_runtime_event(struct perf_sched *sched,
1085 struct perf_evsel *evsel,
1086 struct perf_sample *sample,
1087 struct machine *machine)
mingo39aeb522009-09-14 20:04:48 +02001088{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001089 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
1090 const u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
Adrian Hunter1fcb8762014-07-14 13:02:25 +03001091 struct thread *thread = machine__findnew_thread(machine, -1, pid);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001092 struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001093 u64 timestamp = sample->time;
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001094 int cpu = sample->cpu, err = -1;
1095
1096 if (thread == NULL)
1097 return -1;
mingo39aeb522009-09-14 20:04:48 +02001098
1099 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
mingo39aeb522009-09-14 20:04:48 +02001100 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001101 if (thread_atoms_insert(sched, thread))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001102 goto out_put;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001103 atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001104 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001105 pr_err("in-event: Internal tree error");
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001106 goto out_put;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001107 }
1108 if (add_sched_out_event(atoms, 'R', timestamp))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001109 goto out_put;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001110 }
1111
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001112 add_runtime_event(atoms, runtime, timestamp);
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001113 err = 0;
1114out_put:
1115 thread__put(thread);
1116 return err;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001117}
1118
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001119static int latency_wakeup_event(struct perf_sched *sched,
1120 struct perf_evsel *evsel,
1121 struct perf_sample *sample,
1122 struct machine *machine)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001123{
Peter Zijlstra0680ee72014-05-12 20:19:46 +02001124 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
mingo39aeb522009-09-14 20:04:48 +02001125 struct work_atoms *atoms;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02001126 struct work_atom *atom;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001127 struct thread *wakee;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001128 u64 timestamp = sample->time;
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001129 int err = -1;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001130
Adrian Hunter1fcb8762014-07-14 13:02:25 +03001131 wakee = machine__findnew_thread(machine, -1, pid);
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001132 if (wakee == NULL)
1133 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001134 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
Frederic Weisbecker17562202009-09-12 23:11:32 +02001135 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001136 if (thread_atoms_insert(sched, wakee))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001137 goto out_put;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001138 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001139 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001140 pr_err("wakeup-event: Internal tree error");
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001141 goto out_put;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001142 }
1143 if (add_sched_out_event(atoms, 'S', timestamp))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001144 goto out_put;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001145 }
1146
mingo39aeb522009-09-14 20:04:48 +02001147 BUG_ON(list_empty(&atoms->work_list));
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001148
mingo39aeb522009-09-14 20:04:48 +02001149 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001150
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001151 /*
Dongsheng Yang67d62592014-05-13 10:38:21 +09001152 * As we do not guarantee the wakeup event happens when
1153 * task is out of run queue, also may happen when task is
1154 * on run queue and wakeup only change ->state to TASK_RUNNING,
1155 * then we should not set the ->wake_up_time when wake up a
1156 * task which is on run queue.
1157 *
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001158 * You WILL be missing events if you've recorded only
1159 * one CPU, or are only looking at only one, so don't
Dongsheng Yang67d62592014-05-13 10:38:21 +09001160 * skip in this case.
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001161 */
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001162 if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001163 goto out_ok;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001164
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001165 sched->nr_timestamps++;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001166 if (atom->sched_out_time > timestamp) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001167 sched->nr_unordered_timestamps++;
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001168 goto out_ok;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001169 }
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +02001170
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02001171 atom->state = THREAD_WAIT_CPU;
1172 atom->wake_up_time = timestamp;
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001173out_ok:
1174 err = 0;
1175out_put:
1176 thread__put(wakee);
1177 return err;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001178}
1179
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001180static int latency_migrate_task_event(struct perf_sched *sched,
1181 struct perf_evsel *evsel,
1182 struct perf_sample *sample,
1183 struct machine *machine)
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001184{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001185 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001186 u64 timestamp = sample->time;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001187 struct work_atoms *atoms;
1188 struct work_atom *atom;
1189 struct thread *migrant;
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001190 int err = -1;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001191
1192 /*
1193 * Only need to worry about migration when profiling one CPU.
1194 */
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001195 if (sched->profile_cpu == -1)
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001196 return 0;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001197
Adrian Hunter1fcb8762014-07-14 13:02:25 +03001198 migrant = machine__findnew_thread(machine, -1, pid);
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001199 if (migrant == NULL)
1200 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001201 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001202 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001203 if (thread_atoms_insert(sched, migrant))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001204 goto out_put;
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +02001205 register_pid(sched, migrant->tid, thread__comm_str(migrant));
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001206 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001207 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001208 pr_err("migration-event: Internal tree error");
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001209 goto out_put;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001210 }
1211 if (add_sched_out_event(atoms, 'R', timestamp))
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001212 goto out_put;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001213 }
1214
1215 BUG_ON(list_empty(&atoms->work_list));
1216
1217 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1218 atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1219
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001220 sched->nr_timestamps++;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001221
1222 if (atom->sched_out_time > timestamp)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001223 sched->nr_unordered_timestamps++;
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001224 err = 0;
1225out_put:
1226 thread__put(migrant);
1227 return err;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001228}
1229
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001230static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001231{
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001232 int i;
1233 int ret;
Frederic Weisbecker66685672009-09-13 01:56:25 +02001234 u64 avg;
Namhyung Kim99620a52016-10-24 11:02:45 +09001235 char max_lat_at[32];
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001236
mingo39aeb522009-09-14 20:04:48 +02001237 if (!work_list->nb_atoms)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001238 return;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001239 /*
1240 * Ignore idle threads:
1241 */
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +02001242 if (!strcmp(thread__comm_str(work_list->thread), "swapper"))
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001243 return;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001244
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001245 sched->all_runtime += work_list->total_runtime;
1246 sched->all_count += work_list->nb_atoms;
Frederic Weisbecker66685672009-09-13 01:56:25 +02001247
Josef Bacik2f80dd42015-05-22 09:18:40 -04001248 if (work_list->num_merged > 1)
1249 ret = printf(" %s:(%d) ", thread__comm_str(work_list->thread), work_list->num_merged);
1250 else
1251 ret = printf(" %s:%d ", thread__comm_str(work_list->thread), work_list->thread->tid);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001252
mingo08f69e62009-09-14 18:30:44 +02001253 for (i = 0; i < 24 - ret; i++)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001254 printf(" ");
1255
mingo39aeb522009-09-14 20:04:48 +02001256 avg = work_list->total_lat / work_list->nb_atoms;
Namhyung Kim99620a52016-10-24 11:02:45 +09001257 timestamp__scnprintf_usec(work_list->max_lat_at, max_lat_at, sizeof(max_lat_at));
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001258
Namhyung Kim99620a52016-10-24 11:02:45 +09001259 printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13s s\n",
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -03001260 (double)work_list->total_runtime / NSEC_PER_MSEC,
1261 work_list->nb_atoms, (double)avg / NSEC_PER_MSEC,
1262 (double)work_list->max_lat / NSEC_PER_MSEC,
Namhyung Kim99620a52016-10-24 11:02:45 +09001263 max_lat_at);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001264}
1265
mingo39aeb522009-09-14 20:04:48 +02001266static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001267{
Jiri Olsa0014de12015-11-02 12:10:25 +01001268 if (l->thread == r->thread)
1269 return 0;
Adrian Hunter38051232013-07-04 16:20:31 +03001270 if (l->thread->tid < r->thread->tid)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001271 return -1;
Adrian Hunter38051232013-07-04 16:20:31 +03001272 if (l->thread->tid > r->thread->tid)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001273 return 1;
Jiri Olsa0014de12015-11-02 12:10:25 +01001274 return (int)(l->thread - r->thread);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001275}
1276
mingo39aeb522009-09-14 20:04:48 +02001277static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001278{
1279 u64 avgl, avgr;
1280
1281 if (!l->nb_atoms)
1282 return -1;
1283
1284 if (!r->nb_atoms)
1285 return 1;
1286
1287 avgl = l->total_lat / l->nb_atoms;
1288 avgr = r->total_lat / r->nb_atoms;
1289
1290 if (avgl < avgr)
1291 return -1;
1292 if (avgl > avgr)
1293 return 1;
1294
1295 return 0;
1296}
1297
mingo39aeb522009-09-14 20:04:48 +02001298static int max_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001299{
1300 if (l->max_lat < r->max_lat)
1301 return -1;
1302 if (l->max_lat > r->max_lat)
1303 return 1;
1304
1305 return 0;
1306}
1307
mingo39aeb522009-09-14 20:04:48 +02001308static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001309{
1310 if (l->nb_atoms < r->nb_atoms)
1311 return -1;
1312 if (l->nb_atoms > r->nb_atoms)
1313 return 1;
1314
1315 return 0;
1316}
1317
mingo39aeb522009-09-14 20:04:48 +02001318static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001319{
1320 if (l->total_runtime < r->total_runtime)
1321 return -1;
1322 if (l->total_runtime > r->total_runtime)
1323 return 1;
1324
1325 return 0;
1326}
1327
Randy Dunlapcbef79a2009-10-05 13:17:29 -07001328static int sort_dimension__add(const char *tok, struct list_head *list)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001329{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001330 size_t i;
1331 static struct sort_dimension avg_sort_dimension = {
1332 .name = "avg",
1333 .cmp = avg_cmp,
1334 };
1335 static struct sort_dimension max_sort_dimension = {
1336 .name = "max",
1337 .cmp = max_cmp,
1338 };
1339 static struct sort_dimension pid_sort_dimension = {
1340 .name = "pid",
1341 .cmp = pid_cmp,
1342 };
1343 static struct sort_dimension runtime_sort_dimension = {
1344 .name = "runtime",
1345 .cmp = runtime_cmp,
1346 };
1347 static struct sort_dimension switch_sort_dimension = {
1348 .name = "switch",
1349 .cmp = switch_cmp,
1350 };
1351 struct sort_dimension *available_sorts[] = {
1352 &pid_sort_dimension,
1353 &avg_sort_dimension,
1354 &max_sort_dimension,
1355 &switch_sort_dimension,
1356 &runtime_sort_dimension,
1357 };
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001358
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001359 for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001360 if (!strcmp(available_sorts[i]->name, tok)) {
1361 list_add_tail(&available_sorts[i]->list, list);
1362
1363 return 0;
1364 }
1365 }
1366
1367 return -1;
1368}
1369
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001370static void perf_sched__sort_lat(struct perf_sched *sched)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001371{
1372 struct rb_node *node;
Josef Bacik2f80dd42015-05-22 09:18:40 -04001373 struct rb_root *root = &sched->atom_root;
1374again:
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001375 for (;;) {
mingo39aeb522009-09-14 20:04:48 +02001376 struct work_atoms *data;
Josef Bacik2f80dd42015-05-22 09:18:40 -04001377 node = rb_first(root);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001378 if (!node)
1379 break;
1380
Josef Bacik2f80dd42015-05-22 09:18:40 -04001381 rb_erase(node, root);
mingo39aeb522009-09-14 20:04:48 +02001382 data = rb_entry(node, struct work_atoms, node);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001383 __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001384 }
Josef Bacik2f80dd42015-05-22 09:18:40 -04001385 if (root == &sched->atom_root) {
1386 root = &sched->merged_atom_root;
1387 goto again;
1388 }
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001389}
1390
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001391static int process_sched_wakeup_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001392 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001393 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001394 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001395{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001396 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001397
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001398 if (sched->tp_handler->wakeup_event)
1399 return sched->tp_handler->wakeup_event(sched, evsel, sample, machine);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001400
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001401 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001402}
1403
Jiri Olsaa151a372016-04-12 15:29:29 +02001404union map_priv {
1405 void *ptr;
1406 bool color;
1407};
1408
1409static bool thread__has_color(struct thread *thread)
1410{
1411 union map_priv priv = {
1412 .ptr = thread__priv(thread),
1413 };
1414
1415 return priv.color;
1416}
1417
1418static struct thread*
1419map__findnew_thread(struct perf_sched *sched, struct machine *machine, pid_t pid, pid_t tid)
1420{
1421 struct thread *thread = machine__findnew_thread(machine, pid, tid);
1422 union map_priv priv = {
1423 .color = false,
1424 };
1425
1426 if (!sched->map.color_pids || !thread || thread__priv(thread))
1427 return thread;
1428
1429 if (thread_map__has(sched->map.color_pids, tid))
1430 priv.color = true;
1431
1432 thread__set_priv(thread, priv.ptr);
1433 return thread;
1434}
1435
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001436static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
1437 struct perf_sample *sample, struct machine *machine)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001438{
Dongsheng Yang9d372ca2014-05-16 14:37:05 +09001439 const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1440 struct thread *sched_in;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001441 int new_shortname;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001442 u64 timestamp0, timestamp = sample->time;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001443 s64 delta;
Jiri Olsa99623c62016-04-12 15:29:26 +02001444 int i, this_cpu = sample->cpu;
1445 int cpus_nr;
1446 bool new_cpu = false;
Jiri Olsa8cd91192016-04-12 15:29:27 +02001447 const char *color = PERF_COLOR_NORMAL;
Namhyung Kim99620a52016-10-24 11:02:45 +09001448 char stimestamp[32];
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001449
1450 BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1451
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001452 if (this_cpu > sched->max_cpu)
1453 sched->max_cpu = this_cpu;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001454
Jiri Olsa99623c62016-04-12 15:29:26 +02001455 if (sched->map.comp) {
1456 cpus_nr = bitmap_weight(sched->map.comp_cpus_mask, MAX_CPUS);
1457 if (!test_and_set_bit(this_cpu, sched->map.comp_cpus_mask)) {
1458 sched->map.comp_cpus[cpus_nr++] = this_cpu;
1459 new_cpu = true;
1460 }
1461 } else
1462 cpus_nr = sched->max_cpu;
1463
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001464 timestamp0 = sched->cpu_last_switched[this_cpu];
1465 sched->cpu_last_switched[this_cpu] = timestamp;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001466 if (timestamp0)
1467 delta = timestamp - timestamp0;
1468 else
1469 delta = 0;
1470
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001471 if (delta < 0) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001472 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001473 return -1;
1474 }
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001475
Jiri Olsaa151a372016-04-12 15:29:29 +02001476 sched_in = map__findnew_thread(sched, machine, -1, next_pid);
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001477 if (sched_in == NULL)
1478 return -1;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001479
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001480 sched->curr_thread[this_cpu] = thread__get(sched_in);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001481
1482 printf(" ");
1483
1484 new_shortname = 0;
1485 if (!sched_in->shortname[0]) {
Dongsheng6bcab4e2014-05-06 14:39:01 +09001486 if (!strcmp(thread__comm_str(sched_in), "swapper")) {
1487 /*
1488 * Don't allocate a letter-number for swapper:0
1489 * as a shortname. Instead, we use '.' for it.
1490 */
1491 sched_in->shortname[0] = '.';
1492 sched_in->shortname[1] = ' ';
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001493 } else {
Dongsheng6bcab4e2014-05-06 14:39:01 +09001494 sched_in->shortname[0] = sched->next_shortname1;
1495 sched_in->shortname[1] = sched->next_shortname2;
1496
1497 if (sched->next_shortname1 < 'Z') {
1498 sched->next_shortname1++;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001499 } else {
Dongsheng6bcab4e2014-05-06 14:39:01 +09001500 sched->next_shortname1 = 'A';
1501 if (sched->next_shortname2 < '9')
1502 sched->next_shortname2++;
1503 else
1504 sched->next_shortname2 = '0';
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001505 }
1506 }
1507 new_shortname = 1;
1508 }
1509
Jiri Olsa99623c62016-04-12 15:29:26 +02001510 for (i = 0; i < cpus_nr; i++) {
1511 int cpu = sched->map.comp ? sched->map.comp_cpus[i] : i;
Jiri Olsaa151a372016-04-12 15:29:29 +02001512 struct thread *curr_thread = sched->curr_thread[cpu];
1513 const char *pid_color = color;
Jiri Olsacf294f22016-04-12 15:29:30 +02001514 const char *cpu_color = color;
Jiri Olsaa151a372016-04-12 15:29:29 +02001515
1516 if (curr_thread && thread__has_color(curr_thread))
1517 pid_color = COLOR_PIDS;
Jiri Olsa99623c62016-04-12 15:29:26 +02001518
Jiri Olsa73643bb2016-04-12 15:29:31 +02001519 if (sched->map.cpus && !cpu_map__has(sched->map.cpus, cpu))
1520 continue;
1521
Jiri Olsacf294f22016-04-12 15:29:30 +02001522 if (sched->map.color_cpus && cpu_map__has(sched->map.color_cpus, cpu))
1523 cpu_color = COLOR_CPUS;
1524
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001525 if (cpu != this_cpu)
Namhyung Kim1208bb22016-10-24 11:02:43 +09001526 color_fprintf(stdout, color, " ");
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001527 else
Jiri Olsacf294f22016-04-12 15:29:30 +02001528 color_fprintf(stdout, cpu_color, "*");
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001529
Dongsheng6bcab4e2014-05-06 14:39:01 +09001530 if (sched->curr_thread[cpu])
Jiri Olsaa151a372016-04-12 15:29:29 +02001531 color_fprintf(stdout, pid_color, "%2s ", sched->curr_thread[cpu]->shortname);
Dongsheng6bcab4e2014-05-06 14:39:01 +09001532 else
Jiri Olsa8cd91192016-04-12 15:29:27 +02001533 color_fprintf(stdout, color, " ");
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001534 }
1535
Jiri Olsa73643bb2016-04-12 15:29:31 +02001536 if (sched->map.cpus && !cpu_map__has(sched->map.cpus, this_cpu))
1537 goto out;
1538
Namhyung Kim99620a52016-10-24 11:02:45 +09001539 timestamp__scnprintf_usec(timestamp, stimestamp, sizeof(stimestamp));
1540 color_fprintf(stdout, color, " %12s secs ", stimestamp);
Namhyung Kime107f122016-10-24 11:02:44 +09001541 if (new_shortname || (verbose && sched_in->tid)) {
Jiri Olsaa151a372016-04-12 15:29:29 +02001542 const char *pid_color = color;
1543
1544 if (thread__has_color(sched_in))
1545 pid_color = COLOR_PIDS;
1546
1547 color_fprintf(stdout, pid_color, "%s => %s:%d",
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +02001548 sched_in->shortname, thread__comm_str(sched_in), sched_in->tid);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001549 }
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001550
Jiri Olsa99623c62016-04-12 15:29:26 +02001551 if (sched->map.comp && new_cpu)
Jiri Olsa8cd91192016-04-12 15:29:27 +02001552 color_fprintf(stdout, color, " (CPU %d)", this_cpu);
Jiri Olsa99623c62016-04-12 15:29:26 +02001553
Jiri Olsa73643bb2016-04-12 15:29:31 +02001554out:
Jiri Olsa8cd91192016-04-12 15:29:27 +02001555 color_fprintf(stdout, color, "\n");
Jiri Olsa99623c62016-04-12 15:29:26 +02001556
Arnaldo Carvalho de Melob91fc392015-04-06 20:43:22 -03001557 thread__put(sched_in);
1558
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001559 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001560}
1561
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001562static int process_sched_switch_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001563 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001564 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001565 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001566{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001567 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001568 int this_cpu = sample->cpu, err = 0;
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001569 u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1570 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001571
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001572 if (sched->curr_pid[this_cpu] != (u32)-1) {
Ingo Molnarc8a37752009-09-16 14:07:00 +02001573 /*
1574 * Are we trying to switch away a PID that is
1575 * not current?
1576 */
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001577 if (sched->curr_pid[this_cpu] != prev_pid)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001578 sched->nr_context_switch_bugs++;
Ingo Molnarc8a37752009-09-16 14:07:00 +02001579 }
Ingo Molnarc8a37752009-09-16 14:07:00 +02001580
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001581 if (sched->tp_handler->switch_event)
1582 err = sched->tp_handler->switch_event(sched, evsel, sample, machine);
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001583
1584 sched->curr_pid[this_cpu] = next_pid;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001585 return err;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001586}
1587
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001588static int process_sched_runtime_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001589 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001590 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001591 struct machine *machine)
mingo39aeb522009-09-14 20:04:48 +02001592{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001593 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
mingo39aeb522009-09-14 20:04:48 +02001594
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001595 if (sched->tp_handler->runtime_event)
1596 return sched->tp_handler->runtime_event(sched, evsel, sample, machine);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001597
1598 return 0;
Ingo Molnarec156762009-09-11 12:12:54 +02001599}
1600
David Aherncb627502013-08-07 22:50:47 -04001601static int perf_sched__process_fork_event(struct perf_tool *tool,
1602 union perf_event *event,
1603 struct perf_sample *sample,
1604 struct machine *machine)
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001605{
1606 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1607
David Aherncb627502013-08-07 22:50:47 -04001608 /* run the fork event through the perf machineruy */
1609 perf_event__process_fork(tool, event, sample, machine);
1610
1611 /* and then run additional processing needed for this command */
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001612 if (sched->tp_handler->fork_event)
David Aherncb627502013-08-07 22:50:47 -04001613 return sched->tp_handler->fork_event(sched, event, machine);
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001614
1615 return 0;
1616}
1617
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001618static int process_sched_migrate_task_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001619 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001620 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001621 struct machine *machine)
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001622{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001623 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001624
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001625 if (sched->tp_handler->migrate_task_event)
1626 return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001627
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001628 return 0;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001629}
1630
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001631typedef int (*tracepoint_handler)(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001632 struct perf_evsel *evsel,
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001633 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001634 struct machine *machine);
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001635
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001636static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused,
1637 union perf_event *event __maybe_unused,
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001638 struct perf_sample *sample,
1639 struct perf_evsel *evsel,
1640 struct machine *machine)
Ingo Molnarec156762009-09-11 12:12:54 +02001641{
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001642 int err = 0;
Ingo Molnarec156762009-09-11 12:12:54 +02001643
Arnaldo Carvalho de Melo744a9712013-11-06 10:17:38 -03001644 if (evsel->handler != NULL) {
1645 tracepoint_handler f = evsel->handler;
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001646 err = f(tool, evsel, sample, machine);
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001647 }
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001648
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001649 return err;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001650}
1651
Arnaldo Carvalho de Meloae536ac2015-03-02 22:28:41 -03001652static int perf_sched__read_events(struct perf_sched *sched)
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001653{
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001654 const struct perf_evsel_str_handler handlers[] = {
1655 { "sched:sched_switch", process_sched_switch_event, },
1656 { "sched:sched_stat_runtime", process_sched_runtime_event, },
1657 { "sched:sched_wakeup", process_sched_wakeup_event, },
1658 { "sched:sched_wakeup_new", process_sched_wakeup_event, },
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001659 { "sched:sched_migrate_task", process_sched_migrate_task_event, },
1660 };
Arnaldo Carvalho de Meloda378962012-06-27 13:08:42 -03001661 struct perf_session *session;
Jiri Olsaf5fc14122013-10-15 16:27:32 +02001662 struct perf_data_file file = {
1663 .path = input_name,
1664 .mode = PERF_DATA_MODE_READ,
Yunlong Songf0dd3302015-03-31 21:46:35 +08001665 .force = sched->force,
Jiri Olsaf5fc14122013-10-15 16:27:32 +02001666 };
Arnaldo Carvalho de Meloae536ac2015-03-02 22:28:41 -03001667 int rc = -1;
Arnaldo Carvalho de Meloda378962012-06-27 13:08:42 -03001668
Jiri Olsaf5fc14122013-10-15 16:27:32 +02001669 session = perf_session__new(&file, false, &sched->tool);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001670 if (session == NULL) {
1671 pr_debug("No Memory for session\n");
1672 return -1;
1673 }
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -02001674
Namhyung Kim0a7e6d12014-08-12 15:40:45 +09001675 symbol__init(&session->header.env);
Namhyung Kim04934102014-08-12 15:40:41 +09001676
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001677 if (perf_session__set_tracepoints_handlers(session, handlers))
1678 goto out_delete;
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001679
Arnaldo Carvalho de Melocee75ac2010-05-14 13:16:55 -03001680 if (perf_session__has_traces(session, "record -R")) {
Arnaldo Carvalho de Melob7b61cb2015-03-03 11:58:45 -03001681 int err = perf_session__process_events(session);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001682 if (err) {
1683 pr_err("Failed to process events, error %d", err);
1684 goto out_delete;
1685 }
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001686
Arnaldo Carvalho de Melo75be9892015-02-14 14:50:11 -03001687 sched->nr_events = session->evlist->stats.nr_events[0];
1688 sched->nr_lost_events = session->evlist->stats.total_lost;
1689 sched->nr_lost_chunks = session->evlist->stats.nr_events[PERF_RECORD_LOST];
Arnaldo Carvalho de Melocee75ac2010-05-14 13:16:55 -03001690 }
Arnaldo Carvalho de Melod549c7692009-12-27 21:37:02 -02001691
Arnaldo Carvalho de Meloae536ac2015-03-02 22:28:41 -03001692 rc = 0;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001693out_delete:
1694 perf_session__delete(session);
Arnaldo Carvalho de Meloae536ac2015-03-02 22:28:41 -03001695 return rc;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001696}
1697
David Ahern49394a22016-11-16 15:06:29 +09001698/*
1699 * scheduling times are printed as msec.usec
1700 */
1701static inline void print_sched_time(unsigned long long nsecs, int width)
1702{
1703 unsigned long msecs;
1704 unsigned long usecs;
1705
1706 msecs = nsecs / NSEC_PER_MSEC;
1707 nsecs -= msecs * NSEC_PER_MSEC;
1708 usecs = nsecs / NSEC_PER_USEC;
1709 printf("%*lu.%03lu ", width, msecs, usecs);
1710}
1711
1712/*
1713 * returns runtime data for event, allocating memory for it the
1714 * first time it is used.
1715 */
1716static struct evsel_runtime *perf_evsel__get_runtime(struct perf_evsel *evsel)
1717{
1718 struct evsel_runtime *r = evsel->priv;
1719
1720 if (r == NULL) {
1721 r = zalloc(sizeof(struct evsel_runtime));
1722 evsel->priv = r;
1723 }
1724
1725 return r;
1726}
1727
1728/*
1729 * save last time event was seen per cpu
1730 */
1731static void perf_evsel__save_time(struct perf_evsel *evsel,
1732 u64 timestamp, u32 cpu)
1733{
1734 struct evsel_runtime *r = perf_evsel__get_runtime(evsel);
1735
1736 if (r == NULL)
1737 return;
1738
1739 if ((cpu >= r->ncpu) || (r->last_time == NULL)) {
1740 int i, n = __roundup_pow_of_two(cpu+1);
1741 void *p = r->last_time;
1742
1743 p = realloc(r->last_time, n * sizeof(u64));
1744 if (!p)
1745 return;
1746
1747 r->last_time = p;
1748 for (i = r->ncpu; i < n; ++i)
1749 r->last_time[i] = (u64) 0;
1750
1751 r->ncpu = n;
1752 }
1753
1754 r->last_time[cpu] = timestamp;
1755}
1756
1757/* returns last time this event was seen on the given cpu */
1758static u64 perf_evsel__get_time(struct perf_evsel *evsel, u32 cpu)
1759{
1760 struct evsel_runtime *r = perf_evsel__get_runtime(evsel);
1761
1762 if ((r == NULL) || (r->last_time == NULL) || (cpu >= r->ncpu))
1763 return 0;
1764
1765 return r->last_time[cpu];
1766}
1767
1768static int comm_width = 20;
1769
1770static char *timehist_get_commstr(struct thread *thread)
1771{
1772 static char str[32];
1773 const char *comm = thread__comm_str(thread);
1774 pid_t tid = thread->tid;
1775 pid_t pid = thread->pid_;
1776 int n;
1777
1778 if (pid == 0)
1779 n = scnprintf(str, sizeof(str), "%s", comm);
1780
1781 else if (tid != pid)
1782 n = scnprintf(str, sizeof(str), "%s[%d/%d]", comm, tid, pid);
1783
1784 else
1785 n = scnprintf(str, sizeof(str), "%s[%d]", comm, tid);
1786
1787 if (n > comm_width)
1788 comm_width = n;
1789
1790 return str;
1791}
1792
David Aherna407b062016-11-16 15:06:33 +09001793static void timehist_header(struct perf_sched *sched)
David Ahern49394a22016-11-16 15:06:29 +09001794{
David Aherna407b062016-11-16 15:06:33 +09001795 u32 ncpus = sched->max_cpu + 1;
1796 u32 i, j;
1797
David Ahern49394a22016-11-16 15:06:29 +09001798 printf("%15s %6s ", "time", "cpu");
1799
David Aherna407b062016-11-16 15:06:33 +09001800 if (sched->show_cpu_visual) {
1801 printf(" ");
1802 for (i = 0, j = 0; i < ncpus; ++i) {
1803 printf("%x", j++);
1804 if (j > 15)
1805 j = 0;
1806 }
1807 printf(" ");
1808 }
1809
David Ahern49394a22016-11-16 15:06:29 +09001810 printf(" %-20s %9s %9s %9s",
1811 "task name", "wait time", "sch delay", "run time");
1812
1813 printf("\n");
1814
1815 /*
1816 * units row
1817 */
1818 printf("%15s %-6s ", "", "");
1819
David Aherna407b062016-11-16 15:06:33 +09001820 if (sched->show_cpu_visual)
1821 printf(" %*s ", ncpus, "");
1822
David Ahern49394a22016-11-16 15:06:29 +09001823 printf(" %-20s %9s %9s %9s\n", "[tid/pid]", "(msec)", "(msec)", "(msec)");
1824
1825 /*
1826 * separator
1827 */
1828 printf("%.15s %.6s ", graph_dotted_line, graph_dotted_line);
1829
David Aherna407b062016-11-16 15:06:33 +09001830 if (sched->show_cpu_visual)
1831 printf(" %.*s ", ncpus, graph_dotted_line);
1832
David Ahern49394a22016-11-16 15:06:29 +09001833 printf(" %.20s %.9s %.9s %.9s",
1834 graph_dotted_line, graph_dotted_line, graph_dotted_line,
1835 graph_dotted_line);
1836
1837 printf("\n");
1838}
1839
David Ahernfc1469f2016-11-16 15:06:31 +09001840static void timehist_print_sample(struct perf_sched *sched,
1841 struct perf_sample *sample,
David Ahern6c973c92016-11-16 15:06:32 +09001842 struct addr_location *al,
David Ahern853b7402016-11-29 10:15:44 -07001843 struct thread *thread,
1844 u64 t)
David Ahern49394a22016-11-16 15:06:29 +09001845{
1846 struct thread_runtime *tr = thread__priv(thread);
David Aherna407b062016-11-16 15:06:33 +09001847 u32 max_cpus = sched->max_cpu + 1;
David Ahern49394a22016-11-16 15:06:29 +09001848 char tstr[64];
1849
David Ahern853b7402016-11-29 10:15:44 -07001850 timestamp__scnprintf_usec(t, tstr, sizeof(tstr));
David Ahern49394a22016-11-16 15:06:29 +09001851 printf("%15s [%04d] ", tstr, sample->cpu);
1852
David Aherna407b062016-11-16 15:06:33 +09001853 if (sched->show_cpu_visual) {
1854 u32 i;
1855 char c;
1856
1857 printf(" ");
1858 for (i = 0; i < max_cpus; ++i) {
1859 /* flag idle times with 'i'; others are sched events */
1860 if (i == sample->cpu)
1861 c = (thread->tid == 0) ? 'i' : 's';
1862 else
1863 c = ' ';
1864 printf("%c", c);
1865 }
1866 printf(" ");
1867 }
1868
David Ahern49394a22016-11-16 15:06:29 +09001869 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
1870
1871 print_sched_time(tr->dt_wait, 6);
1872 print_sched_time(tr->dt_delay, 6);
1873 print_sched_time(tr->dt_run, 6);
David Ahernfc1469f2016-11-16 15:06:31 +09001874
1875 if (sched->show_wakeups)
1876 printf(" %-*s", comm_width, "");
1877
David Ahern6c973c92016-11-16 15:06:32 +09001878 if (thread->tid == 0)
1879 goto out;
1880
1881 if (sched->show_callchain)
1882 printf(" ");
1883
1884 sample__fprintf_sym(sample, al, 0,
1885 EVSEL__PRINT_SYM | EVSEL__PRINT_ONELINE |
Namhyung Kim2d9bbf62016-11-24 10:11:13 +09001886 EVSEL__PRINT_CALLCHAIN_ARROW |
1887 EVSEL__PRINT_SKIP_IGNORED,
David Ahern6c973c92016-11-16 15:06:32 +09001888 &callchain_cursor, stdout);
1889
1890out:
David Ahern49394a22016-11-16 15:06:29 +09001891 printf("\n");
1892}
1893
1894/*
1895 * Explanation of delta-time stats:
1896 *
1897 * t = time of current schedule out event
1898 * tprev = time of previous sched out event
1899 * also time of schedule-in event for current task
1900 * last_time = time of last sched change event for current task
1901 * (i.e, time process was last scheduled out)
1902 * ready_to_run = time of wakeup for current task
1903 *
1904 * -----|------------|------------|------------|------
1905 * last ready tprev t
1906 * time to run
1907 *
1908 * |-------- dt_wait --------|
1909 * |- dt_delay -|-- dt_run --|
1910 *
1911 * dt_run = run time of current task
1912 * dt_wait = time between last schedule out event for task and tprev
1913 * represents time spent off the cpu
1914 * dt_delay = time between wakeup and schedule-in of task
1915 */
1916
1917static void timehist_update_runtime_stats(struct thread_runtime *r,
1918 u64 t, u64 tprev)
1919{
1920 r->dt_delay = 0;
1921 r->dt_wait = 0;
1922 r->dt_run = 0;
1923 if (tprev) {
1924 r->dt_run = t - tprev;
1925 if (r->ready_to_run) {
1926 if (r->ready_to_run > tprev)
1927 pr_debug("time travel: wakeup time for task > previous sched_switch event\n");
1928 else
1929 r->dt_delay = tprev - r->ready_to_run;
1930 }
1931
1932 if (r->last_time > tprev)
1933 pr_debug("time travel: last sched out time for task > previous sched_switch event\n");
1934 else if (r->last_time)
1935 r->dt_wait = tprev - r->last_time;
1936 }
1937
1938 update_stats(&r->run_stats, r->dt_run);
1939 r->total_run_time += r->dt_run;
1940}
1941
Namhyung Kim96039c72016-12-08 23:47:50 +09001942static bool is_idle_sample(struct perf_sample *sample,
1943 struct perf_evsel *evsel)
David Ahern49394a22016-11-16 15:06:29 +09001944{
1945 /* pid 0 == swapper == idle task */
Namhyung Kim96039c72016-12-08 23:47:50 +09001946 if (strcmp(perf_evsel__name(evsel), "sched:sched_switch") == 0)
1947 return perf_evsel__intval(evsel, sample, "prev_pid") == 0;
David Ahern49394a22016-11-16 15:06:29 +09001948
Namhyung Kim96039c72016-12-08 23:47:50 +09001949 return sample->pid == 0;
1950}
1951
1952static void save_task_callchain(struct perf_sched *sched,
1953 struct perf_sample *sample,
1954 struct perf_evsel *evsel,
1955 struct machine *machine)
1956{
1957 struct callchain_cursor *cursor = &callchain_cursor;
1958 struct thread *thread;
David Ahern6c973c92016-11-16 15:06:32 +09001959
1960 /* want main thread for process - has maps */
1961 thread = machine__findnew_thread(machine, sample->pid, sample->pid);
1962 if (thread == NULL) {
1963 pr_debug("Failed to get thread for pid %d.\n", sample->pid);
Namhyung Kim96039c72016-12-08 23:47:50 +09001964 return;
David Ahern6c973c92016-11-16 15:06:32 +09001965 }
1966
1967 if (!symbol_conf.use_callchain || sample->callchain == NULL)
Namhyung Kim96039c72016-12-08 23:47:50 +09001968 return;
David Ahern6c973c92016-11-16 15:06:32 +09001969
1970 if (thread__resolve_callchain(thread, cursor, evsel, sample,
Namhyung Kim8388deb2016-11-24 10:11:14 +09001971 NULL, NULL, sched->max_stack + 2) != 0) {
David Ahern6c973c92016-11-16 15:06:32 +09001972 if (verbose)
1973 error("Failed to resolve callchain. Skipping\n");
1974
Namhyung Kim96039c72016-12-08 23:47:50 +09001975 return;
David Ahern6c973c92016-11-16 15:06:32 +09001976 }
Namhyung Kimcdeb01b2016-11-24 10:11:12 +09001977
David Ahern6c973c92016-11-16 15:06:32 +09001978 callchain_cursor_commit(cursor);
Namhyung Kimcdeb01b2016-11-24 10:11:12 +09001979
1980 while (true) {
1981 struct callchain_cursor_node *node;
1982 struct symbol *sym;
1983
1984 node = callchain_cursor_current(cursor);
1985 if (node == NULL)
1986 break;
1987
1988 sym = node->sym;
1989 if (sym && sym->name) {
1990 if (!strcmp(sym->name, "schedule") ||
1991 !strcmp(sym->name, "__schedule") ||
1992 !strcmp(sym->name, "preempt_schedule"))
1993 sym->ignore = 1;
1994 }
1995
1996 callchain_cursor_advance(cursor);
1997 }
David Ahern49394a22016-11-16 15:06:29 +09001998}
1999
2000/*
2001 * Track idle stats per cpu by maintaining a local thread
2002 * struct for the idle task on each cpu.
2003 */
2004static int init_idle_threads(int ncpu)
2005{
2006 int i;
2007
2008 idle_threads = zalloc(ncpu * sizeof(struct thread *));
2009 if (!idle_threads)
2010 return -ENOMEM;
2011
Namhyung Kimb3363522016-12-06 12:40:05 +09002012 idle_max_cpu = ncpu;
David Ahern49394a22016-11-16 15:06:29 +09002013
2014 /* allocate the actual thread struct if needed */
2015 for (i = 0; i < ncpu; ++i) {
2016 idle_threads[i] = thread__new(0, 0);
2017 if (idle_threads[i] == NULL)
2018 return -ENOMEM;
2019
2020 thread__set_comm(idle_threads[i], idle_comm, 0);
2021 }
2022
2023 return 0;
2024}
2025
2026static void free_idle_threads(void)
2027{
2028 int i;
2029
2030 if (idle_threads == NULL)
2031 return;
2032
Namhyung Kimb3363522016-12-06 12:40:05 +09002033 for (i = 0; i < idle_max_cpu; ++i) {
David Ahern49394a22016-11-16 15:06:29 +09002034 if ((idle_threads[i]))
2035 thread__delete(idle_threads[i]);
2036 }
2037
2038 free(idle_threads);
2039}
2040
2041static struct thread *get_idle_thread(int cpu)
2042{
2043 /*
2044 * expand/allocate array of pointers to local thread
2045 * structs if needed
2046 */
2047 if ((cpu >= idle_max_cpu) || (idle_threads == NULL)) {
2048 int i, j = __roundup_pow_of_two(cpu+1);
2049 void *p;
2050
2051 p = realloc(idle_threads, j * sizeof(struct thread *));
2052 if (!p)
2053 return NULL;
2054
2055 idle_threads = (struct thread **) p;
Namhyung Kimb3363522016-12-06 12:40:05 +09002056 for (i = idle_max_cpu; i < j; ++i)
David Ahern49394a22016-11-16 15:06:29 +09002057 idle_threads[i] = NULL;
2058
2059 idle_max_cpu = j;
2060 }
2061
2062 /* allocate a new thread struct if needed */
2063 if (idle_threads[cpu] == NULL) {
2064 idle_threads[cpu] = thread__new(0, 0);
2065
2066 if (idle_threads[cpu]) {
2067 idle_threads[cpu]->tid = 0;
2068 thread__set_comm(idle_threads[cpu], idle_comm, 0);
2069 }
2070 }
2071
2072 return idle_threads[cpu];
2073}
2074
2075/*
2076 * handle runtime stats saved per thread
2077 */
2078static struct thread_runtime *thread__init_runtime(struct thread *thread)
2079{
2080 struct thread_runtime *r;
2081
2082 r = zalloc(sizeof(struct thread_runtime));
2083 if (!r)
2084 return NULL;
2085
2086 init_stats(&r->run_stats);
2087 thread__set_priv(thread, r);
2088
2089 return r;
2090}
2091
2092static struct thread_runtime *thread__get_runtime(struct thread *thread)
2093{
2094 struct thread_runtime *tr;
2095
2096 tr = thread__priv(thread);
2097 if (tr == NULL) {
2098 tr = thread__init_runtime(thread);
2099 if (tr == NULL)
2100 pr_debug("Failed to malloc memory for runtime data.\n");
2101 }
2102
2103 return tr;
2104}
2105
David Ahern6c973c92016-11-16 15:06:32 +09002106static struct thread *timehist_get_thread(struct perf_sched *sched,
2107 struct perf_sample *sample,
David Ahern49394a22016-11-16 15:06:29 +09002108 struct machine *machine,
2109 struct perf_evsel *evsel)
2110{
2111 struct thread *thread;
2112
Namhyung Kim96039c72016-12-08 23:47:50 +09002113 if (is_idle_sample(sample, evsel)) {
David Ahern49394a22016-11-16 15:06:29 +09002114 thread = get_idle_thread(sample->cpu);
2115 if (thread == NULL)
2116 pr_err("Failed to get idle thread for cpu %d.\n", sample->cpu);
2117
2118 } else {
Namhyung Kim5d92d962016-12-06 12:40:03 +09002119 /* there were samples with tid 0 but non-zero pid */
2120 thread = machine__findnew_thread(machine, sample->pid,
2121 sample->tid ?: sample->pid);
David Ahern49394a22016-11-16 15:06:29 +09002122 if (thread == NULL) {
2123 pr_debug("Failed to get thread for tid %d. skipping sample.\n",
2124 sample->tid);
2125 }
Namhyung Kim96039c72016-12-08 23:47:50 +09002126
2127 save_task_callchain(sched, sample, evsel, machine);
David Ahern49394a22016-11-16 15:06:29 +09002128 }
2129
2130 return thread;
2131}
2132
David Ahern52df1382016-11-16 15:06:30 +09002133static bool timehist_skip_sample(struct perf_sched *sched,
2134 struct thread *thread)
David Ahern49394a22016-11-16 15:06:29 +09002135{
2136 bool rc = false;
2137
David Ahern52df1382016-11-16 15:06:30 +09002138 if (thread__is_filtered(thread)) {
David Ahern49394a22016-11-16 15:06:29 +09002139 rc = true;
David Ahern52df1382016-11-16 15:06:30 +09002140 sched->skipped_samples++;
2141 }
David Ahern49394a22016-11-16 15:06:29 +09002142
2143 return rc;
2144}
2145
David Ahernfc1469f2016-11-16 15:06:31 +09002146static void timehist_print_wakeup_event(struct perf_sched *sched,
2147 struct perf_sample *sample,
2148 struct machine *machine,
2149 struct thread *awakened)
2150{
2151 struct thread *thread;
2152 char tstr[64];
2153
2154 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2155 if (thread == NULL)
2156 return;
2157
2158 /* show wakeup unless both awakee and awaker are filtered */
2159 if (timehist_skip_sample(sched, thread) &&
2160 timehist_skip_sample(sched, awakened)) {
2161 return;
2162 }
2163
2164 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2165 printf("%15s [%04d] ", tstr, sample->cpu);
David Aherna407b062016-11-16 15:06:33 +09002166 if (sched->show_cpu_visual)
2167 printf(" %*s ", sched->max_cpu + 1, "");
David Ahernfc1469f2016-11-16 15:06:31 +09002168
2169 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2170
2171 /* dt spacer */
2172 printf(" %9s %9s %9s ", "", "", "");
2173
2174 printf("awakened: %s", timehist_get_commstr(awakened));
2175
2176 printf("\n");
2177}
2178
2179static int timehist_sched_wakeup_event(struct perf_tool *tool,
David Ahern49394a22016-11-16 15:06:29 +09002180 union perf_event *event __maybe_unused,
2181 struct perf_evsel *evsel,
2182 struct perf_sample *sample,
2183 struct machine *machine)
2184{
David Ahernfc1469f2016-11-16 15:06:31 +09002185 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
David Ahern49394a22016-11-16 15:06:29 +09002186 struct thread *thread;
2187 struct thread_runtime *tr = NULL;
2188 /* want pid of awakened task not pid in sample */
2189 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
2190
2191 thread = machine__findnew_thread(machine, 0, pid);
2192 if (thread == NULL)
2193 return -1;
2194
2195 tr = thread__get_runtime(thread);
2196 if (tr == NULL)
2197 return -1;
2198
2199 if (tr->ready_to_run == 0)
2200 tr->ready_to_run = sample->time;
2201
David Ahernfc1469f2016-11-16 15:06:31 +09002202 /* show wakeups if requested */
David Ahern853b7402016-11-29 10:15:44 -07002203 if (sched->show_wakeups &&
2204 !perf_time__skip_sample(&sched->ptime, sample->time))
David Ahernfc1469f2016-11-16 15:06:31 +09002205 timehist_print_wakeup_event(sched, sample, machine, thread);
2206
David Ahern49394a22016-11-16 15:06:29 +09002207 return 0;
2208}
2209
David Ahern350f54f2016-11-25 09:28:41 -07002210static void timehist_print_migration_event(struct perf_sched *sched,
2211 struct perf_evsel *evsel,
2212 struct perf_sample *sample,
2213 struct machine *machine,
2214 struct thread *migrated)
2215{
2216 struct thread *thread;
2217 char tstr[64];
2218 u32 max_cpus = sched->max_cpu + 1;
2219 u32 ocpu, dcpu;
2220
2221 if (sched->summary_only)
2222 return;
2223
2224 max_cpus = sched->max_cpu + 1;
2225 ocpu = perf_evsel__intval(evsel, sample, "orig_cpu");
2226 dcpu = perf_evsel__intval(evsel, sample, "dest_cpu");
2227
2228 thread = machine__findnew_thread(machine, sample->pid, sample->tid);
2229 if (thread == NULL)
2230 return;
2231
2232 if (timehist_skip_sample(sched, thread) &&
2233 timehist_skip_sample(sched, migrated)) {
2234 return;
2235 }
2236
2237 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2238 printf("%15s [%04d] ", tstr, sample->cpu);
2239
2240 if (sched->show_cpu_visual) {
2241 u32 i;
2242 char c;
2243
2244 printf(" ");
2245 for (i = 0; i < max_cpus; ++i) {
2246 c = (i == sample->cpu) ? 'm' : ' ';
2247 printf("%c", c);
2248 }
2249 printf(" ");
2250 }
2251
2252 printf(" %-*s ", comm_width, timehist_get_commstr(thread));
2253
2254 /* dt spacer */
2255 printf(" %9s %9s %9s ", "", "", "");
2256
2257 printf("migrated: %s", timehist_get_commstr(migrated));
2258 printf(" cpu %d => %d", ocpu, dcpu);
2259
2260 printf("\n");
2261}
2262
2263static int timehist_migrate_task_event(struct perf_tool *tool,
2264 union perf_event *event __maybe_unused,
2265 struct perf_evsel *evsel,
2266 struct perf_sample *sample,
2267 struct machine *machine)
2268{
2269 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2270 struct thread *thread;
2271 struct thread_runtime *tr = NULL;
2272 /* want pid of migrated task not pid in sample */
2273 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
2274
2275 thread = machine__findnew_thread(machine, 0, pid);
2276 if (thread == NULL)
2277 return -1;
2278
2279 tr = thread__get_runtime(thread);
2280 if (tr == NULL)
2281 return -1;
2282
2283 tr->migrations++;
2284
2285 /* show migrations if requested */
2286 timehist_print_migration_event(sched, evsel, sample, machine, thread);
2287
2288 return 0;
2289}
2290
David Ahern52df1382016-11-16 15:06:30 +09002291static int timehist_sched_change_event(struct perf_tool *tool,
David Ahern49394a22016-11-16 15:06:29 +09002292 union perf_event *event,
2293 struct perf_evsel *evsel,
2294 struct perf_sample *sample,
2295 struct machine *machine)
2296{
David Ahernfc1469f2016-11-16 15:06:31 +09002297 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
David Ahern853b7402016-11-29 10:15:44 -07002298 struct perf_time_interval *ptime = &sched->ptime;
David Ahern49394a22016-11-16 15:06:29 +09002299 struct addr_location al;
2300 struct thread *thread;
2301 struct thread_runtime *tr = NULL;
David Ahern853b7402016-11-29 10:15:44 -07002302 u64 tprev, t = sample->time;
David Ahern49394a22016-11-16 15:06:29 +09002303 int rc = 0;
2304
2305 if (machine__resolve(machine, &al, sample) < 0) {
2306 pr_err("problem processing %d event. skipping it\n",
2307 event->header.type);
2308 rc = -1;
2309 goto out;
2310 }
2311
David Ahern6c973c92016-11-16 15:06:32 +09002312 thread = timehist_get_thread(sched, sample, machine, evsel);
David Ahern49394a22016-11-16 15:06:29 +09002313 if (thread == NULL) {
2314 rc = -1;
2315 goto out;
2316 }
2317
David Ahern52df1382016-11-16 15:06:30 +09002318 if (timehist_skip_sample(sched, thread))
David Ahern49394a22016-11-16 15:06:29 +09002319 goto out;
2320
2321 tr = thread__get_runtime(thread);
2322 if (tr == NULL) {
2323 rc = -1;
2324 goto out;
2325 }
2326
2327 tprev = perf_evsel__get_time(evsel, sample->cpu);
2328
David Ahern853b7402016-11-29 10:15:44 -07002329 /*
2330 * If start time given:
2331 * - sample time is under window user cares about - skip sample
2332 * - tprev is under window user cares about - reset to start of window
2333 */
2334 if (ptime->start && ptime->start > t)
2335 goto out;
2336
2337 if (ptime->start > tprev)
2338 tprev = ptime->start;
2339
2340 /*
2341 * If end time given:
2342 * - previous sched event is out of window - we are done
2343 * - sample time is beyond window user cares about - reset it
2344 * to close out stats for time window interest
2345 */
2346 if (ptime->end) {
2347 if (tprev > ptime->end)
2348 goto out;
2349
2350 if (t > ptime->end)
2351 t = ptime->end;
2352 }
2353
2354 timehist_update_runtime_stats(tr, t, tprev);
2355
David Ahern52df1382016-11-16 15:06:30 +09002356 if (!sched->summary_only)
David Ahern853b7402016-11-29 10:15:44 -07002357 timehist_print_sample(sched, sample, &al, thread, t);
David Ahern49394a22016-11-16 15:06:29 +09002358
2359out:
2360 if (tr) {
2361 /* time of this sched_switch event becomes last time task seen */
2362 tr->last_time = sample->time;
2363
2364 /* sched out event for task so reset ready to run time */
2365 tr->ready_to_run = 0;
2366 }
2367
2368 perf_evsel__save_time(evsel, sample->time, sample->cpu);
2369
2370 return rc;
2371}
2372
2373static int timehist_sched_switch_event(struct perf_tool *tool,
2374 union perf_event *event,
2375 struct perf_evsel *evsel,
2376 struct perf_sample *sample,
2377 struct machine *machine __maybe_unused)
2378{
2379 return timehist_sched_change_event(tool, event, evsel, sample, machine);
2380}
2381
2382static int process_lost(struct perf_tool *tool __maybe_unused,
2383 union perf_event *event,
2384 struct perf_sample *sample,
2385 struct machine *machine __maybe_unused)
2386{
2387 char tstr[64];
2388
2389 timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr));
2390 printf("%15s ", tstr);
2391 printf("lost %" PRIu64 " events on cpu %d\n", event->lost.lost, sample->cpu);
2392
2393 return 0;
2394}
2395
2396
David Ahern52df1382016-11-16 15:06:30 +09002397static void print_thread_runtime(struct thread *t,
2398 struct thread_runtime *r)
2399{
2400 double mean = avg_stats(&r->run_stats);
2401 float stddev;
2402
2403 printf("%*s %5d %9" PRIu64 " ",
2404 comm_width, timehist_get_commstr(t), t->ppid,
2405 (u64) r->run_stats.n);
2406
2407 print_sched_time(r->total_run_time, 8);
2408 stddev = rel_stddev_stats(stddev_stats(&r->run_stats), mean);
2409 print_sched_time(r->run_stats.min, 6);
2410 printf(" ");
2411 print_sched_time((u64) mean, 6);
2412 printf(" ");
2413 print_sched_time(r->run_stats.max, 6);
2414 printf(" ");
2415 printf("%5.2f", stddev);
David Ahern350f54f2016-11-25 09:28:41 -07002416 printf(" %5" PRIu64, r->migrations);
David Ahern52df1382016-11-16 15:06:30 +09002417 printf("\n");
2418}
2419
2420struct total_run_stats {
2421 u64 sched_count;
2422 u64 task_count;
2423 u64 total_run_time;
2424};
2425
2426static int __show_thread_runtime(struct thread *t, void *priv)
2427{
2428 struct total_run_stats *stats = priv;
2429 struct thread_runtime *r;
2430
2431 if (thread__is_filtered(t))
2432 return 0;
2433
2434 r = thread__priv(t);
2435 if (r && r->run_stats.n) {
2436 stats->task_count++;
2437 stats->sched_count += r->run_stats.n;
2438 stats->total_run_time += r->total_run_time;
2439 print_thread_runtime(t, r);
2440 }
2441
2442 return 0;
2443}
2444
2445static int show_thread_runtime(struct thread *t, void *priv)
2446{
2447 if (t->dead)
2448 return 0;
2449
2450 return __show_thread_runtime(t, priv);
2451}
2452
2453static int show_deadthread_runtime(struct thread *t, void *priv)
2454{
2455 if (!t->dead)
2456 return 0;
2457
2458 return __show_thread_runtime(t, priv);
2459}
2460
2461static void timehist_print_summary(struct perf_sched *sched,
2462 struct perf_session *session)
2463{
2464 struct machine *m = &session->machines.host;
2465 struct total_run_stats totals;
2466 u64 task_count;
2467 struct thread *t;
2468 struct thread_runtime *r;
2469 int i;
2470
2471 memset(&totals, 0, sizeof(totals));
2472
2473 if (comm_width < 30)
2474 comm_width = 30;
2475
2476 printf("\nRuntime summary\n");
2477 printf("%*s parent sched-in ", comm_width, "comm");
David Ahern350f54f2016-11-25 09:28:41 -07002478 printf(" run-time min-run avg-run max-run stddev migrations\n");
David Ahern52df1382016-11-16 15:06:30 +09002479 printf("%*s (count) ", comm_width, "");
2480 printf(" (msec) (msec) (msec) (msec) %%\n");
David Ahern350f54f2016-11-25 09:28:41 -07002481 printf("%.117s\n", graph_dotted_line);
David Ahern52df1382016-11-16 15:06:30 +09002482
2483 machine__for_each_thread(m, show_thread_runtime, &totals);
2484 task_count = totals.task_count;
2485 if (!task_count)
2486 printf("<no still running tasks>\n");
2487
2488 printf("\nTerminated tasks:\n");
2489 machine__for_each_thread(m, show_deadthread_runtime, &totals);
2490 if (task_count == totals.task_count)
2491 printf("<no terminated tasks>\n");
2492
2493 /* CPU idle stats not tracked when samples were skipped */
2494 if (sched->skipped_samples)
2495 return;
2496
2497 printf("\nIdle stats:\n");
Namhyung Kimb3363522016-12-06 12:40:05 +09002498 for (i = 0; i < idle_max_cpu; ++i) {
David Ahern52df1382016-11-16 15:06:30 +09002499 t = idle_threads[i];
2500 if (!t)
2501 continue;
2502
2503 r = thread__priv(t);
2504 if (r && r->run_stats.n) {
2505 totals.sched_count += r->run_stats.n;
2506 printf(" CPU %2d idle for ", i);
2507 print_sched_time(r->total_run_time, 6);
2508 printf(" msec\n");
2509 } else
2510 printf(" CPU %2d idle entire time window\n", i);
2511 }
2512
2513 printf("\n"
2514 " Total number of unique tasks: %" PRIu64 "\n"
2515 "Total number of context switches: %" PRIu64 "\n"
2516 " Total run time (msec): ",
2517 totals.task_count, totals.sched_count);
2518
2519 print_sched_time(totals.total_run_time, 2);
2520 printf("\n");
2521}
2522
David Ahern49394a22016-11-16 15:06:29 +09002523typedef int (*sched_handler)(struct perf_tool *tool,
2524 union perf_event *event,
2525 struct perf_evsel *evsel,
2526 struct perf_sample *sample,
2527 struct machine *machine);
2528
2529static int perf_timehist__process_sample(struct perf_tool *tool,
2530 union perf_event *event,
2531 struct perf_sample *sample,
2532 struct perf_evsel *evsel,
2533 struct machine *machine)
2534{
2535 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
2536 int err = 0;
2537 int this_cpu = sample->cpu;
2538
2539 if (this_cpu > sched->max_cpu)
2540 sched->max_cpu = this_cpu;
2541
2542 if (evsel->handler != NULL) {
2543 sched_handler f = evsel->handler;
2544
2545 err = f(tool, event, evsel, sample, machine);
2546 }
2547
2548 return err;
2549}
2550
David Ahern6c973c92016-11-16 15:06:32 +09002551static int timehist_check_attr(struct perf_sched *sched,
2552 struct perf_evlist *evlist)
2553{
2554 struct perf_evsel *evsel;
2555 struct evsel_runtime *er;
2556
2557 list_for_each_entry(evsel, &evlist->entries, node) {
2558 er = perf_evsel__get_runtime(evsel);
2559 if (er == NULL) {
2560 pr_err("Failed to allocate memory for evsel runtime data\n");
2561 return -1;
2562 }
2563
2564 if (sched->show_callchain &&
2565 !(evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN)) {
2566 pr_info("Samples do not have callchains.\n");
2567 sched->show_callchain = 0;
2568 symbol_conf.use_callchain = 0;
2569 }
2570 }
2571
2572 return 0;
2573}
2574
David Ahern49394a22016-11-16 15:06:29 +09002575static int perf_sched__timehist(struct perf_sched *sched)
2576{
2577 const struct perf_evsel_str_handler handlers[] = {
2578 { "sched:sched_switch", timehist_sched_switch_event, },
2579 { "sched:sched_wakeup", timehist_sched_wakeup_event, },
2580 { "sched:sched_wakeup_new", timehist_sched_wakeup_event, },
2581 };
David Ahern350f54f2016-11-25 09:28:41 -07002582 const struct perf_evsel_str_handler migrate_handlers[] = {
2583 { "sched:sched_migrate_task", timehist_migrate_task_event, },
2584 };
David Ahern49394a22016-11-16 15:06:29 +09002585 struct perf_data_file file = {
2586 .path = input_name,
2587 .mode = PERF_DATA_MODE_READ,
Namhyung Kim6fa94252016-12-06 12:40:01 +09002588 .force = sched->force,
David Ahern49394a22016-11-16 15:06:29 +09002589 };
2590
2591 struct perf_session *session;
David Ahern52df1382016-11-16 15:06:30 +09002592 struct perf_evlist *evlist;
David Ahern49394a22016-11-16 15:06:29 +09002593 int err = -1;
2594
2595 /*
2596 * event handlers for timehist option
2597 */
2598 sched->tool.sample = perf_timehist__process_sample;
2599 sched->tool.mmap = perf_event__process_mmap;
2600 sched->tool.comm = perf_event__process_comm;
2601 sched->tool.exit = perf_event__process_exit;
2602 sched->tool.fork = perf_event__process_fork;
2603 sched->tool.lost = process_lost;
2604 sched->tool.attr = perf_event__process_attr;
2605 sched->tool.tracing_data = perf_event__process_tracing_data;
2606 sched->tool.build_id = perf_event__process_build_id;
2607
2608 sched->tool.ordered_events = true;
2609 sched->tool.ordering_requires_timestamps = true;
2610
David Ahern6c973c92016-11-16 15:06:32 +09002611 symbol_conf.use_callchain = sched->show_callchain;
2612
David Ahern49394a22016-11-16 15:06:29 +09002613 session = perf_session__new(&file, false, &sched->tool);
2614 if (session == NULL)
2615 return -ENOMEM;
2616
David Ahern52df1382016-11-16 15:06:30 +09002617 evlist = session->evlist;
2618
David Ahern49394a22016-11-16 15:06:29 +09002619 symbol__init(&session->header.env);
2620
David Ahern853b7402016-11-29 10:15:44 -07002621 if (perf_time__parse_str(&sched->ptime, sched->time_str) != 0) {
2622 pr_err("Invalid time string\n");
2623 return -EINVAL;
2624 }
2625
David Ahern6c973c92016-11-16 15:06:32 +09002626 if (timehist_check_attr(sched, evlist) != 0)
2627 goto out;
2628
David Ahern49394a22016-11-16 15:06:29 +09002629 setup_pager();
2630
2631 /* setup per-evsel handlers */
2632 if (perf_session__set_tracepoints_handlers(session, handlers))
2633 goto out;
2634
David Ahernf45bf8d2016-11-29 13:39:48 -07002635 /* sched_switch event at a minimum needs to exist */
2636 if (!perf_evlist__find_tracepoint_by_name(session->evlist,
2637 "sched:sched_switch")) {
2638 pr_err("No sched_switch events found. Have you run 'perf sched record'?\n");
David Ahern49394a22016-11-16 15:06:29 +09002639 goto out;
David Ahernf45bf8d2016-11-29 13:39:48 -07002640 }
David Ahern49394a22016-11-16 15:06:29 +09002641
David Ahern350f54f2016-11-25 09:28:41 -07002642 if (sched->show_migrations &&
2643 perf_session__set_tracepoints_handlers(session, migrate_handlers))
2644 goto out;
2645
David Ahern49394a22016-11-16 15:06:29 +09002646 /* pre-allocate struct for per-CPU idle stats */
2647 sched->max_cpu = session->header.env.nr_cpus_online;
2648 if (sched->max_cpu == 0)
2649 sched->max_cpu = 4;
2650 if (init_idle_threads(sched->max_cpu))
2651 goto out;
2652
David Ahern52df1382016-11-16 15:06:30 +09002653 /* summary_only implies summary option, but don't overwrite summary if set */
2654 if (sched->summary_only)
2655 sched->summary = sched->summary_only;
2656
2657 if (!sched->summary_only)
David Aherna407b062016-11-16 15:06:33 +09002658 timehist_header(sched);
David Ahern49394a22016-11-16 15:06:29 +09002659
2660 err = perf_session__process_events(session);
2661 if (err) {
2662 pr_err("Failed to process events, error %d", err);
2663 goto out;
2664 }
2665
David Ahern52df1382016-11-16 15:06:30 +09002666 sched->nr_events = evlist->stats.nr_events[0];
2667 sched->nr_lost_events = evlist->stats.total_lost;
2668 sched->nr_lost_chunks = evlist->stats.nr_events[PERF_RECORD_LOST];
2669
2670 if (sched->summary)
2671 timehist_print_summary(sched, session);
2672
David Ahern49394a22016-11-16 15:06:29 +09002673out:
2674 free_idle_threads();
2675 perf_session__delete(session);
2676
2677 return err;
2678}
2679
2680
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002681static void print_bad_events(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002682{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002683 if (sched->nr_unordered_timestamps && sched->nr_timestamps) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002684 printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002685 (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0,
2686 sched->nr_unordered_timestamps, sched->nr_timestamps);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002687 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002688 if (sched->nr_lost_events && sched->nr_events) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002689 printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002690 (double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
2691 sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002692 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002693 if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002694 printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002695 (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,
2696 sched->nr_context_switch_bugs, sched->nr_timestamps);
2697 if (sched->nr_lost_events)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002698 printf(" (due to lost events?)");
2699 printf("\n");
2700 }
2701}
2702
Josef Bacik2f80dd42015-05-22 09:18:40 -04002703static void __merge_work_atoms(struct rb_root *root, struct work_atoms *data)
2704{
2705 struct rb_node **new = &(root->rb_node), *parent = NULL;
2706 struct work_atoms *this;
2707 const char *comm = thread__comm_str(data->thread), *this_comm;
2708
2709 while (*new) {
2710 int cmp;
2711
2712 this = container_of(*new, struct work_atoms, node);
2713 parent = *new;
2714
2715 this_comm = thread__comm_str(this->thread);
2716 cmp = strcmp(comm, this_comm);
2717 if (cmp > 0) {
2718 new = &((*new)->rb_left);
2719 } else if (cmp < 0) {
2720 new = &((*new)->rb_right);
2721 } else {
2722 this->num_merged++;
2723 this->total_runtime += data->total_runtime;
2724 this->nb_atoms += data->nb_atoms;
2725 this->total_lat += data->total_lat;
2726 list_splice(&data->work_list, &this->work_list);
2727 if (this->max_lat < data->max_lat) {
2728 this->max_lat = data->max_lat;
2729 this->max_lat_at = data->max_lat_at;
2730 }
2731 zfree(&data);
2732 return;
2733 }
2734 }
2735
2736 data->num_merged++;
2737 rb_link_node(&data->node, parent, new);
2738 rb_insert_color(&data->node, root);
2739}
2740
2741static void perf_sched__merge_lat(struct perf_sched *sched)
2742{
2743 struct work_atoms *data;
2744 struct rb_node *node;
2745
2746 if (sched->skip_merge)
2747 return;
2748
2749 while ((node = rb_first(&sched->atom_root))) {
2750 rb_erase(node, &sched->atom_root);
2751 data = rb_entry(node, struct work_atoms, node);
2752 __merge_work_atoms(&sched->merged_atom_root, data);
2753 }
2754}
2755
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002756static int perf_sched__lat(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002757{
2758 struct rb_node *next;
2759
2760 setup_pager();
David Ahernad9def72013-08-07 22:50:44 -04002761
Arnaldo Carvalho de Meloae536ac2015-03-02 22:28:41 -03002762 if (perf_sched__read_events(sched))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03002763 return -1;
David Ahernad9def72013-08-07 22:50:44 -04002764
Josef Bacik2f80dd42015-05-22 09:18:40 -04002765 perf_sched__merge_lat(sched);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002766 perf_sched__sort_lat(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002767
Ramkumar Ramachandra80790e02014-03-17 10:18:21 -04002768 printf("\n -----------------------------------------------------------------------------------------------------------------\n");
2769 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n");
2770 printf(" -----------------------------------------------------------------------------------------------------------------\n");
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002771
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002772 next = rb_first(&sched->sorted_atom_root);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002773
2774 while (next) {
2775 struct work_atoms *work_list;
2776
2777 work_list = rb_entry(next, struct work_atoms, node);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002778 output_lat_thread(sched, work_list);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002779 next = rb_next(next);
Arnaldo Carvalho de Meloae536ac2015-03-02 22:28:41 -03002780 thread__zput(work_list->thread);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002781 }
2782
Ramkumar Ramachandra80790e02014-03-17 10:18:21 -04002783 printf(" -----------------------------------------------------------------------------------------------------------------\n");
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -02002784 printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n",
Arnaldo Carvalho de Melo4fc76e42016-08-08 12:23:49 -03002785 (double)sched->all_runtime / NSEC_PER_MSEC, sched->all_count);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002786
2787 printf(" ---------------------------------------------------\n");
2788
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002789 print_bad_events(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002790 printf("\n");
2791
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03002792 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002793}
2794
Jiri Olsa99623c62016-04-12 15:29:26 +02002795static int setup_map_cpus(struct perf_sched *sched)
2796{
Jiri Olsa73643bb2016-04-12 15:29:31 +02002797 struct cpu_map *map;
2798
Jiri Olsa99623c62016-04-12 15:29:26 +02002799 sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF);
2800
2801 if (sched->map.comp) {
2802 sched->map.comp_cpus = zalloc(sched->max_cpu * sizeof(int));
Jiri Olsacf294f22016-04-12 15:29:30 +02002803 if (!sched->map.comp_cpus)
2804 return -1;
Jiri Olsa99623c62016-04-12 15:29:26 +02002805 }
2806
Jiri Olsa73643bb2016-04-12 15:29:31 +02002807 if (!sched->map.cpus_str)
2808 return 0;
2809
2810 map = cpu_map__new(sched->map.cpus_str);
2811 if (!map) {
2812 pr_err("failed to get cpus map from %s\n", sched->map.cpus_str);
2813 return -1;
2814 }
2815
2816 sched->map.cpus = map;
Jiri Olsa99623c62016-04-12 15:29:26 +02002817 return 0;
2818}
2819
Jiri Olsaa151a372016-04-12 15:29:29 +02002820static int setup_color_pids(struct perf_sched *sched)
2821{
2822 struct thread_map *map;
2823
2824 if (!sched->map.color_pids_str)
2825 return 0;
2826
2827 map = thread_map__new_by_tid_str(sched->map.color_pids_str);
2828 if (!map) {
2829 pr_err("failed to get thread map from %s\n", sched->map.color_pids_str);
2830 return -1;
2831 }
2832
2833 sched->map.color_pids = map;
2834 return 0;
2835}
2836
Jiri Olsacf294f22016-04-12 15:29:30 +02002837static int setup_color_cpus(struct perf_sched *sched)
2838{
2839 struct cpu_map *map;
2840
2841 if (!sched->map.color_cpus_str)
2842 return 0;
2843
2844 map = cpu_map__new(sched->map.color_cpus_str);
2845 if (!map) {
2846 pr_err("failed to get thread map from %s\n", sched->map.color_cpus_str);
2847 return -1;
2848 }
2849
2850 sched->map.color_cpus = map;
2851 return 0;
2852}
2853
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002854static int perf_sched__map(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002855{
Jiri Olsa99623c62016-04-12 15:29:26 +02002856 if (setup_map_cpus(sched))
2857 return -1;
Ingo Molnar40749d02009-09-17 18:24:55 +02002858
Jiri Olsaa151a372016-04-12 15:29:29 +02002859 if (setup_color_pids(sched))
2860 return -1;
2861
Jiri Olsacf294f22016-04-12 15:29:30 +02002862 if (setup_color_cpus(sched))
2863 return -1;
2864
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002865 setup_pager();
Arnaldo Carvalho de Meloae536ac2015-03-02 22:28:41 -03002866 if (perf_sched__read_events(sched))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03002867 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002868 print_bad_events(sched);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03002869 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002870}
2871
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002872static int perf_sched__replay(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002873{
2874 unsigned long i;
2875
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002876 calibrate_run_measurement_overhead(sched);
2877 calibrate_sleep_measurement_overhead(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002878
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002879 test_calibrations(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002880
Arnaldo Carvalho de Meloae536ac2015-03-02 22:28:41 -03002881 if (perf_sched__read_events(sched))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03002882 return -1;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002883
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002884 printf("nr_run_events: %ld\n", sched->nr_run_events);
2885 printf("nr_sleep_events: %ld\n", sched->nr_sleep_events);
2886 printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002887
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002888 if (sched->targetless_wakeups)
2889 printf("target-less wakeups: %ld\n", sched->targetless_wakeups);
2890 if (sched->multitarget_wakeups)
2891 printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups);
2892 if (sched->nr_run_events_optimized)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002893 printf("run atoms optimized: %ld\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002894 sched->nr_run_events_optimized);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002895
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002896 print_task_traces(sched);
2897 add_cross_task_wakeups(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002898
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002899 create_tasks(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002900 printf("------------------------------------------------------------\n");
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002901 for (i = 0; i < sched->replay_repeat; i++)
2902 run_one_test(sched);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03002903
2904 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02002905}
2906
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002907static void setup_sorting(struct perf_sched *sched, const struct option *options,
2908 const char * const usage_msg[])
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02002909{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002910 char *tmp, *tok, *str = strdup(sched->sort_order);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02002911
2912 for (tok = strtok_r(str, ", ", &tmp);
2913 tok; tok = strtok_r(NULL, ", ", &tmp)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002914 if (sort_dimension__add(tok, &sched->sort_list) < 0) {
Namhyung Kimc7118362015-10-25 00:49:27 +09002915 usage_with_options_msg(usage_msg, options,
2916 "Unknown --sort key: `%s'", tok);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02002917 }
2918 }
2919
2920 free(str);
2921
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002922 sort_dimension__add("pid", &sched->cmp_pid);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02002923}
2924
Ingo Molnar1fc35b22009-09-13 09:44:29 +02002925static int __cmd_record(int argc, const char **argv)
2926{
2927 unsigned int rec_argc, i, j;
2928 const char **rec_argv;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002929 const char * const record_args[] = {
2930 "record",
2931 "-a",
2932 "-R",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002933 "-m", "1024",
2934 "-c", "1",
2935 "-e", "sched:sched_switch",
2936 "-e", "sched:sched_stat_wait",
2937 "-e", "sched:sched_stat_sleep",
2938 "-e", "sched:sched_stat_iowait",
2939 "-e", "sched:sched_stat_runtime",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002940 "-e", "sched:sched_process_fork",
2941 "-e", "sched:sched_wakeup",
Dongsheng7fff9592014-05-05 16:05:53 +09002942 "-e", "sched:sched_wakeup_new",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002943 "-e", "sched:sched_migrate_task",
2944 };
Ingo Molnar1fc35b22009-09-13 09:44:29 +02002945
2946 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
2947 rec_argv = calloc(rec_argc + 1, sizeof(char *));
2948
Arnaldo Carvalho de Meloe462dc52011-01-10 10:48:47 -02002949 if (rec_argv == NULL)
Chris Samuelce47dc52010-11-13 13:35:06 +11002950 return -ENOMEM;
2951
Ingo Molnar1fc35b22009-09-13 09:44:29 +02002952 for (i = 0; i < ARRAY_SIZE(record_args); i++)
2953 rec_argv[i] = strdup(record_args[i]);
2954
2955 for (j = 1; j < (unsigned int)argc; j++, i++)
2956 rec_argv[i] = argv[j];
2957
2958 BUG_ON(i != rec_argc);
2959
2960 return cmd_record(i, rec_argv, NULL);
2961}
2962
Irina Tirdea1d037ca2012-09-11 01:15:03 +03002963int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
Ingo Molnar0a02ad92009-09-11 12:12:54 +02002964{
Adrian Hunter8a39df82013-10-22 10:34:15 +03002965 const char default_sort_order[] = "avg, max, switch, runtime";
2966 struct perf_sched sched = {
2967 .tool = {
2968 .sample = perf_sched__process_tracepoint_sample,
2969 .comm = perf_event__process_comm,
2970 .lost = perf_event__process_lost,
2971 .fork = perf_sched__process_fork_event,
Jiri Olsa0a8cb852014-07-06 14:18:21 +02002972 .ordered_events = true,
Adrian Hunter8a39df82013-10-22 10:34:15 +03002973 },
2974 .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid),
2975 .sort_list = LIST_HEAD_INIT(sched.sort_list),
2976 .start_work_mutex = PTHREAD_MUTEX_INITIALIZER,
2977 .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER,
Adrian Hunter8a39df82013-10-22 10:34:15 +03002978 .sort_order = default_sort_order,
2979 .replay_repeat = 10,
2980 .profile_cpu = -1,
2981 .next_shortname1 = 'A',
2982 .next_shortname2 = '0',
Josef Bacik2f80dd42015-05-22 09:18:40 -04002983 .skip_merge = 0,
David Ahern6c973c92016-11-16 15:06:32 +09002984 .show_callchain = 1,
2985 .max_stack = 5,
Adrian Hunter8a39df82013-10-22 10:34:15 +03002986 };
Namhyung Kim77f02f42016-10-24 12:00:03 +09002987 const struct option sched_options[] = {
2988 OPT_STRING('i', "input", &input_name, "file",
2989 "input file name"),
2990 OPT_INCR('v', "verbose", &verbose,
2991 "be more verbose (show symbol address, etc)"),
2992 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
2993 "dump raw trace in ASCII"),
Namhyung Kim6fa94252016-12-06 12:40:01 +09002994 OPT_BOOLEAN('f', "force", &sched.force, "don't complain, do it"),
Namhyung Kim77f02f42016-10-24 12:00:03 +09002995 OPT_END()
2996 };
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03002997 const struct option latency_options[] = {
2998 OPT_STRING('s', "sort", &sched.sort_order, "key[,key2...]",
2999 "sort by key(s): runtime, switch, avg, max"),
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003000 OPT_INTEGER('C', "CPU", &sched.profile_cpu,
3001 "CPU to profile on"),
Josef Bacik2f80dd42015-05-22 09:18:40 -04003002 OPT_BOOLEAN('p', "pids", &sched.skip_merge,
3003 "latency stats per pid instead of per comm"),
Namhyung Kim77f02f42016-10-24 12:00:03 +09003004 OPT_PARENT(sched_options)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003005 };
3006 const struct option replay_options[] = {
3007 OPT_UINTEGER('r', "repeat", &sched.replay_repeat,
3008 "repeat the workload replay N times (-1: infinite)"),
Namhyung Kim77f02f42016-10-24 12:00:03 +09003009 OPT_PARENT(sched_options)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003010 };
Jiri Olsa99623c62016-04-12 15:29:26 +02003011 const struct option map_options[] = {
3012 OPT_BOOLEAN(0, "compact", &sched.map.comp,
3013 "map output in compact mode"),
Jiri Olsaa151a372016-04-12 15:29:29 +02003014 OPT_STRING(0, "color-pids", &sched.map.color_pids_str, "pids",
3015 "highlight given pids in map"),
Jiri Olsacf294f22016-04-12 15:29:30 +02003016 OPT_STRING(0, "color-cpus", &sched.map.color_cpus_str, "cpus",
3017 "highlight given CPUs in map"),
Jiri Olsa73643bb2016-04-12 15:29:31 +02003018 OPT_STRING(0, "cpus", &sched.map.cpus_str, "cpus",
3019 "display given CPUs in map"),
Namhyung Kim77f02f42016-10-24 12:00:03 +09003020 OPT_PARENT(sched_options)
Jiri Olsa99623c62016-04-12 15:29:26 +02003021 };
David Ahern49394a22016-11-16 15:06:29 +09003022 const struct option timehist_options[] = {
3023 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
3024 "file", "vmlinux pathname"),
3025 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
3026 "file", "kallsyms pathname"),
David Ahern6c973c92016-11-16 15:06:32 +09003027 OPT_BOOLEAN('g', "call-graph", &sched.show_callchain,
3028 "Display call chains if present (default on)"),
3029 OPT_UINTEGER(0, "max-stack", &sched.max_stack,
3030 "Maximum number of functions to display backtrace."),
David Ahern49394a22016-11-16 15:06:29 +09003031 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
3032 "Look for files with symbols relative to this directory"),
David Ahern52df1382016-11-16 15:06:30 +09003033 OPT_BOOLEAN('s', "summary", &sched.summary_only,
3034 "Show only syscall summary with statistics"),
3035 OPT_BOOLEAN('S', "with-summary", &sched.summary,
3036 "Show all syscalls and summary with statistics"),
David Ahernfc1469f2016-11-16 15:06:31 +09003037 OPT_BOOLEAN('w', "wakeups", &sched.show_wakeups, "Show wakeup events"),
David Ahern350f54f2016-11-25 09:28:41 -07003038 OPT_BOOLEAN('M', "migrations", &sched.show_migrations, "Show migration events"),
David Aherna407b062016-11-16 15:06:33 +09003039 OPT_BOOLEAN('V', "cpu-visual", &sched.show_cpu_visual, "Add CPU visual"),
David Ahern853b7402016-11-29 10:15:44 -07003040 OPT_STRING(0, "time", &sched.time_str, "str",
3041 "Time span for analysis (start,stop)"),
David Ahern49394a22016-11-16 15:06:29 +09003042 OPT_PARENT(sched_options)
3043 };
3044
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003045 const char * const latency_usage[] = {
3046 "perf sched latency [<options>]",
3047 NULL
3048 };
3049 const char * const replay_usage[] = {
3050 "perf sched replay [<options>]",
3051 NULL
3052 };
Jiri Olsa99623c62016-04-12 15:29:26 +02003053 const char * const map_usage[] = {
3054 "perf sched map [<options>]",
3055 NULL
3056 };
David Ahern49394a22016-11-16 15:06:29 +09003057 const char * const timehist_usage[] = {
3058 "perf sched timehist [<options>]",
3059 NULL
3060 };
Ramkumar Ramachandraa83edb22014-03-14 23:17:54 -04003061 const char *const sched_subcommands[] = { "record", "latency", "map",
David Ahern49394a22016-11-16 15:06:29 +09003062 "replay", "script",
3063 "timehist", NULL };
Ramkumar Ramachandraa83edb22014-03-14 23:17:54 -04003064 const char *sched_usage[] = {
3065 NULL,
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003066 NULL
3067 };
3068 struct trace_sched_handler lat_ops = {
3069 .wakeup_event = latency_wakeup_event,
3070 .switch_event = latency_switch_event,
3071 .runtime_event = latency_runtime_event,
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003072 .migrate_task_event = latency_migrate_task_event,
3073 };
3074 struct trace_sched_handler map_ops = {
3075 .switch_event = map_switch_event,
3076 };
3077 struct trace_sched_handler replay_ops = {
3078 .wakeup_event = replay_wakeup_event,
3079 .switch_event = replay_switch_event,
3080 .fork_event = replay_fork_event,
3081 };
Adrian Hunter156a2b02013-10-22 10:34:16 +03003082 unsigned int i;
3083
3084 for (i = 0; i < ARRAY_SIZE(sched.curr_pid); i++)
3085 sched.curr_pid[i] = -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003086
Ramkumar Ramachandraa83edb22014-03-14 23:17:54 -04003087 argc = parse_options_subcommand(argc, argv, sched_options, sched_subcommands,
3088 sched_usage, PARSE_OPT_STOP_AT_NON_OPTION);
Ingo Molnarf2858d82009-09-11 12:12:54 +02003089 if (!argc)
3090 usage_with_options(sched_usage, sched_options);
3091
Xiao Guangrongc0777c52009-12-07 12:04:49 +08003092 /*
Ingo Molnar133dc4c2010-11-16 18:45:39 +01003093 * Aliased to 'perf script' for now:
Xiao Guangrongc0777c52009-12-07 12:04:49 +08003094 */
Ingo Molnar133dc4c2010-11-16 18:45:39 +01003095 if (!strcmp(argv[0], "script"))
3096 return cmd_script(argc, argv, prefix);
Xiao Guangrongc0777c52009-12-07 12:04:49 +08003097
Ingo Molnar1fc35b22009-09-13 09:44:29 +02003098 if (!strncmp(argv[0], "rec", 3)) {
3099 return __cmd_record(argc, argv);
3100 } else if (!strncmp(argv[0], "lat", 3)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003101 sched.tp_handler = &lat_ops;
Ingo Molnarf2858d82009-09-11 12:12:54 +02003102 if (argc > 1) {
3103 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
3104 if (argc)
3105 usage_with_options(latency_usage, latency_options);
Ingo Molnarf2858d82009-09-11 12:12:54 +02003106 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003107 setup_sorting(&sched, latency_options, latency_usage);
3108 return perf_sched__lat(&sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02003109 } else if (!strcmp(argv[0], "map")) {
Jiri Olsa99623c62016-04-12 15:29:26 +02003110 if (argc) {
Jiri Olsaa151a372016-04-12 15:29:29 +02003111 argc = parse_options(argc, argv, map_options, map_usage, 0);
Jiri Olsa99623c62016-04-12 15:29:26 +02003112 if (argc)
3113 usage_with_options(map_usage, map_options);
3114 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003115 sched.tp_handler = &map_ops;
3116 setup_sorting(&sched, latency_options, latency_usage);
3117 return perf_sched__map(&sched);
Ingo Molnarf2858d82009-09-11 12:12:54 +02003118 } else if (!strncmp(argv[0], "rep", 3)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003119 sched.tp_handler = &replay_ops;
Ingo Molnarf2858d82009-09-11 12:12:54 +02003120 if (argc) {
3121 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
3122 if (argc)
3123 usage_with_options(replay_usage, replay_options);
3124 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03003125 return perf_sched__replay(&sched);
David Ahern49394a22016-11-16 15:06:29 +09003126 } else if (!strcmp(argv[0], "timehist")) {
3127 if (argc) {
3128 argc = parse_options(argc, argv, timehist_options,
3129 timehist_usage, 0);
3130 if (argc)
3131 usage_with_options(timehist_usage, timehist_options);
3132 }
David Ahernfc1469f2016-11-16 15:06:31 +09003133 if (sched.show_wakeups && sched.summary_only) {
3134 pr_err(" Error: -s and -w are mutually exclusive.\n");
3135 parse_options_usage(timehist_usage, timehist_options, "s", true);
3136 parse_options_usage(NULL, timehist_options, "w", true);
3137 return -EINVAL;
3138 }
3139
David Ahern49394a22016-11-16 15:06:29 +09003140 return perf_sched__timehist(&sched);
Ingo Molnarf2858d82009-09-11 12:12:54 +02003141 } else {
3142 usage_with_options(sched_usage, sched_options);
Ingo Molnar0a02ad92009-09-11 12:12:54 +02003143 }
3144
Ingo Molnarec156762009-09-11 12:12:54 +02003145 return 0;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02003146}