perf evsel: Know if byte swap is needed
Instead of passing it around for parsing as an explicit parameter, will
help with reading tracepoint fields when not using a perf session or
pevent structure, i.e. for non perf.data centered workflows.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-qa67ikv2sm49cwa7dyjhhp6g@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c
index 78b47a75..2fd2c03 100644
--- a/tools/perf/builtin-test.c
+++ b/tools/perf/builtin-test.c
@@ -564,7 +564,7 @@
goto out_munmap;
}
- err = perf_evlist__parse_sample(evlist, event, &sample, false);
+ err = perf_evlist__parse_sample(evlist, event, &sample);
if (err) {
pr_err("Can't parse sample, err = %d\n", err);
goto out_munmap;
@@ -781,7 +781,7 @@
if (type < PERF_RECORD_MAX)
nr_events[type]++;
- err = perf_evlist__parse_sample(evlist, event, &sample, false);
+ err = perf_evlist__parse_sample(evlist, event, &sample);
if (err < 0) {
if (verbose)
perf_event__fprintf(event, stderr);
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 5550754..e434a16 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -823,7 +823,7 @@
int ret;
while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
- ret = perf_evlist__parse_sample(top->evlist, event, &sample, false);
+ ret = perf_evlist__parse_sample(top->evlist, event, &sample);
if (ret) {
pr_err("Can't parse sample, err = %d\n", ret);
continue;
diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 27f6de3..704bd91 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -884,10 +884,10 @@
}
int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
- struct perf_sample *sample, bool swapped)
+ struct perf_sample *sample)
{
struct perf_evsel *evsel = perf_evlist__first(evlist);
- return perf_evsel__parse_sample(evsel, event, sample, swapped);
+ return perf_evsel__parse_sample(evsel, event, sample);
}
size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp)
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 3f2e1e4..008a957 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -125,7 +125,7 @@
u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist);
int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event,
- struct perf_sample *sample, bool swapped);
+ struct perf_sample *sample);
bool perf_evlist__valid_sample_type(struct perf_evlist *evlist);
bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist);
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 2467eaf..fe9581b 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -767,11 +767,13 @@
return __perf_evsel__open(evsel, &empty_cpu_map.map, threads);
}
-static int perf_event__parse_id_sample(const union perf_event *event, u64 type,
- struct perf_sample *sample,
- bool swapped)
+static int perf_evsel__parse_id_sample(const struct perf_evsel *evsel,
+ const union perf_event *event,
+ struct perf_sample *sample)
{
+ u64 type = evsel->attr.sample_type;
const u64 *array = event->sample.array;
+ bool swapped = evsel->needs_swap;
union u64_swap u;
array += ((event->header.size -
@@ -832,10 +834,11 @@
}
int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
- struct perf_sample *data, bool swapped)
+ struct perf_sample *data)
{
u64 type = evsel->attr.sample_type;
u64 regs_user = evsel->attr.sample_regs_user;
+ bool swapped = evsel->needs_swap;
const u64 *array;
/*
@@ -852,7 +855,7 @@
if (event->header.type != PERF_RECORD_SAMPLE) {
if (!evsel->attr.sample_id_all)
return 0;
- return perf_event__parse_id_sample(event, type, data, swapped);
+ return perf_evsel__parse_id_sample(evsel, event, data);
}
array = event->sample.array;
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index bb445d1..60d2885 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -69,6 +69,7 @@
struct cpu_map *cpus;
unsigned int sample_size;
bool supported;
+ bool needs_swap;
/* parse modifier helper */
int exclude_GH;
struct perf_evsel *leader;
@@ -205,7 +206,7 @@
void hists__init(struct hists *hists);
int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
- struct perf_sample *sample, bool swapped);
+ struct perf_sample *sample);
static inline struct perf_evsel *perf_evsel__next(struct perf_evsel *evsel)
{
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 6aae329..7daad23 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1256,8 +1256,10 @@
if (ret != (ssize_t)sizeof(nr))
goto error;
- if (ph->needs_swap)
+ if (ph->needs_swap) {
nr = bswap_32(nr);
+ evsel->needs_swap = true;
+ }
evsel->name = do_read_string(fd, ph);
@@ -2626,6 +2628,8 @@
if (evsel == NULL)
goto out_delete_evlist;
+
+ evsel->needs_swap = header->needs_swap;
/*
* Do it before so that if perf_evsel__alloc_id fails, this
* entry gets purged too at perf_evlist__delete().
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index ca85444..9181bf2 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -805,7 +805,7 @@
if (pyevent == NULL)
return PyErr_NoMemory();
- err = perf_evlist__parse_sample(evlist, event, &pevent->sample, false);
+ err = perf_evlist__parse_sample(evlist, event, &pevent->sample);
if (err)
return PyErr_Format(PyExc_OSError,
"perf: can't parse sample, err=%d", err);
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 3049b0a..8cdd232 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -722,8 +722,7 @@
if (iter->timestamp > limit)
break;
- ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample,
- s->header.needs_swap);
+ ret = perf_evlist__parse_sample(s->evlist, iter->event, &sample);
if (ret)
pr_err("Can't parse sample, err = %d\n", ret);
else {
@@ -1174,8 +1173,7 @@
/*
* For all kernel events we get the sample data
*/
- ret = perf_evlist__parse_sample(session->evlist, event, &sample,
- session->header.needs_swap);
+ ret = perf_evlist__parse_sample(session->evlist, event, &sample);
if (ret)
return ret;