perf tools: Add time conversion event
Intel PT uses the time members from the perf_event_mmap_page to convert
between TSC and perf time.
Due to a lack of foresight when Intel PT was implemented, those time
members were recorded in the (implementation dependent) AUXTRACE_INFO
event, the structure of which is generally inaccessible outside of the
Intel PT decoder. However now the conversion between TSC and perf time
is needed when processing a jitdump file when Intel PT has been used for
tracing.
So add a user event to record the time members. 'perf record' will
synthesize the event if the information is available. And session
processing will put a copy of the event on the session so that tools
like 'perf inject' can easily access it.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1457426324-30158-1-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 6bb1c92..8d363d5 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -233,6 +233,7 @@
PERF_RECORD_STAT = 76,
PERF_RECORD_STAT_ROUND = 77,
PERF_RECORD_EVENT_UPDATE = 78,
+ PERF_RECORD_TIME_CONV = 79,
PERF_RECORD_HEADER_MAX
};
@@ -469,6 +470,13 @@
u64 time;
};
+struct time_conv_event {
+ struct perf_event_header header;
+ u64 time_shift;
+ u64 time_mult;
+ u64 time_zero;
+};
+
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@@ -497,6 +505,7 @@
struct stat_config_event stat_config;
struct stat_event stat;
struct stat_round_event stat_round;
+ struct time_conv_event time_conv;
};
void perf_event__print_totals(void);