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>

1 files changed, 9 insertions, 0 deletions

diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 6bb1c928350d..8d363d5e65a2 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -233,6 +233,7 @@ enum perf_user_event_type { /* above any possible kernel type */
 	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 @@ struct stat_round_event {
 	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 @@ union perf_event {
 	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);