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authorAdrian Hunter2015-04-30 16:37:29 +0200
committerArnaldo Carvalho de Melo2015-05-05 23:12:57 +0200
commit4a96f7a02eb52b1b618ab610e689bd82770f00b0 (patch)
tree13ff6ebf629e6b024daf0c8ea1da3e7b65b636cd /tools/perf/util/machine.c
parentperf auxtrace: Add option to synthesize events for transactions (diff)
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perf tools: Add support for PERF_RECORD_AUX
Add support for the PERF_RECORD_AUX event type. PERF_RECORD_AUX is a new kernel event that records when new data lands in the AUX buffer. Currently it is assumed that AUX data follows the same ring buffer conventions used by the perf events buffer, and consequently the AUX event is not processed during recording. It is processed during session processing so that the information in the 'flags' member is made available. The format of PERF_RECORD_AUX is outlined in the linux/perf_events.h header file. The 'flags' are also enumerated. Intel PT and Intel BTS use the flag named PERF_AUX_FLAG_TRUNCATED to determine if data has been lost because the buffer became full as perf was not able to empty it fast enough. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1430404667-10593-7-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/machine.c')
-rw-r--r--tools/perf/util/machine.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 527e032e24f6..a7ad51100b55 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -486,6 +486,14 @@ machine__module_dso(struct machine *machine, struct kmod_path *m,
return dso;
}
+int machine__process_aux_event(struct machine *machine __maybe_unused,
+ union perf_event *event)
+{
+ if (dump_trace)
+ perf_event__fprintf_aux(event, stdout);
+ return 0;
+}
+
struct map *machine__new_module(struct machine *machine, u64 start,
const char *filename)
{
@@ -1331,6 +1339,8 @@ int machine__process_event(struct machine *machine, union perf_event *event,
ret = machine__process_exit_event(machine, event, sample); break;
case PERF_RECORD_LOST:
ret = machine__process_lost_event(machine, event, sample); break;
+ case PERF_RECORD_AUX:
+ ret = machine__process_aux_event(machine, event); break;
default:
ret = -1;
break;