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perf session: Warn when AUX data has been lost

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By default 'perf record' will postprocess the perf.data file to
determine build-ids.  When that happens, the number of lost perf events
is displayed.

Make that also happen for AUX events.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1443186956-18718-7-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Adrian Hunter 2015-09-25 16:15:37 +03:00 committed by Arnaldo Carvalho de Melo
parent 83e1986032
commit a38f48e300
2 changed files with 11 additions and 0 deletions
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1
tools/perf/util/event.h
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@ -257,6 +257,7 @@ struct events_stats {
u64 total_non_filtered_period;
u64 total_lost;
u64 total_lost_samples;
u64 total_aux_lost;
u64 total_invalid_chains;
u32 nr_events[PERF_RECORD_HEADER_MAX];
u32 nr_non_filtered_samples;

10
tools/perf/util/session.c
View File

@ -1101,6 +1101,9 @@ static int machines__deliver_event(struct machines *machines,
case PERF_RECORD_UNTHROTTLE:
return tool->unthrottle(tool, event, sample, machine);
case PERF_RECORD_AUX:
if (tool->aux == perf_event__process_aux &&
(event->aux.flags & PERF_AUX_FLAG_TRUNCATED))
evlist->stats.total_aux_lost += 1;
return tool->aux(tool, event, sample, machine);
case PERF_RECORD_ITRACE_START:
return tool->itrace_start(tool, event, sample, machine);
@ -1346,6 +1349,13 @@ static void perf_session__warn_about_errors(const struct perf_session *session)
}
}
if (session->tool->aux == perf_event__process_aux &&
stats->total_aux_lost != 0) {
ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
stats->total_aux_lost,
stats->nr_events[PERF_RECORD_AUX]);
}
if (stats->nr_unknown_events != 0) {
ui__warning("Found %u unknown events!\n\n"
"Is this an older tool processing a perf.data "