perf session: Warn when AUX data has been lost
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>
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index be5cbc7..a0dbcbd 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -257,6 +257,7 @@
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;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index f5e0000..15c84ca 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1101,6 +1101,9 @@
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 @@
}
}
+ 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 "