[39/85] perf cs-etm: Configure SWITCH_EVENTS in CPU-wide mode

Message ID 20190611185911.11645-40-acme@kernel.org
State New
Headers show
Series
  • Untitled series #21018
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Commit Message

Arnaldo Carvalho de Melo June 11, 2019, 6:58 p.m.
From: Mathieu Poirier <mathieu.poirier@linaro.org>


Ask the perf core to generate an event when processes are swapped in/out
of context.  That way proper action can be taken by the decoding code
when faced with such event.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Tested-by: Leo Yan <leo.yan@linaro.org>

Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190524173508.29044-4-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

---
 tools/perf/arch/arm/util/cs-etm.c | 3 +++
 1 file changed, 3 insertions(+)

-- 
2.20.1

Patch

diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c
index be1e4f20affa..cc7f1cd23b14 100644
--- a/tools/perf/arch/arm/util/cs-etm.c
+++ b/tools/perf/arch/arm/util/cs-etm.c
@@ -257,6 +257,9 @@  static int cs_etm_recording_options(struct auxtrace_record *itr,
 	ptr->evlist = evlist;
 	ptr->snapshot_mode = opts->auxtrace_snapshot_mode;
 
+	if (perf_can_record_switch_events())
+		opts->record_switch_events = true;
+
 	evlist__for_each_entry(evlist, evsel) {
 		if (evsel->attr.type == cs_etm_pmu->type) {
 			if (cs_etm_evsel) {