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Commit a465f3c3 authored by Mathieu Poirier's avatar Mathieu Poirier Committed by Arnaldo Carvalho de Melo
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perf cs-etm: Add handling of itrace start events 



Add handling of ITRACE events in order to add the tid/pid of the
executing process to the perf tools machine infrastructure.  This
information is later retrieved when a contextID packet is found in the
trace stream.

Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: default avatarLeo 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/20190524173508.29044-5-mathieu.poirier@linaro.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e5993c42

tools/perf/util/cs-etm.c

+26 −0
Original line number Diff line number Diff line
@@ -1657,6 +1657,29 @@ static int cs_etm__process_timeless_queues(struct cs_etm_auxtrace *etm, 
	return 0;

}



static int cs_etm__process_itrace_start(struct cs_etm_auxtrace *etm,

					union perf_event *event)

{

	struct thread *th;



	if (etm->timeless_decoding)

		return 0;



	/*

	 * Add the tid/pid to the log so that we can get a match when

	 * we get a contextID from the decoder.

	 */

	th = machine__findnew_thread(etm->machine,

				     event->itrace_start.pid,

				     event->itrace_start.tid);

	if (!th)

		return -ENOMEM;



	thread__put(th);



	return 0;

}



static int cs_etm__process_event(struct perf_session *session,

				 union perf_event *event,

				 struct perf_sample *sample,
@@ -1694,6 +1717,9 @@ static int cs_etm__process_event(struct perf_session *session, 
		return cs_etm__process_timeless_queues(etm,

						       event->fork.tid);



	if (event->header.type == PERF_RECORD_ITRACE_START)

		return cs_etm__process_itrace_start(etm, event);



	return 0;

}