[PATCH v2 04/17] perf tools: Add handling of itrace start events
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: 2019-05-24 17:36:41
Also in:
lkml
Subsystem:
arm/coresight framework and drivers, performance events subsystem, performance events tooling arm64, the rest · Maintainers:
Suzuki K Poulose, Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds
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: Mathieu Poirier <mathieu.poirier@linaro.org> --- tools/perf/util/cs-etm.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index de488b43f440..0742c50fce46 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c@@ -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; }
--
2.17.1
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