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perf: cs-etm: Optimize option setup for CPU-wide sessions

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Call function cs_etm_set_option() once with all relevant options set
rather than multiple times to avoid going through the list of CPU more
than once.

Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@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: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20190611204528.20093-1-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Mathieu Poirier 2019-06-11 14:45:28 -06:00 committed by Arnaldo Carvalho de Melo
parent 010e3e8fc1
commit 374d910f87
1 changed files with 8 additions and 12 deletions
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20
tools/perf/arch/arm/util/cs-etm.c
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@ -162,20 +162,19 @@ static int cs_etm_set_option(struct auxtrace_record *itr,
!cpu_map__has(online_cpus, i))
continue;
switch (option) {
case ETM_OPT_CTXTID:
if (option & ETM_OPT_CTXTID) {
err = cs_etm_set_context_id(itr, evsel, i);
if (err)
goto out;
break;
case ETM_OPT_TS:
}
if (option & ETM_OPT_TS) {
err = cs_etm_set_timestamp(itr, evsel, i);
if (err)
goto out;
break;
default:
goto out;
}
if (option & ~(ETM_OPT_CTXTID | ETM_OPT_TS))
/* Nothing else is currently supported */
goto out;
}
err = 0;
@ -398,11 +397,8 @@ static int cs_etm_recording_options(struct auxtrace_record *itr,
if (!cpu_map__empty(cpus)) {
perf_evsel__set_sample_bit(cs_etm_evsel, CPU);
err = cs_etm_set_option(itr, cs_etm_evsel, ETM_OPT_CTXTID);
if (err)
goto out;
err = cs_etm_set_option(itr, cs_etm_evsel, ETM_OPT_TS);
err = cs_etm_set_option(itr, cs_etm_evsel,
ETM_OPT_CTXTID | ETM_OPT_TS);
if (err)
goto out;
}