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| author | German Gomez <german.gomez@arm.com> | 2021-11-11 13:36:23 +0000 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2021-11-13 18:11:50 -0300 |
| commit | 455c988225c7eee84c7a2f86984404825a1830bb (patch) | |
| tree | b7614e611c531559d926721cf83f9c27a955bbff /tools | |
| parent | 9dc9855f18ba25d2bc536ea5ba6682855e385d66 (diff) | |
| download | linux-455c988225c7eee84c7a2f86984404825a1830bb.tar.gz linux-455c988225c7eee84c7a2f86984404825a1830bb.tar.bz2 linux-455c988225c7eee84c7a2f86984404825a1830bb.zip | |
perf arm-spe: Update --switch-events docs in 'perf record'
Update 'perf record' docs and ARM SPE recording options so that they are
consistent. This includes supporting the --no-switch-events flag in ARM
SPE as well.
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: German Gomez <german.gomez@arm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Will Deacon <will@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20211111133625.193568-3-german.gomez@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 2 | ||||
| -rw-r--r-- | tools/perf/arch/arm64/util/arm-spe.c | 4 |
2 files changed, 4 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 2d7df8703cf2..3cf7bac67239 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -469,7 +469,7 @@ This option sets the time out limit. The default value is 500 ms. --switch-events:: Record context switch events i.e. events of type PERF_RECORD_SWITCH or -PERF_RECORD_SWITCH_CPU_WIDE. In some cases (e.g. Intel PT or CoreSight) +PERF_RECORD_SWITCH_CPU_WIDE. In some cases (e.g. Intel PT, CoreSight or Arm SPE) switch events will be enabled automatically, which can be suppressed by by the option --no-switch-events. diff --git a/tools/perf/arch/arm64/util/arm-spe.c b/tools/perf/arch/arm64/util/arm-spe.c index d32431ac15cc..2100d46ccf5e 100644 --- a/tools/perf/arch/arm64/util/arm-spe.c +++ b/tools/perf/arch/arm64/util/arm-spe.c @@ -254,8 +254,10 @@ static int arm_spe_recording_options(struct auxtrace_record *itr, if (!perf_cpu_map__empty(cpus)) { evsel__set_sample_bit(tracking_evsel, TIME); evsel__set_sample_bit(tracking_evsel, CPU); + /* also track task context switch */ - tracking_evsel->core.attr.context_switch = 1; + if (!record_opts__no_switch_events(opts)) + tracking_evsel->core.attr.context_switch = 1; } return 0; |