diff options
author | Ian Rogers <irogers@google.com> | 2023-03-11 18:15:38 -0800 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2023-03-13 17:42:02 -0300 |
commit | 7abf0bccaaec77043358ee07e694d31cf9a7dd76 (patch) | |
tree | 0eac2cd6ec9040bf0bad90e0d52db46a5d530f8c | |
parent | c6d616fe10c62f528c8c52663aec338d2f4ee4c3 (diff) | |
download | lwn-7abf0bccaaec77043358ee07e694d31cf9a7dd76.tar.gz lwn-7abf0bccaaec77043358ee07e694d31cf9a7dd76.zip |
perf evsel: Add function to compute group PMU name
The computed name respects software events and aux event groups, such
that the pmu_name is changed to be that of the aux event leader or
group leader for software events. This is done as a later change will
split events that are in different PMUs into different groups.
Committer notes:
Added a stub for this new function so that 'perf test python' passes.
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kim Phillips <kim.phillips@amd.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20230312021543.3060328-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r-- | tools/perf/util/evsel.c | 24 | ||||
-rw-r--r-- | tools/perf/util/evsel.h | 1 | ||||
-rw-r--r-- | tools/perf/util/python.c | 5 |
3 files changed, 30 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 798f072b2763..3dda8a25cf50 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -821,6 +821,30 @@ out_unknown: return "unknown"; } +const char *evsel__group_pmu_name(const struct evsel *evsel) +{ + const struct evsel *leader; + + /* If the pmu_name is set use it. pmu_name isn't set for CPU and software events. */ + if (evsel->pmu_name) + return evsel->pmu_name; + /* + * Software events may be in a group with other uncore PMU events. Use + * the pmu_name of the group leader to avoid breaking the software event + * out of the group. + * + * Aux event leaders, like intel_pt, expect a group with events from + * other PMUs, so substitute the AUX event's PMU in this case. + */ + leader = evsel__leader(evsel); + if ((evsel->core.attr.type == PERF_TYPE_SOFTWARE || evsel__is_aux_event(leader)) && + leader->pmu_name) { + return leader->pmu_name; + } + + return "cpu"; +} + const char *evsel__metric_id(const struct evsel *evsel) { if (evsel->metric_id) diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 676c499323e9..d26745ca6147 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -280,6 +280,7 @@ int arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size); int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size); const char *evsel__name(struct evsel *evsel); +const char *evsel__group_pmu_name(const struct evsel *evsel); const char *evsel__metric_id(const struct evsel *evsel); static inline bool evsel__is_tool(const struct evsel *evsel) diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c index ab48ffbb6448..be336f1b2b68 100644 --- a/tools/perf/util/python.c +++ b/tools/perf/util/python.c @@ -93,6 +93,11 @@ int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, return EOF; } +bool evsel__is_aux_event(const struct evsel *evsel __maybe_unused) +{ + return false; +} + /* * Add this one here not to drag util/metricgroup.c */ |