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perf evlist: Add perf_evlist__go_system_wide() helper 

commit f6ff1c7604 upstream.

For dummy events that keep tracking, we may need to modify its cpu_maps.

For example, change the cpu_maps to record sideband events for all CPUS.

Add perf_evlist__go_system_wide() helper to support this scenario.

Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Link: https://lore.kernel.org/r/20230904023340.12707-2-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Yang Jihong 2023-09-04 02:33:35 +00:00 committed by Greg Kroah-Hartman
parent 95e33c0f61
commit f33052802e
2 changed files with 11 additions and 0 deletions
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9
tools/lib/perf/evlist.c
View File

@ -744,3 +744,12 @@ int perf_evlist__nr_groups(struct perf_evlist *evlist)
}
return nr_groups;
}
void perf_evlist__go_system_wide(struct perf_evlist *evlist, struct perf_evsel *evsel)
{
if (!evsel->system_wide) {
evsel->system_wide = true;
if (evlist->needs_map_propagation)
__perf_evlist__propagate_maps(evlist, evsel);
}
}

2
tools/lib/perf/include/internal/evlist.h
View File

@ -135,4 +135,6 @@ int perf_evlist__id_add_fd(struct perf_evlist *evlist,
void perf_evlist__reset_id_hash(struct perf_evlist *evlist);
void __perf_evlist__set_leader(struct list_head *list, struct perf_evsel *leader);
void perf_evlist__go_system_wide(struct perf_evlist *evlist, struct perf_evsel *evsel);
#endif /* __LIBPERF_INTERNAL_EVLIST_H */