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libperf: Adopt evlist__set_leader() from tools/perf as perf_evlist__set_leader()

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Move the implementation of evlist__set_leader() to a new libperf
perf_evlist__set_leader() function with the same functionality make it a
libperf exported API.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Requested-by: Shunsuke Nakamura <nakamura.shun@fujitsu.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210706151704.73662-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
2021-07-06 17:17:02 +02:00
committed by Arnaldo Carvalho de Melo
parent 3a683120d8
commit 2e6263ab54
7 changed files with 26 additions and 20 deletions
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21
tools/lib/perf/evlist.c
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@@ -642,3 +642,24 @@ perf_evlist__next_mmap(struct perf_evlist *evlist, struct perf_mmap *map,
return overwrite ? evlist->mmap_ovw_first : evlist->mmap_first;
}
void __perf_evlist__set_leader(struct list_head *list)
{
struct perf_evsel *evsel, *leader;
leader = list_entry(list->next, struct perf_evsel, node);
evsel = list_entry(list->prev, struct perf_evsel, node);
leader->nr_members = evsel->idx - leader->idx + 1;
__perf_evlist__for_each_entry(list, evsel)
evsel->leader = leader;
}
void perf_evlist__set_leader(struct perf_evlist *evlist)
{
if (evlist->nr_entries) {
evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0;
__perf_evlist__set_leader(&evlist->entries);
}
}

1
tools/lib/perf/include/internal/evlist.h
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@@ -127,4 +127,5 @@ 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);
#endif /* __LIBPERF_INTERNAL_EVLIST_H */

1
tools/lib/perf/include/perf/evlist.h
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@@ -46,4 +46,5 @@ LIBPERF_API struct perf_mmap *perf_evlist__next_mmap(struct perf_evlist *evlist,
(pos) != NULL; \
(pos) = perf_evlist__next_mmap((evlist), (pos), overwrite))
LIBPERF_API void perf_evlist__set_leader(struct perf_evlist *evlist);
#endif /* __LIBPERF_EVLIST_H */

1
tools/lib/perf/libperf.map
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@@ -45,6 +45,7 @@ LIBPERF_0.0.1 {
perf_evlist__munmap;
perf_evlist__filter_pollfd;
perf_evlist__next_mmap;
perf_evlist__set_leader;
perf_mmap__consume;
perf_mmap__read_init;
perf_mmap__read_done;