Messages in this thread Patch in this message | | | From | Namhyung Kim <> | Subject | [PATCH 1/2] libperf: Add perf_evlist__reset_id_hash() | Date | Wed, 24 Feb 2021 17:11:02 +0900 |
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Add the perf_evlist__reset_id_hash() function to libperf API so that it can be called to reset the hash table. This is necessary for perf stat to run the workload multiple times.
Signed-off-by: Namhyung Kim <namhyung@kernel.org> --- tools/lib/perf/evlist.c | 13 +++++++++---- tools/lib/perf/include/perf/evlist.h | 2 ++ tools/lib/perf/libperf.map | 1 + 3 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c index 17465d454a0e..a0aaf385cbb5 100644 --- a/tools/lib/perf/evlist.c +++ b/tools/lib/perf/evlist.c @@ -26,13 +26,10 @@ void perf_evlist__init(struct perf_evlist *evlist) { - int i; - - for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) - INIT_HLIST_HEAD(&evlist->heads[i]); INIT_LIST_HEAD(&evlist->entries); evlist->nr_entries = 0; fdarray__init(&evlist->pollfd, 64); + perf_evlist__reset_id_hash(evlist); } static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, @@ -237,6 +234,14 @@ static void perf_evlist__id_hash(struct perf_evlist *evlist, hlist_add_head(&sid->node, &evlist->heads[hash]); } +void perf_evlist__reset_id_hash(struct perf_evlist *evlist) +{ + int i; + + for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) + INIT_HLIST_HEAD(&evlist->heads[i]); +} + void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, int cpu, int thread, u64 id) diff --git a/tools/lib/perf/include/perf/evlist.h b/tools/lib/perf/include/perf/evlist.h index 0a7479dc13bf..0085732e8cd9 100644 --- a/tools/lib/perf/include/perf/evlist.h +++ b/tools/lib/perf/include/perf/evlist.h @@ -46,4 +46,6 @@ 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__reset_id_hash(struct perf_evlist *evlist); + #endif /* __LIBPERF_EVLIST_H */ diff --git a/tools/lib/perf/libperf.map b/tools/lib/perf/libperf.map index 7be1af8a546c..285100143d89 100644 --- a/tools/lib/perf/libperf.map +++ b/tools/lib/perf/libperf.map @@ -42,6 +42,7 @@ LIBPERF_0.0.1 { perf_evlist__munmap; perf_evlist__filter_pollfd; perf_evlist__next_mmap; + perf_evlist__reset_id_hash; perf_mmap__consume; perf_mmap__read_init; perf_mmap__read_done; -- 2.30.0.617.g56c4b15f3c-goog
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