Re: [PATCH v2 1/2] libperf: Add perf_evlist__reset_id_hash()
From: Jiri Olsa
Date: Thu Feb 25 2021 - 11:17:21 EST
On Thu, Feb 25, 2021 at 12:51:47PM +0900, Namhyung Kim wrote:
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Add the perf_evlist__reset_id_hash() function as an internal function
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so that it can be called by perf to reset the hash table. This is
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necessary for perf stat to run the workload multiple times.
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Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
for the patchset
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
thanks,
jirka
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---
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tools/lib/perf/evlist.c | 13 +++++++++----
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tools/lib/perf/include/internal/evlist.h | 2 ++
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2 files changed, 11 insertions(+), 4 deletions(-)
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diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c
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index 17465d454a0e..a0aaf385cbb5 100644
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--- a/tools/lib/perf/evlist.c
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+++ b/tools/lib/perf/evlist.c
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@@ -26,13 +26,10 @@
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void perf_evlist__init(struct perf_evlist *evlist)
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{
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- int i;
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-
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- for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
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- INIT_HLIST_HEAD(&evlist->heads[i]);
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INIT_LIST_HEAD(&evlist->entries);
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evlist->nr_entries = 0;
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fdarray__init(&evlist->pollfd, 64);
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+ perf_evlist__reset_id_hash(evlist);
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}
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static void __perf_evlist__propagate_maps(struct perf_evlist *evlist,
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@@ -237,6 +234,14 @@ static void perf_evlist__id_hash(struct perf_evlist *evlist,
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hlist_add_head(&sid->node, &evlist->heads[hash]);
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}
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+void perf_evlist__reset_id_hash(struct perf_evlist *evlist)
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+{
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+ int i;
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+
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+ for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i)
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+ INIT_HLIST_HEAD(&evlist->heads[i]);
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+}
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+
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void perf_evlist__id_add(struct perf_evlist *evlist,
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struct perf_evsel *evsel,
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int cpu, int thread, u64 id)
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diff --git a/tools/lib/perf/include/internal/evlist.h b/tools/lib/perf/include/internal/evlist.h
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index 2d0fa02b036f..212c29063ad4 100644
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--- a/tools/lib/perf/include/internal/evlist.h
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+++ b/tools/lib/perf/include/internal/evlist.h
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@@ -124,4 +124,6 @@ int perf_evlist__id_add_fd(struct perf_evlist *evlist,
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struct perf_evsel *evsel,
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int cpu, int thread, int fd);
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+void perf_evlist__reset_id_hash(struct perf_evlist *evlist);
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+
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#endif /* __LIBPERF_INTERNAL_EVLIST_H */
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--
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2.30.0.617.g56c4b15f3c-goog
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