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| author | Frederik Deweerdt <frederik.deweerdt@xprog.eu> | 2013-03-01 13:02:27 -0500 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-03-15 14:01:26 -0300 |
| commit | a7e191c376fad084d9f3c7ac89a1f7c47462ebc8 (patch) | |
| tree | 15f13ba7e2bc804f6993faaac9c72a894fa0135d /tools/perf/util | |
| parent | d723a55096b81a13c319485f01994e0a539efcf9 (diff) | |
| download | linux-a7e191c376fad084d9f3c7ac89a1f7c47462ebc8.tar.gz linux-a7e191c376fad084d9f3c7ac89a1f7c47462ebc8.tar.bz2 linux-a7e191c376fad084d9f3c7ac89a1f7c47462ebc8.zip | |
perf stat: Introduce --repeat forever
The following patch causes 'perf stat --repeat 0' to be interpreted as
'forever', displaying the stats for every run.
We act as if a single run was asked, and reset the stats in each
iteration. In this mode SIGINT is passed to perf to be able to stop the
loop with Ctrl+C.
Signed-off-by: Frederik Deweerdt <frederik.deweerdt@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20130301180227.GA24385@ks398093.ip-192-95-24.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util')
| -rw-r--r-- | tools/perf/util/evsel.c | 6 | ||||
| -rw-r--r-- | tools/perf/util/evsel.h | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 7fde9fb79966..1adb824610f0 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -633,6 +633,12 @@ int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads) return 0; } +void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus) +{ + memset(evsel->counts, 0, (sizeof(*evsel->counts) + + (ncpus * sizeof(struct perf_counts_values)))); +} + int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus) { evsel->counts = zalloc((sizeof(*evsel->counts) + diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index bf758e53c929..3f156ccc1acb 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -121,6 +121,7 @@ int perf_evsel__group_desc(struct perf_evsel *evsel, char *buf, size_t size); int perf_evsel__alloc_fd(struct perf_evsel *evsel, int ncpus, int nthreads); int perf_evsel__alloc_id(struct perf_evsel *evsel, int ncpus, int nthreads); int perf_evsel__alloc_counts(struct perf_evsel *evsel, int ncpus); +void perf_evsel__reset_counts(struct perf_evsel *evsel, int ncpus); void perf_evsel__free_fd(struct perf_evsel *evsel); void perf_evsel__free_id(struct perf_evsel *evsel); void perf_evsel__free_counts(struct perf_evsel *evsel); |