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authorFrederik Deweerdt <frederik.deweerdt@xprog.eu>2013-03-01 22:02:27 +0400
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-03-15 21:01:26 +0400
commita7e191c376fad084d9f3c7ac89a1f7c47462ebc8 (patch)
tree15f13ba7e2bc804f6993faaac9c72a894fa0135d /tools/perf/util
parentd723a55096b81a13c319485f01994e0a539efcf9 (diff)
downloadlinux-a7e191c376fad084d9f3c7ac89a1f7c47462ebc8.tar.xz
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.c6
-rw-r--r--tools/perf/util/evsel.h1
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);