Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 14/24] perf stat: Introduce perf_evsel__read function | Date | Fri, 26 Jun 2015 12:44:51 -0300 |
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From: Jiri Olsa <jolsa@kernel.org>
Adding simple read function that reads/store data into given struct perf_counts_values *count object.
Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1435310967-14570-14-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/perf/util/evsel.c | 14 ++++++++++++++ tools/perf/util/evsel.h | 3 +++ 2 files changed, 17 insertions(+)
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index cd6ce7066f85..2e0a4e064f44 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -955,6 +955,20 @@ int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, return cb(evsel, cpu, thread, &count); } +int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread, + struct perf_counts_values *count) +{ + memset(count, 0, sizeof(*count)); + + if (FD(evsel, cpu, thread) < 0) + return -EINVAL; + + if (readn(FD(evsel, cpu, thread), count, sizeof(*count)) < 0) + return -errno; + + return 0; +} + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale) { diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 020f7e13634a..a79944a21e8f 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -236,6 +236,9 @@ typedef int (perf_evsel__read_cb_t)(struct perf_evsel *evsel, int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, perf_evsel__read_cb_t cb); +int perf_evsel__read(struct perf_evsel *evsel, int cpu, int thread, + struct perf_counts_values *count); + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale); -- 2.1.0
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