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| author | Jiri Olsa <jolsa@kernel.org> | 2014-11-21 10:31:07 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2014-11-24 18:03:50 -0300 |
| commit | 011dccbdd93b7022c5c67e7c55fa8b5030b5e03d (patch) | |
| tree | 10e439cf503f6c6c30ace37f30c85201b0c0bd6a /tools | |
| parent | 13112bbf595d4081f291f7061bb096dbf4401d41 (diff) | |
| download | linux-011dccbdd93b7022c5c67e7c55fa8b5030b5e03d.tar.gz | |
perf evsel: Introduce perf_evsel__read_cb function
Adding perf_evsel__read_cb read function that retuns count values via callback. It will be used later in stat command as single way to retrieve counter values. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1416562275-12404-4-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/evsel.c | 16 | ||||
| -rw-r--r-- | tools/perf/util/evsel.h | 7 |
2 files changed, 23 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 6dc7a67e6d35..2d26b7ad6fe0 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -917,6 +917,22 @@ void perf_counts_values__scale(struct perf_counts_values *count, *pscaled = scaled; } +int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, + perf_evsel__read_cb_t cb) +{ + 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 cb(evsel, cpu, thread, &count); +} + 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 7af0377ceb18..5c93bed8e8d9 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -233,6 +233,13 @@ static inline bool perf_evsel__match2(struct perf_evsel *e1, (a)->attr.type == (b)->attr.type && \ (a)->attr.config == (b)->attr.config) +typedef int (perf_evsel__read_cb_t)(struct perf_evsel *evsel, + int cpu, int thread, + struct perf_counts_values *count); + +int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, + perf_evsel__read_cb_t cb); + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale); |