diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 6dc7a67e6d359023c57338e8e105fd7dbff1d77f..2d26b7ad6fe053e185a18f1d345a72f7573b99ed 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 7af0377ceb18117a2cb0ff0f983c08b540196dd8..5c93bed8e8d9fabbcad1204628579750680e5e16 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);