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| author |   Stephane Eranian <eranian@google.com> | 2013-01-29 12:47:43 +0100 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-01-30 10:36:38 -0300 |
| commit | c7a79c47c683de6979a3e1a96dc723b0606c07ca (patch) | |
| tree | ad9a8b84c07b1c97253157dbcfd2ab53a7098375 /tools/perf/util/evsel.c | |
| parent | perf tools: Make numa benchmark optional (diff) | |
| download | linux-dev-c7a79c47c683de6979a3e1a96dc723b0606c07ca.tar.xz linux-dev-c7a79c47c683de6979a3e1a96dc723b0606c07ca.zip | |
perf evsel: Add prev_raw_count field
This field will be used by commands which print counter deltas on
regular timer intervals, such as perf stat -I.
Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1359460064-3060-2-git-send-email-eranian@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/evsel.c')
| -rw-r--r-- | tools/perf/util/evsel.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index e45332d08a58..dbdcca43cac6 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -659,6 +659,28 @@ void perf_evsel__delete(struct perf_evsel *evsel) free(evsel); } +static inline void compute_deltas(struct perf_evsel *evsel, + int cpu, + struct perf_counts_values *count) +{ + struct perf_counts_values tmp; + + if (!evsel->prev_raw_counts) + return; + + if (cpu == -1) { + tmp = evsel->prev_raw_counts->aggr; + evsel->prev_raw_counts->aggr = *count; + } else { + tmp = evsel->prev_raw_counts->cpu[cpu]; + evsel->prev_raw_counts->cpu[cpu] = *count; + } + + count->val = count->val - tmp.val; + count->ena = count->ena - tmp.ena; + count->run = count->run - tmp.run; +} + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale) { @@ -674,6 +696,8 @@ int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, if (readn(FD(evsel, cpu, thread), &count, nv * sizeof(u64)) < 0) return -errno; + compute_deltas(evsel, cpu, &count); + if (scale) { if (count.run == 0) count.val = 0; @@ -712,6 +736,8 @@ int __perf_evsel__read(struct perf_evsel *evsel, } } + compute_deltas(evsel, -1, aggr); + evsel->counts->scaled = 0; if (scale) { if (aggr->run == 0) { |