Commit c7a79c47 authored by Stephane Eranian's avatar Stephane Eranian Committed by Arnaldo Carvalho de Melo
Browse files

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: default avatarStephane 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: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 79d824e3

tools/perf/util/evsel.c

+26 −0
Original line number Diff line number Diff line
@@ -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) {

tools/perf/util/evsel.h

+1 −0
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ struct perf_evsel { 
	struct xyarray		*sample_id;

	u64			*id;

	struct perf_counts	*counts;

	struct perf_counts	*prev_raw_counts;

	int			idx;

	u32			ids;

	struct hists		hists;

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