perf stat: Separate counters reading and processing
Separating counters reading and processing so we could use the processing part in following patches. Using simple reading via perf_evsel__read function to read counters now, because part of the processing was in the read_cb callback. 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/1435310967-14570-16-git-send-email-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -217,7 +217,8 @@ static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
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return 0;
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}
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static int read_cb(struct perf_evsel *evsel, int cpu, int thread,
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static int
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process_counter_values(struct perf_evsel *evsel, int cpu, int thread,
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struct perf_counts_values *count)
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{
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struct perf_counts_values *aggr = &evsel->counts->aggr;
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@ -239,7 +240,6 @@ static int read_cb(struct perf_evsel *evsel, int cpu, int thread,
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if (!evsel->snapshot)
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perf_evsel__compute_deltas(evsel, cpu, thread, count);
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perf_counts_values__scale(count, scale, NULL);
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*perf_counts(evsel->counts, cpu, thread) = *count;
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if (aggr_mode == AGGR_NONE)
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perf_stat__update_shadow_stats(evsel, count->values, cpu);
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break;
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@ -256,23 +256,41 @@ static int read_cb(struct perf_evsel *evsel, int cpu, int thread,
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return 0;
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}
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static int read_counter(struct perf_evsel *counter);
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static int process_counter_maps(struct perf_evsel *counter)
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{
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int nthreads = thread_map__nr(counter->threads);
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int ncpus = perf_evsel__nr_cpus(counter);
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int cpu, thread;
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/*
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* Read out the results of a single counter:
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* aggregate counts across CPUs in system-wide mode
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*/
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static int read_counter_aggr(struct perf_evsel *counter)
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if (counter->system_wide)
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nthreads = 1;
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for (thread = 0; thread < nthreads; thread++) {
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for (cpu = 0; cpu < ncpus; cpu++) {
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if (process_counter_values(counter, cpu, thread,
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perf_counts(counter->counts, cpu, thread)))
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return -1;
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}
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}
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return 0;
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}
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static int process_counter(struct perf_evsel *counter)
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{
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struct perf_counts_values *aggr = &counter->counts->aggr;
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struct perf_stat *ps = counter->priv;
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u64 *count = counter->counts->aggr.values;
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int i;
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int i, ret;
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aggr->val = aggr->ena = aggr->run = 0;
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if (read_counter(counter))
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return -1;
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ret = process_counter_maps(counter);
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if (ret)
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return ret;
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if (aggr_mode != AGGR_GLOBAL)
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return 0;
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if (!counter->snapshot)
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perf_evsel__compute_deltas(counter, -1, -1, aggr);
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@ -315,7 +333,10 @@ static int read_counter(struct perf_evsel *counter)
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for (thread = 0; thread < nthreads; thread++) {
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for (cpu = 0; cpu < ncpus; cpu++) {
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if (perf_evsel__read_cb(counter, cpu, thread, read_cb))
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struct perf_counts_values *count;
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count = perf_counts(counter->counts, cpu, thread);
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if (perf_evsel__read(counter, cpu, thread, count))
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return -1;
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}
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}
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@ -332,10 +353,11 @@ static void read_counters(bool close)
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ps = counter->priv;
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memset(ps->res_stats, 0, sizeof(ps->res_stats));
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if (aggr_mode == AGGR_GLOBAL)
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read_counter_aggr(counter);
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else
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read_counter(counter);
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if (read_counter(counter))
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pr_warning("failed to read counter %s\n", counter->name);
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if (process_counter(counter))
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pr_warning("failed to process counter %s\n", counter->name);
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if (close) {
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perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
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