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perf evsel: Add iterator to iterate over events ordered by CPU
Add some common code that is needed to iterate over all events in CPU order. Used in followon patches Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Link: http://lore.kernel.org/lkml/20191121001522.180827-6-andi@firstfloor.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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4 changed files with 42 additions and 0 deletions
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@ -63,4 +63,5 @@ int cpu_map__build_map(struct perf_cpu_map *cpus, struct perf_cpu_map **res,
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int cpu_map__cpu(struct perf_cpu_map *cpus, int idx);
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bool cpu_map__has(struct perf_cpu_map *cpus, int cpu);
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#endif /* __PERF_CPUMAP_H */
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@ -342,6 +342,38 @@ static int perf_evlist__nr_threads(struct evlist *evlist,
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return perf_thread_map__nr(evlist->core.threads);
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}
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void evlist__cpu_iter_start(struct evlist *evlist)
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{
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struct evsel *pos;
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/*
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* Reset the per evsel cpu_iter. This is needed because
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* each evsel's cpumap may have a different index space,
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* and some operations need the index to modify
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* the FD xyarray (e.g. open, close)
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*/
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evlist__for_each_entry(evlist, pos)
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pos->cpu_iter = 0;
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}
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bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu)
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{
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if (ev->cpu_iter >= ev->core.cpus->nr)
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return true;
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if (cpu >= 0 && ev->core.cpus->map[ev->cpu_iter] != cpu)
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return true;
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return false;
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}
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bool evsel__cpu_iter_skip(struct evsel *ev, int cpu)
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{
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if (!evsel__cpu_iter_skip_no_inc(ev, cpu)) {
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ev->cpu_iter++;
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return false;
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}
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return true;
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}
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void evlist__disable(struct evlist *evlist)
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{
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struct evsel *pos;
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@ -334,9 +334,17 @@ void perf_evlist__to_front(struct evlist *evlist,
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#define evlist__for_each_entry_safe(evlist, tmp, evsel) \
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__evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel)
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#define evlist__for_each_cpu(evlist, index, cpu) \
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evlist__cpu_iter_start(evlist); \
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perf_cpu_map__for_each_cpu (cpu, index, (evlist)->core.all_cpus)
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void perf_evlist__set_tracking_event(struct evlist *evlist,
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struct evsel *tracking_evsel);
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void evlist__cpu_iter_start(struct evlist *evlist);
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bool evsel__cpu_iter_skip(struct evsel *ev, int cpu);
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bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu);
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struct evsel *
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perf_evlist__find_evsel_by_str(struct evlist *evlist, const char *str);
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@ -95,6 +95,7 @@ struct evsel {
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bool collect_stat;
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bool weak_group;
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bool percore;
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int cpu_iter;
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const char *pmu_name;
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struct {
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perf_evsel__sb_cb_t *cb;
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