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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>
This commit is contained in:
Andi Kleen 2019-11-20 16:15:15 -08:00 committed by Arnaldo Carvalho de Melo
parent a2408a7036
commit a8cbe40fe9
4 changed files with 42 additions and 0 deletions
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1
tools/perf/util/cpumap.h
View File

@ -63,4 +63,5 @@ int cpu_map__build_map(struct perf_cpu_map *cpus, struct perf_cpu_map **res,
int cpu_map__cpu(struct perf_cpu_map *cpus, int idx);
bool cpu_map__has(struct perf_cpu_map *cpus, int cpu);
#endif /* __PERF_CPUMAP_H */

32
tools/perf/util/evlist.c
View File

@ -342,6 +342,38 @@ static int perf_evlist__nr_threads(struct evlist *evlist,
return perf_thread_map__nr(evlist->core.threads);
}
void evlist__cpu_iter_start(struct evlist *evlist)
{
struct evsel *pos;
/*
* Reset the per evsel cpu_iter. This is needed because
* each evsel's cpumap may have a different index space,
* and some operations need the index to modify
* the FD xyarray (e.g. open, close)
*/
evlist__for_each_entry(evlist, pos)
pos->cpu_iter = 0;
}
bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu)
{
if (ev->cpu_iter >= ev->core.cpus->nr)
return true;
if (cpu >= 0 && ev->core.cpus->map[ev->cpu_iter] != cpu)
return true;
return false;
}
bool evsel__cpu_iter_skip(struct evsel *ev, int cpu)
{
if (!evsel__cpu_iter_skip_no_inc(ev, cpu)) {
ev->cpu_iter++;
return false;
}
return true;
}
void evlist__disable(struct evlist *evlist)
{
struct evsel *pos;

8
tools/perf/util/evlist.h
View File

@ -334,9 +334,17 @@ void perf_evlist__to_front(struct evlist *evlist,
#define evlist__for_each_entry_safe(evlist, tmp, evsel) \
__evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel)
#define evlist__for_each_cpu(evlist, index, cpu) \
evlist__cpu_iter_start(evlist); \
perf_cpu_map__for_each_cpu (cpu, index, (evlist)->core.all_cpus)
void perf_evlist__set_tracking_event(struct evlist *evlist,
struct evsel *tracking_evsel);
void evlist__cpu_iter_start(struct evlist *evlist);
bool evsel__cpu_iter_skip(struct evsel *ev, int cpu);
bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu);
struct evsel *
perf_evlist__find_evsel_by_str(struct evlist *evlist, const char *str);

1
tools/perf/util/evsel.h
View File

@ -95,6 +95,7 @@ struct evsel {
bool collect_stat;
bool weak_group;
bool percore;
int cpu_iter;
const char *pmu_name;
struct {
perf_evsel__sb_cb_t *cb;