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Commit 932a3594 authored by Jiri Olsa's avatar Jiri Olsa Committed by Arnaldo Carvalho de Melo
Browse files

perf evlist: Add perf_evlist__id2sid method to get event ID related data 



This will be helpful for PERF_FORMAT_GROUP samples where we need to
store ID related period value for each event.

Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-twmlgsbyim97p7cyohjwb1df@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent c4861afe

tools/perf/util/evlist.c

+16 −5
Original line number Diff line number Diff line
@@ -337,20 +337,31 @@ static int perf_evlist__id_add_fd(struct perf_evlist *evlist, 
	return 0;

}



struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)

struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id)

{

	struct hlist_head *head;

	struct perf_sample_id *sid;

	int hash;



	if (evlist->nr_entries == 1)

		return perf_evlist__first(evlist);



	hash = hash_64(id, PERF_EVLIST__HLIST_BITS);

	head = &evlist->heads[hash];



	hlist_for_each_entry(sid, head, node)

		if (sid->id == id)

			return sid;



	return NULL;

}



struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)

{

	struct perf_sample_id *sid;



	if (evlist->nr_entries == 1)

		return perf_evlist__first(evlist);



	sid = perf_evlist__id2sid(evlist, id);

	if (sid)

		return sid->evsel;



	if (!perf_evlist__sample_id_all(evlist))

tools/perf/util/evlist.h

+2 −0
Original line number Diff line number Diff line
@@ -78,6 +78,8 @@ void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd); 


struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);



struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id);



union perf_event *perf_evlist__mmap_read(struct perf_evlist *self, int idx);



int perf_evlist__open(struct perf_evlist *evlist);