linux-kernel - [tip:perf/urgent] perf evlist: Propagate cpu maps to evsels in an evlist

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Date:	Fri, 26 Jun 2015 01:45:07 -0700
From:	tip-bot for Jiri Olsa <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	adrian.hunter@...el.com, linux-kernel@...r.kernel.org,
	hpa@...or.com, namhyung@...nel.org, acme@...hat.com,
	jolsa@...nel.org, a.p.zijlstra@...llo.nl, ak@...ux.intel.com,
	mingo@...nel.org, dsahern@...il.com, tglx@...utronix.de,
	eranian@...gle.com
Subject: [tip:perf/urgent] perf evlist:
  Propagate cpu maps to evsels in an evlist

Commit-ID:  b7f0c203586b91419ff9aa9b1115e261082ff5b4
Gitweb:     http://git.kernel.org/tip/b7f0c203586b91419ff9aa9b1115e261082ff5b4
Author:     Jiri Olsa <jolsa@...nel.org>
AuthorDate: Tue, 23 Jun 2015 00:36:06 +0200
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 25 Jun 2015 15:15:51 -0300

perf evlist: Propagate cpu maps to evsels in an evlist

Propagate evlist's cpu_map object through all the evsel objects, while
keeping already configured evsel->cpus.

It'll be handy to access evsel's cpus directly in following patches.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Stephane Eranian <eranian@...gle.com>
Link: http://lkml.kernel.org/r/1435012588-9007-6-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/evlist.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index a8d18a3..214affa 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -1101,6 +1101,29 @@ int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages,
 	return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false);
 }
 
+static int perf_evlist__propagate_maps(struct perf_evlist *evlist,
+				       struct target *target)
+{
+	struct perf_evsel *evsel;
+
+	evlist__for_each(evlist, evsel) {
+		/*
+		 * We already have cpus for evsel (via PMU sysfs) so
+		 * keep it, if there's no target cpu list defined.
+		 */
+		if (evsel->cpus && target->cpu_list)
+			cpu_map__put(evsel->cpus);
+
+		if (!evsel->cpus || target->cpu_list)
+			evsel->cpus = cpu_map__get(evlist->cpus);
+
+		if (!evsel->cpus)
+			return -ENOMEM;
+	}
+
+	return 0;
+}
+
 int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target)
 {
 	evlist->threads = thread_map__new_str(target->pid, target->tid,
@@ -1117,7 +1140,7 @@ int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target)
 	if (evlist->cpus == NULL)
 		goto out_delete_threads;
 
-	return 0;
+	return perf_evlist__propagate_maps(evlist, target);
 
 out_delete_threads:
 	thread_map__put(evlist->threads);
--
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