linux-kernel - [PATCH 32/45] perf stat report: Process cpu/threads maps

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Date:	Wed, 30 Sep 2015 16:10:45 +0200
From:	Jiri Olsa <jolsa@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	"Liang, Kan" <kan.liang@...el.com>
Subject: [PATCH 32/45] perf stat report: Process cpu/threads maps

Adding processing of cpu/threads maps. Configuring session's
evlist with these maps.

Link: http://lkml.kernel.org/n/tip-f2bo5wm0cw76zc5qsjm4pztx@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/builtin-stat.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 4861fd639b7e..4ee00803bc96 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -132,6 +132,9 @@ struct perf_stat {
 	struct perf_session	*session;
 	u64			 bytes_written;
 	struct perf_tool	 tool;
+	bool			 maps_allocated;
+	struct cpu_map		*cpus;
+	struct thread_map	*threads;
 };
 
 static struct perf_stat		perf_stat;
@@ -1399,6 +1402,63 @@ static int __cmd_record(int argc, const char **argv)
 	return argc;
 }
 
+static int set_maps(struct perf_stat *stat)
+{
+	if (!stat->cpus || !stat->threads)
+		return 0;
+
+	if (WARN_ONCE(stat->maps_allocated, "stats double allocation\n"))
+		return -EINVAL;
+
+	perf_evlist__set_maps(evsel_list, stat->cpus, stat->threads);
+
+	if (perf_evlist__alloc_stats(evsel_list, true))
+		return -ENOMEM;
+
+	stat->maps_allocated = true;
+	return 0;
+}
+
+static
+int process_thread_map_event(struct perf_tool *tool __maybe_unused,
+			     union perf_event *event,
+			     struct perf_session *session __maybe_unused)
+{
+	struct perf_stat *stat = container_of(tool, struct perf_stat, tool);
+
+	if (stat->threads) {
+		pr_warning("Extra thread map event, ignoring.\n");
+		return 0;
+	}
+
+	stat->threads = thread_map__new_event(&event->thread_map);
+	if (!stat->threads)
+		return -ENOMEM;
+
+	return set_maps(stat);
+}
+
+static
+int process_cpu_map_event(struct perf_tool *tool __maybe_unused,
+			  union perf_event *event,
+			  struct perf_session *session __maybe_unused)
+{
+	struct perf_stat *stat = container_of(tool, struct perf_stat, tool);
+	struct cpu_map *cpus;
+
+	if (stat->cpus) {
+		pr_warning("Extra cpu map event, ignoring.\n");
+		return 0;
+	}
+
+	cpus = cpu_map__new_event(&event->cpu_map);
+	if (!cpus)
+		return -ENOMEM;
+
+	stat->cpus = cpus;
+	return set_maps(stat);
+}
+
 static const char * const report_usage[] = {
 	"perf stat report [<options>]",
 	NULL,
@@ -1407,6 +1467,8 @@ static const char * const report_usage[] = {
 static struct perf_stat perf_stat = {
 	.tool = {
 		.attr		= perf_event__process_attr,
+		.thread_map	= process_thread_map_event,
+		.cpu_map	= process_cpu_map_event,
 	},
 };
 
-- 
2.4.3

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