linux-kernel - [RFC PATCH v2 1/2] perf tools: Set evsel->system_wide field for global system wide recording

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Date:	Mon, 26 Oct 2015 11:41:59 +0000
From:	Wang Nan <wangnan0@...wei.com>
To:	<acme@...nel.org>, <ast@...mgrid.com>, <adrian.hunter@...el.com>
CC:	<linux-kernel@...r.kernel.org>, <pi3orama@....com>,
	<lizefan@...wei.com>, Wang Nan <wangnan0@...wei.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [RFC PATCH v2 1/2] perf tools: Set evsel->system_wide field for global system wide recording

evsel->system_wide is introduced by commit bf8e8f4b832972c76d64ab2e2837
(perf evlist: Add 'system_wide' option), which is used for mixing evsels
that aren't system-wide with ones that are [1]. However, for global
system wide recording (perf record -a ...), evsel->system_wide is set
to false, which is confusion.

This patch set evsel->system_wide to true if the target.system_wide is
set, which makes evsel->system_wide a reliable way to describe whether
itself is system_wide or not.

[1] http://lkml.kernel.org/r/562DF19B.2080608@intel.com

Signed-off-by: Wang Nan <wangnan0@...wei.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Alexei Starovoitov <ast@...mgrid.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Li Zefan <lizefan@...wei.com>
Cc: pi3orama@....com
Link: http://lkml.kernel.org/n/ebpf-qm3gtwidc1o5ktjd9tgjex25@git.kernel.org
---
 tools/perf/util/evsel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 3ac4ee9c..36ecf0e 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -734,6 +734,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
 	int track = evsel->tracking;
 	bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread;
 
+	evsel->system_wide = opts->target.system_wide;
 	attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
 	attr->inherit	    = !opts->no_inherit;
 
-- 
1.8.3.4

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