From: Adrian Hunter <adrian.hunter@intel.com>
To: Wang Nan <wangnan0@huawei.com>, acme@kernel.org, ast@plumgrid.com
Cc: linux-kernel@vger.kernel.org, pi3orama@163.com,
lizefan@huawei.com, Arnaldo Carvalho de Melo <acme@redhat.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [RFC PATCH v2 1/2] perf tools: Set evsel->system_wide field for global system wide recording
Date: Mon, 26 Oct 2015 14:24:15 +0200 [thread overview]
Message-ID: <562E1B6F.2020202@intel.com> (raw)
In-Reply-To: <1445859720-146146-2-git-send-email-wangnan0@huawei.com>
On 26/10/15 13:41, Wang Nan wrote:
> 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@huawei.com>
> Cc: Adrian Hunter <adrian.hunter@intel.com>
> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
> Cc: Alexei Starovoitov <ast@plumgrid.com>
> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Li Zefan <lizefan@huawei.com>
> Cc: pi3orama@163.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;
Well that breaks the way evsel->system_wide is used i.e. it is a parameter
to the evsel and here you just overwrote it.
> attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1;
> attr->inherit = !opts->no_inherit;
>
>
next prev parent reply other threads:[~2015-10-26 12:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-26 11:41 [RFC PATCH v2 0/2] perf tools: Don't set inherit bit for system wide evsel Wang Nan
2015-10-26 11:41 ` [RFC PATCH v2 1/2] perf tools: Set evsel->system_wide field for global system wide recording Wang Nan
2015-10-26 12:24 ` Adrian Hunter [this message]
2015-10-26 12:39 ` Wangnan (F)
2015-10-26 13:02 ` Adrian Hunter
2015-10-27 3:23 ` Wangnan (F)
2015-10-26 11:42 ` [RFC PATCH v2 2/2] perf tools: Don't set inherit bit for system wide evsel Wang Nan
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