linux-kernel - Re: [PATCH 3/3] perf top: Enable --namespaces option

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Message-ID: <20190522132424.GD30271@kernel.org>
Date:   Wed, 22 May 2019 10:24:24 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, LKML <linux-kernel@...r.kernel.org>,
        Krister Johansen <kjlx@...pleofstupid.com>,
        Hari Bathini <hbathini@...ux.vnet.ibm.com>
Subject: Re: [PATCH 3/3] perf top: Enable --namespaces option

Em Wed, May 22, 2019 at 02:32:50PM +0900, Namhyung Kim escreveu:
> Since perf record already have the option, let's have it for perf top
> as well.

I'm applying, but I wonder if this shouldn't be the default...

- Arnaldo
 
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/Documentation/perf-top.txt | 5 +++++
>  tools/perf/builtin-top.c              | 5 +++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt
> index 44d89fb9c788..cfea87c6f38e 100644
> --- a/tools/perf/Documentation/perf-top.txt
> +++ b/tools/perf/Documentation/perf-top.txt
> @@ -262,6 +262,11 @@ Default is to monitor all CPUS.
>  	The number of threads to run when synthesizing events for existing processes.
>  	By default, the number of threads equals to the number of online CPUs.
>  
> +--namespaces::
> +	Record events of type PERF_RECORD_NAMESPACES and display it with the
> +	'cgroup_id' sort key.
> +
> +
>  INTERACTIVE PROMPTING KEYS
>  --------------------------
>  
> diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
> index 3648ef576996..6651377fd762 100644
> --- a/tools/perf/builtin-top.c
> +++ b/tools/perf/builtin-top.c
> @@ -1208,6 +1208,9 @@ static int __cmd_top(struct perf_top *top)
>  
>  	init_process_thread(top);
>  
> +	if (opts->record_namespaces)
> +		top->tool.namespace_events = true;
> +
>  	ret = perf_event__synthesize_bpf_events(top->session, perf_event__process,
>  						&top->session->machines.host,
>  						&top->record_opts);
> @@ -1500,6 +1503,8 @@ int cmd_top(int argc, const char **argv)
>  	OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
>  	OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
>  			"number of thread to run event synthesize"),
> +	OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,
> +		    "Record namespaces events"),
>  	OPT_END()
>  	};
>  	struct perf_evlist *sb_evlist = NULL;
> -- 
> 2.21.0.1020.gf2820cf01a-goog

-- 

- Arnaldo