linux-kernel - Re: [PATCH 5/5 v2] perf timechart: add emphasize option

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Date:	Tue, 17 Dec 2013 14:12:49 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Stanislav Fomichev <stfomichev@...dex-team.ru>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel@...r.kernel.org, a.p.zijlstra@...llo.nl,
	paulus@...ba.org, mingo@...hat.com, namhyung@...nel.org,
	artagnon@...il.com, jolsa@...hat.com
Subject: Re: [PATCH 5/5 v2] perf timechart: add emphasize option


* Stanislav Fomichev <stfomichev@...dex-team.ru> wrote:

> > Please give a sample usage command line and a sample output. (the 
> > highlighting can be done using ASCII escape sequences in the changelog 
> > as well.)
> Highlighting is done in the generated SVG, so I can't really show it in
> the log or documentation. But I added simple example with -e option.
> 
> >   -e::
> >   --emphasize=<duration_nsecs|task_name>::
> Thanks, added.
> 
> > It's also not made clear that the option can take a numeric input, and 
> > if the input is numeric, it is interpreted as a task name.
> > 
> > So please make features more approachable!
> Added more info to the documentation.
> 
> Attached new patch below.
> 
> ---
> 
> This option highlights tasks (using different color) that run more than given
> duration or tasks with given name.
> 
> Signed-off-by: Stanislav Fomichev <stfomichev@...dex-team.ru>
> ---
>  tools/perf/Documentation/perf-timechart.txt | 14 ++++++++++++++
>  tools/perf/builtin-timechart.c              | 21 ++++++++++++++++++++-
>  tools/perf/util/svghelper.c                 | 23 ++++++++++++++++++++---
>  tools/perf/util/svghelper.h                 |  4 +++-
>  4 files changed, 57 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/Documentation/perf-timechart.txt b/tools/perf/Documentation/perf-timechart.txt
> index 367c1be0551c..b81e91dd16ce 100644
> --- a/tools/perf/Documentation/perf-timechart.txt
> +++ b/tools/perf/Documentation/perf-timechart.txt
> @@ -56,12 +56,26 @@ $ perf timechart
>  
>    Written 10.2 seconds of trace to output.svg.
>  
> +Record system-wide timechart:
> +
> +  $ perf timechart record
> +
> +  then generate timechart and highlight 'gcc' tasks:
> +
> +  $ perf timechart -e gcc
> +
>  -n::
>  --proc-num::
>          Print task info for at least given number of tasks.
>  -t::
>  --topology::
>          Sort CPUs according to topology.
> +-e::
> +--emphasize=<duration_nsecs|task_name>::
> +	Highlight tasks (using different color) that run more than given
> +	duration or tasks with given name. If number is given it's interpreted
> +	as number of nanoseconds. If non-numeric string is given it's
> +	interpreted as task name.

Looks good to me, thanks!

Acked-by: Ingo Molnar <mingo@...nel.org>

Thanks,

	Ingo
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