linux-kernel - Re: [PATCH V3] perf tools: Clarify the output of perf sched map.

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Message-ID: <20140506072304.GA25402@gmail.com>
Date:	Tue, 6 May 2014 09:23:04 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	Dongsheng Yang <yangds.fnst@...fujitsu.com>
Cc:	jolsa@...hat.com, a.p.zijlstra@...llo.nl, paulus@...ba.org,
	acme@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] perf tools: Clarify the output of perf sched map.


* Dongsheng Yang <yangds.fnst@...fujitsu.com> wrote:

> From: Dongsheng <yangds.fnst@...fujitsu.com>
> 
> In output of perf sched map, any shortname of thread will be explained
> at the first time when it appear.
> 
> Example:
>               *A0       228836.978985 secs A0 => perf:23032
>           *.   A0       228836.979016 secs B0 => swapper:0
>            .  *C0       228836.979099 secs C0 => migration/3:22
>   *A0      .   C0       228836.979115 secs
>    A0      .  *.        228836.979115 secs
> 
> But B0, which is explained as swapper:0 did not appear in the
> left part of output. Instead, we use '.' as the shortname of
> swapper:0. So the comment of "B0 => swapper:0" is not easy to
> understand.
> 
> This patch clarify the output of perf sched map with not allocating
> one letter-number shortname for swapper:0 and print ". => swapper:0"
> as the explaination for swapper:0.
> 
> Example:
>               *A0       228836.978985 secs A0 => perf:23032
>           * .  A0       228836.979016 secs .  => swapper:0
>             . *B0       228836.979099 secs B0 => migration/3:22
>   *A0       .  B0       228836.979115 secs
>    A0       . * .       228836.979115 secs
>    A0     *C0   .       228836.979225 secs C0 => ksoftirqd/2:18
>    A0     *D0   .       228836.979236 secs D0 => rcu_sched:7
> 
> Signed-off-by: Dongsheng <yangds.fnst@...fujitsu.com>
> Acked-by: Ingo Molnar <mingo@...nel.org>

Looks good to me, thanks!

	Ingo
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