linux-kernel - Re: [PATCH 3/3] perf tools: Clarify the output of perf sched map.

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Date:	Mon, 05 May 2014 12:27:04 -0600
From:	David Ahern <dsahern@...il.com>
To:	Jiri Olsa <jolsa@...hat.com>,
	Dongsheng Yang <yangds.fnst@...fujitsu.com>
CC:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	acme@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] perf tools: Clarify the output of perf sched map.

On 5/5/14, 12:24 PM, Jiri Olsa wrote:
> On Mon, May 05, 2014 at 04:05:55PM +0900, Dongsheng Yang 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
>
> I've never used 'perf sched map' before, so I'm not
> sure about this one.. Arnaldo, David, Ingo?  ;-)

Patches 1 and 2 look ok to me.

This one is a preference change -- deferring to Ingo and Arnaldo on it.

David

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