linux-kernel - Re: [PATCH V3 06/11] perf record: Add an option to force per-cpu mmaps

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Date:	Fri, 08 Nov 2013 09:57:57 +0200
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...hat.com>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH V3 06/11] perf record: Add an option to force per-cpu
 mmaps

On 05/11/13 19:31, Arnaldo Carvalho de Melo wrote:
> PeterZ,
>
> 	Can I have your Acked-by for this one? I guess now the goal is
> achieved, no?

Ping

>
> - Arnaldo
>
> Em Tue, Nov 05, 2013 at 11:25:45AM -0300, Arnaldo Carvalho de Melo escreveu:
>> Em Tue, Nov 05, 2013 at 02:30:24PM +0100, Jiri Olsa escreveu:
>>> On Tue, Nov 05, 2013 at 03:09:30PM +0200, Adrian Hunter wrote:
>>>>> right, I haven't considered the hundreds CPU machine.. I just
>>>>> saw that it disables inherited events in my test ;-) maybe we
>>>>> could mentioned that somewhere, because it's not clear
>>>> How about this:
>>>>
>>>> From: Adrian Hunter <adrian.hunter@...el.com>
>>>>
>>>> By default, when tasks are specified (i.e. -p, -t
>>>> or -u options) per-thread mmaps are created.  Add
>>>> an option to override that and force per-cpu mmaps.
>>>>
>>>> Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
>>> seems ok, thanks
>> Much better, but may I ask that the explanation in the man pages be
>> present in the changeset commit as well? So that by just looking at 'git
>> log' we can more readily get the whole picture, i.e. scalability versus
>> wanting to have inherit.
>>
>> - Arnaldo
>>  
>>> Acked-by: Jiri Olsa <jolsa@...hat.com>
>>>
>>> jirka
>

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