linux-kernel - Re: [PATCHv3 0/3] perf tool: Add new event group management

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Date:	Wed, 18 Jul 2012 08:34:10 -0400
From:	Ulrich Drepper <drepper@...il.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Stephane Eranian <eranian@...gle.com>,
	Namhyung Kim <namhyung@...il.com>, acme@...hat.com,
	a.p.zijlstra@...llo.nl, mingo@...e.hu, paulus@...ba.org,
	cjashfor@...ux.vnet.ibm.com, fweisbec@...il.com,
	linux-kernel@...r.kernel.org, tglx@...utronix.de,
	andi@...stfloor.org
Subject: Re: [PATCHv3 0/3] perf tool: Add new event group management

On Wed, Jul 18, 2012 at 6:21 AM, Jiri Olsa <jolsa@...hat.com> wrote:
> Well, I personally like the '{}' syntax more than '--group-events or --group-reads
> option in front', it feels more user friendly.. anyway, we can easily have both ways.

I like the actual visual grouping better, too.

Also, it doesn't require us to define what

   -e E1,E2 --group-events -e E3,E4

means.  Does --group-events also apply to the first parameter?


> As for the group attributes and group leader sampling, I don't mind omitting
> them at this point and get back to that if we find it useful in future.

Just define the first event the leader.  What reason is there which
prevents this?


I can only second what Andi wrote: just get it done quickly.  This is
functionality that is desperately needed.
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