linux-kernel - Re: [PATCH] tracing, perf : add cpu hotplug trace events

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Date:	Mon, 17 Jan 2011 17:21:08 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Vincent Guittot <vincent.guittot@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linux-hotplug@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Amit Kucheria <amit.kucheria@...aro.org>
Subject: Re: [PATCH] tracing, perf : add cpu hotplug trace events

On Mon, Jan 17, 2011 at 07:49:58AM -0600, Vincent Guittot wrote:
> I was just wondering which tracepoints format between my 1st proposal
> and yours was the easier to post process by an application like
> pytimechart.

No idea as pytimechart uses his own ad hoc event parsing. Either
way there won't be much differences though.

> I have updated the cpu hotplug tracepoint according to your remarks
> and steve's ones. I have just replaced the second
> cpu_arch_die_start/end in your proposal by cpu_arch_dead_start/endfrq

Tracepoints tend to describe actions rather than states, although I can
show you some exceptions as well. But this tends to be the major
tendency. I suggest you to be stay consistent with this scheme.

Thanks.
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