linux-kernel - Re: [PATCH RFC v2 0/4] perf: IRQ-bound performance events

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Date:	Mon, 13 Jan 2014 16:50:37 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Alexander Gordeev <agordeev@...hat.com>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Jiri Olsa <jolsa@...hat.com>, Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Andi Kleen <ak@...ux.jf.intel.com>
Subject: Re: [PATCH RFC v2 0/4] perf: IRQ-bound performance events

On Sat, Jan 04, 2014 at 07:22:32PM +0100, Alexander Gordeev wrote:
> Hello,
> 
> This is version 2 of RFC "perf: IRQ-bound performance events". That is an
> introduction of IRQ-bound performance events - ones that only count in a
> context of a hardware interrupt handler. Ingo suggested to extend this
> functionality to softirq and threaded handlers as well:

Hi Alexander,

I still strongly think we should use toggle events to achieve that:
https://lkml.org/lkml/2013/9/25/227

This will let us count not just IRQs (-e 'cycles,irq_entry/on=cycles/,irq_exit/off=cycles/') but much more. 

The patchset still needs some polishing but I think that's a better diection.

Thanks.
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