linux-kernel - Re: [PATCH 04/31] perf, core: Add generic intx/intx

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Message-ID: <1348845559.3292.84.camel@twins>
Date:	Fri, 28 Sep 2012 17:19:19 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-kernel@...r.kernel.org, x86@...nel.org, eranian@...gle.com,
	acme@...hat.com, Andi Kleen <ak@...ux.intel.com>,
	Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH 04/31] perf, core: Add generic intx/intx_checkpointed
 counter modifiers

On Fri, 2012-09-28 at 16:53 +0200, Andi Kleen wrote:
> If I moved this into sysfs this would imply that the perf stat -T 
> code would become Haswell specific. As far as I understand normally
> you guys don't want things like that. Would everyone be ok with
> having specific code there? 

Have a look at /sys/bus/event_source/devices/cpu/format/*, that's
already very hardware specific.

What I suggested is something like:

PMU_FORMAT_ATTR(intx, "config:32");
PMU_FORMAT_ATTR(intx_cp "config:33");

For the HSW+ cpus. That should be enough for userspace to create such
events.
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