From: Andi Kleen <andi@firstfloor.org>
To: stephane eranian <eranian@googlemail.com>
Cc: linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Ingo Molnar <mingo@elte.hu>,
tglx@linutronix.de
Subject: Re: [PATCH] perfmon: add context switch hooks for x86
Date: Wed, 07 May 2008 16:31:06 +0200 [thread overview]
Message-ID: <4821BD2A.3090000@firstfloor.org> (raw)
In-Reply-To: <7c86c4470805070724v793fbdcamf18579308a183a9d@mail.gmail.com>
stephane eranian wrote:
> Andi,
>
> It would be much bigger because it would pull in a bunch of generic
> and model-specific
> data structures and code.
>
> To context switch, you need to know what the registers are, thus you
> need the PMU
> mapping table, which is implemented by a kernel module, so it needs
> its registration
> framework....
Can you strip it down to be simpler?
Minimally generic x86 perfctr switching code just needs an array with
MSR numbers, doesn't it? And there are only a few variants.
-Andi
next prev parent reply other threads:[~2008-05-07 14:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-07 8:33 [PATCH] perfmon: add context switch hooks for x86 stephane eranian
2008-05-07 14:17 ` Andi Kleen
2008-05-07 14:24 ` stephane eranian
2008-05-07 14:31 ` Andi Kleen [this message]
2008-05-08 16:42 ` stephane eranian
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