From: "stephane eranian" <eranian@googlemail.com>
To: "Andi Kleen" <andi@firstfloor.org>
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: Thu, 8 May 2008 08:42:35 -0800 [thread overview]
Message-ID: <7c86c4470805080942v4b3c17a7jacf5e14eb21b1345@mail.gmail.com> (raw)
In-Reply-To: <4821BD2A.3090000@firstfloor.org>
Andi,
It is not necessarily that easy. I will lok at this next week.
On 5/7/08, Andi Kleen <andi@firstfloor.org> wrote:
> 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
>
prev parent reply other threads:[~2008-05-08 16:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-07 8:33 stephane eranian
2008-05-07 14:17 ` Andi Kleen
2008-05-07 14:24 ` stephane eranian
2008-05-07 14:31 ` Andi Kleen
2008-05-08 16:42 ` stephane eranian [this message]
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