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Date: Fri, 17 Nov 2000 14:54:36 +0100
From: Andi Kleen <ak@suse.de>
To: Jeff Garzik <jgarzik@mandrakesoft.com>
Cc: Andi Kleen <ak@suse.de>, Christoph Rohland <cr@sap.com>,
        Alan Cox <alan@lxorguk.ukuu.org.uk>,
        Tigran Aivazian <tigran@veritas.com>,
        Mikael Pettersson <mikpe@csd.uu.se>, Jordan <ledzep37@home.com>,
        Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Error in x86 CPU capabilities starting with test5/6
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In-Reply-To: <3A15354B.4736A19@mandrakesoft.com>; from jgarzik@mandrakesoft.com on Fri, Nov 17, 2000 at 08:40:27AM -0500
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On Fri, Nov 17, 2000 at 08:40:27AM -0500, Jeff Garzik wrote:
> Andi Kleen wrote:
> > No it would not. Often you want cycle accurate couting for profiling
> > purposes.
> 
> Isn't that why /dev/cpu/%d/msr exists?

Requires either root privileges or is a big security hole.

[of course rdtsc only works properly on UP or with bind_cpu()]
-Andi
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