linux-kernel - Re: REGRESSION: the new i386 timer code fails to sync CPUs

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Message-ID: <20060724085201.A6517@unix-os.sc.intel.com>
Date:	Mon, 24 Jul 2006 08:52:01 -0700
From:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>
To:	smurf@...rf.noris.de
Cc:	Matthias Urlichs <smurf@...rf.noris.de>,
	linux-kernel@...r.kernel.org, johnstul@...ibm.com,
	torvalds@...l.org, bunk@...sta.de, lethal@...ux-sh.org,
	hirofumi@...l.parknet.co.jp, akpm@...l.org
Subject: Re: REGRESSION: the new i386 timer code fails to sync CPUs

On Sun, Jul 23, 2006 at 05:37:55AM -0700, Andrew Morton wrote:
> On Sun, 23 Jul 2006 14:08:29 +0200
> Matthias Urlichs <smurf@...rf.noris.de> wrote:
> > Interestingly, CPU0/1 gets 6000 bogomips while CPU2/3 only reaches 5600 ..?
> > (That happens with both kernels.) I do wonder why, and whether this has any
> > bearing on the current problem.
> 
> I wouldn't expect it to matter, unless the TSCs are running at different
> speeds or something.

Matthias, Can you send us the /proc/cpuinfo output of your system?

>From your config it looks like CPU_FREQ is disabled. Perhaps, can you try with
CPU_FREQ enabled in your config  and see if you see the same issue?

thanks,
suresh
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