linux-kernel - Re: Linux 2.6.21: pmtmr losing time

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Message-Id: <1177950216.5791.241.camel@localhost.localdomain>
Date:	Mon, 30 Apr 2007 18:23:36 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Joerg Sommrey <jo@...mrey.de>
Cc:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.21: pmtmr losing time

On Mon, 2007-04-30 at 14:52 +0200, Joerg Sommrey wrote:
> Hi all,
> 
> after switching to 2.6.21 the system clock sporadically loses time on my
> box (i386, Athlon MP).
> It's always around 4.68 seconds and happened 7 times in the last 12
> hours.  A simple calculation (2 ^ ACPI_PM_MASK / PMTMR_TICKS_PER_SEC =
> 2 ^ 24 / 3579545 = 4.686968875) shows: There is almost exactly one
> pmtmr-cycle missing.  Could this be caused by a pmtmr-wrap when the
> system is in a sleep state? 

Hmm, looks like. That's strange we don't sleep 4.68 seconds. Can you
provide me the output of /proc/timer_list please ?

	tglx


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