Subject: Re: AMD X2 unsynced TSC fix?
From: Sergio Monteiro Basto <sergio@sergiomb.no-ip.org>
Reply-To: sergio@sergiomb.no-ip.org
To: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: Andi Kleen <ak@suse.de>, Lee Revell <rlrevell@joe-job.com>,
       Chris Friesen <cfriesen@nortel.com>,
       linux-kernel <linux-kernel@vger.kernel.org>,
       john stultz <johnstul@us.ibm.com>, len.brown@intel.com
In-Reply-To: <20061031184411.E3790@unix-os.sc.intel.com>
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Date: Wed, 08 Nov 2006 00:22:19 +0000
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On Tue, 2006-10-31 at 18:44 -0800, Siddha, Suresh B wrote:

> First of all, from "lost timer ticks" messages and the fact that "notsc"
> decreases the number of ticks lost can't be concluded as a TSC sync issue=
.

ok, but without notsc it is a nightmare=20

>=20
> Some device is hogging interrupts which results in lost timer ticks and f=
rom
> your 2.6.18 interrupts info, usb seems to be the culprit.. It is probably
> a side effect that "notsc" decreases the lost timer ticks..

I begging use net with Ethernet instead usbnet and reduce a little the
problems (I can have nvidia DRI working without problems or oops) but
still appear the same lost tickets.

> copied Len who seems to be the owner of the bug for his thoughts..
> (http://bugzilla.kernel.org/show_bug.cgi?id=3D6419)=20

I had update bugzilla with dmesg from 2.6.19-RC4-mm2, which already came
with the latest release of hrtimers, because for the first time I could
boot without hang on boot, with hrtimers and without notsc boot option.
But it have a long long oops that maybe could give you some clues.

http://bugzilla.kernel.org/show_bug.cgi?id=3D6419#c55


Thanks,=20

--=20
S=E9rgio M.B.

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