linux-kernel - Re: AMD X2 unsynced TSC fix?

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Date:	Tue, 31 Oct 2006 15:05:04 +0000
From:	Sergio Monteiro Basto <sergio@...giomb.no-ip.org>
To:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>
Cc:	Andi Kleen <ak@...e.de>, Lee Revell <rlrevell@...-job.com>,
	Chris Friesen <cfriesen@...tel.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	john stultz <johnstul@...ibm.com>
Subject: Re: AMD X2 unsynced TSC fix?

On Mon, 2006-10-30 at 18:41 -0800, Siddha, Suresh B wrote:
> On Tue, Oct 31, 2006 at 12:03:28AM +0000, Sergio Monteiro Basto wrote:
> > time.c: Lost 300 timer tick(s)! rip mwait_idle+0x33/0x4f)
> > time.c: Lost 300 timer tick(s)! rip mwait_idle+0x33/0x4f)
> > time.c: Lost 300 timer tick(s)! rip mwait_idle+0x33/0x4f)
> > time.c: Lost 300 timer tick(s)! rip mwait_idle+0x33/0x4f)
> 
> Is this the reason why you are saying your system has unsynchronized TSC?

yes 

> Some where in this thread, you mentioned that Lost ticks happen even
> when you use  "notsc"

yes, with news kernels 2.6.19-rcx

> 
> This sounds to me as a different problem. Can you send us the output
> of /proc/interrupts?

of which kernel ?
I am not at home .. 
but I have here /proc/interrupts from one 2.6.16 
http://bugzilla.kernel.org/attachment.cgi?id=7927&action=view
from my bug 
http://bugzilla.kernel.org/show_bug.cgi?id=6419

Tonight I can attach on bugzilla bug#6419, /proc/interrupts from one
kernel 2.6.18 and from one kernel 2.6.19-rc4 

BTW: those kernels are for x86_64 arch, I haven't try, yet, i386, but
maybe will be my next test. 

Thanks, 
--
Sérgio M. B.
> 
> thanks,
> suresh

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