From: thockin@hockin.org
To: Andi Kleen <ak@suse.de>
Cc: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@elte.hu>,
john stultz <johnstul@us.ibm.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RT] read_tsc: ACK! TSC went backward! Unsynced TSCs?
Date: Tue, 29 Nov 2005 08:52:19 -0800 [thread overview]
Message-ID: <20051129165219.GA12687@hockin.org> (raw)
In-Reply-To: <p73r78zh7kv.fsf@verdi.suse.de>
On Tue, Nov 29, 2005 at 07:06:24AM -0700, Andi Kleen wrote:
> But I'm surprised you're saying 2.6.11 broke. At least 2.6.11 64bit should
> have always used HPET in this case. I only broke it around 2.6.13
> where I added an overeager optimization for single socket DC on my side based
> on a misunderstanding. Earlier and later kernels should have been ok.
we didn't have HPET enabled in BIOS until recently. Turning that on made
all the TSC gettimeofday() crap disappear. Now to find and kill any
straggling users of rdtsc
next prev parent reply other threads:[~2005-11-29 16:47 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-11-28 12:05 [RT] read_tsc: ACK! TSC went backward! Unsynced TSCs? Steven Rostedt
2005-11-28 12:30 ` Jonas Oreland
2005-11-28 12:59 ` Steven Rostedt
2005-11-28 14:21 ` Ingo Molnar
2005-11-28 15:38 ` Lee Revell
2005-11-28 17:30 ` thockin
2005-11-28 17:39 ` Lee Revell
2005-11-28 18:30 ` Dave Jones
2005-11-28 18:35 ` thockin
2005-11-29 14:06 ` Andi Kleen
2005-11-29 16:52 ` thockin [this message]
2005-11-29 16:48 ` Andi Kleen
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