Re: fast clock wreaks havoc on amd64 dual core - hp1250n
On 11:35 Sat 22 Oct , Richard Mace wrote:
> Nathan,
>
> I can empathise. I have a two week old HP NX6125 notebook that also suffers
> from the same problem. I think that you have identified the bug correctly as
> #3927. I've just checked bugzilla.kernel.org/show_bug.cgi?id=3927 and the
> status is ASSIGNED. The owner is Andi Kleen (at suse). As far as I can tell
> there are some patches available, but none deemed "stable" enough to
> incorporate into current kernels.
>
The ChangeLog-2.6.14-rc5 has this fix for TSC timers:
Author: Andi Kleen <ak@suse.de>
Date: Thu Oct 13 14:41:44 2005 -0700
[NET]: Disable NET_SCH_CLK_CPU for SMP x86 hosts
Opterons with frequency scaling have fully unsynchronized TSCs
running at different frequencies, so using TSCs there is not a good idea.
Also some other x86 boxes have this problem. gettimeofday should be
good enough, so just disable it.
Signed-off-by: Andi Kleen <ak@suse.de>
I have had the 'lost ticks' problem with AMD x2 dual cpu and SMP. Now i
am running kernel-2.6.14-rc5 and the problem appears fixed.
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