Re: Instability in Athlon64 X2 due to Usermode Speed Governor
From: Wes Newell (w.newell_at_TAKEOUTverizon.net)
Date: 08/08/05
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Date: Mon, 08 Aug 2005 16:35:59 GMT
On Mon, 08 Aug 2005 07:08:05 -0400, General Schvantzkoph wrote:
> I've had some instability problems with my new A64 X2 4400+ system.
> I've had a system crash and a kernel Make that failed with the error
> message that stated that there was an irreproducible error which was
> probably due to a hardware problem. On my console there was a number of
> messages saying that there were K8 Powernow Out of Sync errors.
>
> Aug 7 20:52:26 nimitz kernel: powernow-k8: error - out of sync, fid 0x2
> 0xe, vid 0x12 0xa
>
> I've changed the speed governor to Performance on both CPUs so that the
> processors will remain in sync and I haven't seen any problems since but
> it hasn't been long enough to tell if this has really fixed the problem.
>
> I'm running 32 bit FC3 with a custom 2.6.11.12 highmem SMP kernel (the
> Redhat 2.6.12-1.1372_FC3 doesn't work on this system due to the broken
> drivers for the nvsata and silsata drivers).
>
> The system is an Athlon 64 X2 4400+ with 4G of RAM and an MSI K8N Neo4
> platinum.
>
> Has anyone else seen stability problems with the X2?
Wish I had one to test. Maybe by years end. Your message makes sense
though, assuming you were running cpufreq with auto scaling where each cpu
would scale according to load if powernow didn't keep them in sync. You
might want to just disable cpufreq and set them manually with userspace
and see how that works. This would appear to be a cpufreg problem since it
controls the powernow settings. Maybe there'a something in the
cpufreqd.conf for multi proccessors to avoid them but I don't recall
anything in the version I've got on kernel 2.6.11-6mdk.
-- KT133 MB, CPU @2400MHz (24x100): SIS755 MB CPU @2330MHz (10x233) Need good help? Provide all system info with question. My server http://wesnewell.no-ip.com/cpu.php Verizon server http://mysite.verizon.net/res0exft/cpu.htm
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