Messages in this thread | | | Date | Sat, 21 May 2005 16:54:06 -0400 | From | Scott Robert Ladd <> | Subject | Re: False "lost ticks" on dual-Opteron system (=> timer twice as fast) |
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Bernd Paysan <bernd.paysan@gmx.de> wrote: >>I've recently set up a dual Opteron RAID server (AMD-8000-based Tyan >>Thunder K8S Pro SCSI board, 2 246 Opterons, stepping 10). Kernel is a >>modified 2.6.11.4-20a from SuSE 9.3 (SMP version, sure). The Opterons >>are capable of changing the CPU frequency (between 1GHz and 2GHz). >> >>What I can't believe is that I'm the only one who has this problem.
Hendrik Visage wrote: > I'll be delving deeper into this thread soon, but I'm seeing similar > strangeness > on a Athlon64 (rated:3G+ real:2009MHz clock), 2.6.11-r8 (gentoo), MSI > K8N Neo Platinum. > > ntp syncs time, then I start a couple of compiles, and I see ntp > losing track of time, big jitter etc. (and the one time source is in > on the local LAN syncing to the same remote servers). openntp I > noticed it also. > > What I have noticed in my dmesg output is that I see "lost timer ticks > CPU Frequency change?" messages very early in the boot up. > > I've seen this for about a week or three, and somehow I believe it > wasn't a problem before 2.6.11.
I *don't* have any timer problems running 2.6.11-r8 (gentoo) on a dual Opteron 250 system using a Tyan K8W 2885. Perhaps the problem is that the two of you are running SCSI main drives, and I'm not?
..Scott
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