Messages in this thread | | | Date | Mon, 27 Feb 2006 17:21:52 -0500 | From | "Bill Rugolsky Jr." <> | Subject | Re: AMD64 X2 lost ticks on PM timer |
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On Tue, Feb 28, 2006 at 12:22:40AM +0300, bubshait wrote: > Losing some ticks... checking if CPU frequency changed. > warning: many lost ticks. > Your time source seems to be instable or some driver is hogging interupts > rip __do_softirq+0x47/0xd1 > > adding report_lost_ticks only prints repeating messages like > > Lost 3 timer tick(s)! rip __do_softirq+0x47/0xd1
I'm seeing tons of these on a Tyan 2895 (Nvidia CKO4) running FC4 with kernel-2.6.15-1.1830 (2.6.15.2) SMP:
time.c: Lost 1 timer tick(s)! rip default_idle+0x37/0x7a) time.c: Lost 2 timer tick(s)! rip __do_softirq+0x55/0xd4)
[I've seen the same thing with earlier FC 2.6.14 kernels.]
On our systems the __do_softirq messages are strongly correlated with sata_nv interrupts, especially during our nightly tripwire-like fs checksum job. Unfortunately, the log messages are not very informative. I'm not sure what ever happened to the following patch,
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.5/2.5.64/2.5.64-mm3/broken-out/report-lost-ticks.patch
but it was dropped.
Unfortunately, I need to spend tomorrow patching kernels in search of a fix or workaround, as I have to start using these boxes in production, and they need to keep time.
Regards,
Bill Rugolsky - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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