SMP and NTPD
Eric Mader
emader at icu-project.org
Fri Apr 14 03:40:18 UTC 2006
Jeff Vian wrote:
> On Wed, 2006-04-12 at 14:40 -1000, Eric Mader wrote:
>> I also noticed the following in /var/log/messages:
>>
>> Apr 11 09:21:19 localhost kernel: warning: many lost ticks.
>> Apr 11 09:21:19 localhost kernel: Your time source seems to be instable
>> or some driver is hogging interupts
>>
>>
>> I'll bet this has something to do w/ the problem. (:-) Does anybody know
>> how to figure out what this is about?
>>
>> (I have a vague memory of having seen the same problem w/ the SMP kernel
>> on a P4 w/ hyperthreading. On this system it was so bad that the whole
>> system would lock up. My AMD keeps chugging along, more or less.)
>>
> The kernel 2.6.11-1.1369_FC4smp is ancient! I believe that was the
> kernel FC4 was released with.
>
> Have you tried updating the system to the latest software to see if the
> problem you describe may have been fixed at some point in the last 7
> months?
>
Updating to kernel 2.6.16-1.2069_FC4smp seems to have fixed the problem.
I've been running for over an hour now, and the time seems to be rock-solid:
remote refid st t when poll reach delay offset
jitter
==============================================================================
+64-112-189-11.c 204.152.184.72 2 u 47 128 377 142.229 -3.746
1.081
-gumdrop.n-conne 208.245.212.8 3 u 110 128 377 136.707 -7.827
8.428
*dsl081-199-165. .GPS. 1 u 54 128 377 142.271 -1.350
3.965
+time2.apple.com 17.254.1.71 3 u 117 128 377 76.349 -0.071
2.300
Regards,
Eric
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