Messages in this thread | | | Subject | Re: Failing back to INSANE timesource :) Time stopped today. | From | john stultz <> | Date | Wed, 14 Apr 2004 11:36:44 -0700 |
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On Wed, 2004-04-14 at 01:54, Niclas Gustafsson wrote: > Now it happened again, with my newly compiled kernel, I've attached the > config file and dmesg for this kernel. > > Watching the /proc/interrupts with 10s apart after the "stop". > > [root@s151 root]# more /proc/interrupts > CPU0 > 0: 66413955 local-APIC-edge timer > 2: 0 XT-PIC cascade > 9: 1 IO-APIC-level acpi > 10: 0 IO-APIC-level ohci_hcd > 14: 24 IO-APIC-edge ide0 > 20: 31244 IO-APIC-level aic7xxx > 22: 19652139 IO-APIC-level eth0 > NMI: 0 > LOC: 67379568 > ERR: 0 > MIS: 0 > > And some 10-15 min later: > > [root@s151 root]# cat /proc/interrupts > CPU0 > 0: 66413964 local-APIC-edge timer > 2: 0 XT-PIC cascade > 9: 1 IO-APIC-level acpi > 10: 0 IO-APIC-level ohci_hcd > 14: 24 IO-APIC-edge ide0 > 20: 31245 IO-APIC-level aic7xxx > 22: 19754446 IO-APIC-level eth0 > NMI: 0 > LOC: 68366976 > ERR: 0 > MIS: 0
Wow, clearly something is going wrong with interrupt delivery. You only received 9 timer interrupts in 10 seconds!
> Worth noticing is the extreme increase in interrupts and context > switches on the last output line from vmstat, however if this is a true > picture of what happened or not I cannot say. Maybe this is just a > result of timing problems? > > However I see an increase in network activity just before the stop, the > system goes from 2 Mbps output to about 55 Mbps on the last read. (Also > read from this machine so I don't know about it's validity)
Yea, those values are both junk as the X/sec ratio is totally skewed.
> Where can I see what the system is currently using as a timing source > (TSC/HPET/PIT etc.)?
Note the "Using tsc for high-res timesource" in your dmesg.
I'm working now to reproduce this w/ a 2G system here in our lab, and just for completeness, could you also send me your BIOS revision number?
thanks -john
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