Messages in this thread | | | From | Chris Evans <> | Subject | CPU2 gone "missing" on 4 CPU box. | Date | Thu, 27 Mar 2003 14:30:02 +0000 |
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Hello-
I've got a very interesting problem with a 4 CPU box. I've never seen anything quite like it. After booting, all 4 CPUs seem to be available (e.g. /proc/cpuinfo sees them all), but one of them is never used for anything. It always stays at 100% idle. So it is effectively a 3 CPU box :-(
There is a highly suspicious entry in the kernel logs after bootup. It shows some differing values for the CPU which does not come up properly. Here is the entry:
cpu: 0, clocks: 996796, slice: 199359 CPU0<T0:996784,T1:797424,D:1,S:199359,C:996796> cpu: 1, clocks: 996796, slice: 199359 cpu: 2, clocks: 996796, slice: 199359 cpu: 3, clocks: 996796, slice: 199359 CPU2<T0:996784,T1:-133220960,D:133619667,S:199359,C:996796> CPU1<T0:996784,T1:598064,D:2,S:199359,C:996796> CPU3<T0:996784,T1:199344,D:4,S:199359,C:996796>
As you can see, CPU2 has some weird looking values for "T1" and "D", compared with CPU0, CPU1 and CPU3.
Has anyone seen anything like this?
The kernel is: Linux <snip> 2.4.9-e.12enterprise #1 SMP Tue Feb 11 01:29:18 EST 2003 i686 unknown
I'm not entirely sure what the hardware is because the machine is remote.
Thanks in advance. Chris
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