9.0 spontaneously reboots

[Volodymyr Kostyrko]

Matthew Seaman wrote:
> On 13/03/2012 08:59, Volodymyr Kostyrko wrote:
>> The only other weird thing about this server is:
>>
>> dev.cpu.0.temperature: 37,0C
>> dev.cpu.1.temperature: 37,0C
>> dev.cpu.2.temperature: 35,0C
>> dev.cpu.3.temperature: 35,0C
>> dev.cpu.4.temperature: 43,0C
>> dev.cpu.5.temperature: 43,0C
>> dev.cpu.6.temperature: 38,0C
>> dev.cpu.7.temperature: 38,0C
>> dev.cpu.8.temperature: 38,0C
>> dev.cpu.9.temperature: 38,0C
>> dev.cpu.10.temperature: 37,0C
>> dev.cpu.11.temperature: 37,0C
>> dev.cpu.12.temperature: 33,0C
>> dev.cpu.13.temperature: 33,0C
>> dev.cpu.14.temperature: 34,0C
>> dev.cpu.15.temperature: 34,0C
>>
>> And it's consistent - cores 4 and 5 always are hotter then any other.
>> This can be something with scheduler, however this started before any
>> actual load. Though numbers are normal I had never seen something alike...
>
> Two cores per socket, and 8 sockets on the board?  If so, that looks
> absolutely fine to me.  The average temperature is 36.8C but 43.0C is
> still well within spec.  That difference of just over 6 degrees is not
> really significant and probably entirely due to different airflow
> patterns over the different CPU sockets.  If you swap the CPU package in
> that socket with one of the other ones, you'll find the hot spot stays
> put.  You might be able to even things out by rerouteing cables, but
> really it's not worth the hassle and won't make any perceptible
> difference to performance.

Nope:

CPU: Intel(R) Xeon(R) CPU           E5620  @ 2.40GHz (2394.05-MHz 
K8-class CPU)
FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs
FreeBSD/SMP: 2 package(s) x 4 core(s) x 2 SMT threads

So the difference is about one physical core with two SMT threads.

-- 
Sphinx of black quartz judge my vow.