number of CPUs and IPI panic

[Julian Elischer]

you can remove a lot of the IPIs by turning off
sysctl kern.sched.ipiwakeup.enabled   (if it's turned on)


Nik Azim Azam wrote:

>sorry for not posting this information earlier.
>
>i'm running on SCHED_4BSD, with PREEMPTION. the same
>panic occours without PREEMPTION. the kernel is
>generic except that i've removed some devices that i
>dont need.
>
>--- Gavin Atkinson <gavin.atkinson at ury.york.ac.uk>
>wrote:
>
>  
>
>>On Wed, 20 Oct 2004, Nik Azim Azam wrote:
>>
>>    
>>
>>>hello list,
>>>
>>>i'm doing some testing on a 6 cpu pentium II
>>>      
>>>
>>overdrive
>>    
>>
>>>computer with 6-CURRENT. with 6 cpus, the system
>>>      
>>>
>>will
>>    
>>
>>>panic easily with moderate load (previous IPI is
>>>stuck). i edited sys/i386/sys/param.h file and
>>>      
>>>
>>lowered
>>    
>>
>>>the MAXCPU to 4. now the system is running with 4
>>>      
>>>
>>cpus
>>    
>>
>>>and it survived a make buildworld + portupgrade at
>>>      
>>>
>>the
>>    
>>
>>>same time.
>>>
>>>is this a known problem? i can give more
>>>      
>>>
>>information
>>    
>>
>>>if anyone interested.
>>>      
>>>
>>Are you using SCHED_ULE? (I believe it's the default
>>in 6-CURRENT...)
>>
>>If so, try with SCHED_4BSD. ULE has known problems
>>at the moment.
>>
>>Gavin
>>
>>    
>>
>
>
>
>		
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>