SCHED_ULE should not be the default
Attilio Rao
attilio at freebsd.org
Sat Dec 10 00:59:30 UTC 2011
2011/12/10 George Mitchell <george+freebsd at m5p.com>:
> On 12/09/11 10:17, Attilio Rao wrote:
>>
>> [...]
>>
>> More precisely I'd be interested in KTR traces.
>> To be even more precise:
>> With a completely stable GENERIC configuration (or otherwise please
>> post your kernel config) please add the following:
>> options KTR
>> options KTR_ENTRIES=262144
>> options KTR_COMPILE=(KTR_SCHED)
>> options KTR_MASK=(KTR_SCHED)
>>
>> While you are in the middle of the slow-down (so once it is well
>> established) please do:
>> # sysclt debug.ktr.cpumask=""
>
>
> wonderland# sysctl debug.ktr.cpumask=""
> debug.ktr.cpumask: ffffffffffffffff
> sysctl: debug.ktr.cpumask: Invalid argument
>
>
>>
>> In the end go with:
>> # ktrdump -ctf> ktr-ule-problem.out
>
>
> It's 44MB, so it's at http://www.m5p.com/~george/ktr-ule-problem.out
What svn revision did you use for it?
What is the CPUs frequencies of machines generating this?
Attilio
--
Peace can only be achieved by understanding - A. Einstein
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