SCHED_ULE should not be the default
george+freebsd at m5p.com
Wed Dec 14 11:06:50 UTC 2011
On 12/09/11 19:57, George Mitchell wrote:
> 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
There have been 22 downloads of this file so far; does anyone who
looked at it have any results to report?
Dear Secret Masters of FreeBSD: Can we have a decision on whether to
change back to SCHED_4BSD while SCHED_ULE gets properly fixed?
-- George Mitchell
>> and send the file to this mailing list.
> I hope this helps. -- George Mitchell
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