Messages in this thread | | | Subject | Re: find_busiest_group using lots of CPU | From | Peter Zijlstra <> | Date | Tue, 06 Oct 2009 14:04:21 +0200 |
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On Tue, 2009-10-06 at 13:20 +0200, Jens Axboe wrote: > > > io_schedule() straight into find_busiest_group() leads me to think this > > > could be SD_BALANCE_NEWIDLE, does something like: > > > > > > for i in /proc/sys/kernel/sched_domain/cpu*/domain*/flags; > > > do > > > val=`cat $i`; echo $((val & ~0x02)) > $i; > > > done > > > > > > [ assuming SCHED_DEBUG=y ] > > > > > > Cure things? > > > > I can try, > > It does, it's gone from the profiles.
Hrmm,. ok. I'll go prod at the NEWIDLE bits to see if anything stands out.
If only perf-annotate could generate annotated C... maybe I'll look at that.
Thanks!
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