Messages in this thread | | | From | Martin Steigerwald <> | Subject | Re: BFS vs. mainline scheduler benchmarks and measurements | Date | Sat, 12 Sep 2009 13:26:29 +0200 |
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Am Freitag 11 September 2009 schrieb Mat: > Martin Steigerwald <Martin <at> lichtvoll.de> writes: > > Am Donnerstag 10 September 2009 schrieb Ingo Molnar: > > [snip] > > > > what is /debug/sched_features - is NO_NEW_FAIR_SLEEPERS set? If not > > > set yet then try it: > > > > > > echo NO_NEW_FAIR_SLEEPERS > /debug/sched_features > > > > > > that too might make things more fluid. > > Hi Martin,
Hi Mat,
> it made an tremendous difference which still has to be tested out :)
[...]
> Concerning that "NO_NEW_FAIR_SLEEPERS" switch - isn't it as easy as to > > do the following ? (I'm not sure if there's supposed to be another > debug) > > echo NO_NEW_FAIR_SLEEPERS > /sys/kernel/debug/sched_features > > which after the change says: > > cat /sys/kernel/debug/sched_features > NO_NEW_FAIR_SLEEPERS NO_NORMALIZED_SLEEPER ADAPTIVE_GRAN WAKEUP_PREEMPT > START_DEBIT AFFINE_WAKEUPS CACHE_HOT_BUDDY SYNC_WAKEUPS NO_HRTICK > NO_DOUBLE_TICK ASYM_GRAN LB_BIAS LB_WAKEUP_UPDATE ASYM_EFF_LOAD > NO_WAKEUP_OVERLAP LAST_BUDDY OWNER_SPIN > > I hope that's the correct switch ^^
Thanks. Appears to work here nicely ;-). I thought this might be a debug fs that I need to mount separately, but its already there here. I will see how it works out.
I wondered whethere it might be a good idea to have a
echo default > /sys/kernel/kernel-tuning-knob
that will reset it to the compiled in factory defaults. Would be a nice way to go back to safe settings again once you got carried away to far with trying those tuning knobs.
Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 [unhandled content-type:application/pgp-signature] | |