Messages in this thread | | | From | Vincent Guittot <> | Date | Fri, 5 May 2017 15:32:26 +0200 | Subject | Re: [RFC PATCHSET v2] sched/fair: fix load balancer behavior when cgroup is in use |
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On 5 May 2017 at 15:28, Tejun Heo <tj@kernel.org> wrote: > Hello, Vincent. > > On Fri, May 05, 2017 at 10:46:53AM +0200, Vincent Guittot wrote: >> schbench results looks better with this version >> Latency percentiles (usec) >> 50.0000th: 212 >> 75.0000th: 292 >> 90.0000th: 385 >> 95.0000th: 439 >> *99.0000th: 671 >> 99.5000th: 7992 >> 99.9000th: 12176 >> min=0, max=14855 >> >> p99 is back to a normal value but p99.5 stays higher than mainline > > By how much and is that with the weight adjustment on the cgroup? I > can't get reliable numbers on p99.5 and beyond on my test setup. I > ordered the hikey board and will try to replicate your setup once it > arrives.
This is the results that I got when i tested you 1st version last week:
With v4.11-rc8. I have run 10 times the test and get consistent results schbench -m 2 -t 4 -s 10000 -c 15000 -r 30 Latency percentiles (usec) 50.0000th: 255 75.0000th: 350 90.0000th: 454 95.0000th: 489 *99.0000th: 539 99.5000th: 585 99.9000th: 10224 min=0, max=13567
> >> I have also checked load_avg and runnable_load_avg value and there is >> something incorrect. I will provide details on the related patch > > Sure, will respond there. > > Thanks. > > -- > tejun
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