Messages in this thread |  | | Date | Tue, 13 Sep 2011 10:35:24 +0530 | | From | Srivatsa Vaddagiri <> | | Subject | Re: CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinnede |
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* Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> [2011-09-13 10:33:06]:
> * Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com> [2011-09-13 09:45:45]: > > > * Peter Zijlstra <a.p.zijlstra@chello.nl> [2011-09-12 14:35:43]: > > > > > Of course it does.. and I bet you can improve that slightly if you > > > manage to fix some of the numerical nightmares that live in the cgroup > > > load-balancer (Paul, care to share your WIP?) > > > > Booting with "nohz=off" also helps significantly. > > > > With nohz=on, average idle time (over 1 min) is 10.3% > > With nohz=off, average idle time (over 1 min) is 3.9% > > Tuning min_interval and max_interval of various sched_domains to 1 [a]
Forgot to add footnote (a) earlier. min and max_interval tuned as below:
# cd /proc/sys/kernel/sched_domain # for i in `find . -name min_interval`; do echo 1 > $i; done # for i in `find . -name max_interval`; do echo 1 > $i; done
- vatsa
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