Messages in this thread |  | | Date | Wed, 14 Sep 2011 00:05:02 +0530 | | From | Srivatsa Vaddagiri <> | | Subject | Re: CFS Bandwidth Control - Test results of cgroups tasks pinned vs unpinnede |
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* Peter Zijlstra <a.p.zijlstra@chello.nl> [2011-09-13 20:30:46]:
> On Tue, 2011-09-13 at 23:58 +0530, Srivatsa Vaddagiri wrote: > > * Peter Zijlstra <a.p.zijlstra@chello.nl> [2011-09-13 20:19:55]: > > > > > On Tue, 2011-09-13 at 23:24 +0530, Srivatsa Vaddagiri wrote: > > > > We saw considerably high migration count on latest tip compared to > > > > previous kernels. Kamalesh, can you please post the migration count > > > > data? > > > > > > Hrmm, yes this looks horrid.. even without cgroup crap, something's funny. > > > > Yes ..we could visualize that very much in top o/p .. A task's cpu would keep > > changing *every* screen refresh (refreshed every 0.5 sec that too!). > > > > We didn't see that with older kernels ..Kamalesh is planning to do a > > git bisect and see which commit lead to this "mad" hopping .. > > Awesome, thanks! Btw, what is 'older'? 3.0?
We went back all the way upto 2.6.32! I think 2.6.38 and 2.6.39 were pretty stable ..I don't have the migration count data with me readily. I will let Kamalesh post that info soon.
- vatsa
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