Messages in this thread | | | Date | Tue, 21 Feb 2012 05:36:22 +0530 | From | Srivatsa Vaddagiri <> | Subject | Re: sched: Avoid SMT siblings in select_idle_sibling() if possible |
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* Mike Galbraith <efault@gmx.de> [2012-02-20 19:25:43]:
> > I can give that a try for my benchmark and see how much it helps. My > > suspicion is it will not fully solve the problem I have on hand. > > I doubt it will either. Your problem is when it doesn't succeed, but > you have an idle core available in another domain.
fwiw the patch I had sent does a wakeup balance within prev_cpu's cache_domain (and not outside). It handles the case where we don't have any idle cpu/core within prev_cpu's cache domain, in which case we look for next best thing (least loaded cpu). I did see good numbers with that (for both my benchmark and sysbench).
More on this later in the day ..
- vatsa
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