Re: sched: Avoid SMT siblings in select_idle_sibling() if possible

From: Peter Zijlstra
Date: Mon Mar 26 2012 - 04:36:06 EST


On Thu, 2012-03-22 at 21:02 +0530, Srivatsa Vaddagiri wrote:
>
> Now the more interesting VM scenario:
>
More interesting for whoem? I still think virt is an utter waste of
time ;-)

> tip tip + patch
>
> volano 1 1.29 (29% improvement)
> sysbench [n3] 1 2 (100% improvement)
> tbench 1 [n4] 1 1.07 (7% improvement)
> tbench 8 [n5] 1 1.26 (26% improvement)
> httperf [n6] 1 1.05 (5% improvement)
> Trade 1 1.31 (31% improvement)

That smells like there's more to the story, a 100% improvement is too
much..
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