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

[Mike Galbraith]

On Mon, 2012-02-20 at 20:07 +0100, Peter Zijlstra wrote: 
> On Mon, 2012-02-20 at 19:14 +0100, Mike Galbraith wrote:
> > Enabling SD_BALANCE_WAKE used to be decidedly too expensive to consider.
> > Maybe that has changed, but I doubt it.
> 
> Right, I through I remembered some such, you could see it on wakeup
> heavy things like pipe-bench and that java msg passing thing, right?

Yeah, it beat up switch heavy buddies pretty bad.

-Mike


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