Re: [RFC] sched: The removal of idle_balance()

From: Steven Rostedt
Date: Mon Feb 18 2013 - 10:23:15 EST

On Mon, 2013-02-18 at 04:42 +0100, Mike Galbraith wrote:
> On Sun, 2013-02-17 at 16:54 -0500, Steven Rostedt wrote:
> > On Sun, 2013-02-17 at 08:14 +0100, Mike Galbraith wrote:
> >
> > > (And puts a dent in x264 ultrafast)
> > What about my last patch? The one that avoids idle_balance() if the
> > previous task was in a task_uninterruptible state. That one gave the
> > same performance increase that removing idle_balance() did on my box.
> I didn't try it, figuring it was pretty much the same as turning it off,
> but just did. Patch (-typo) has no effect on either x264 or hackbench
> (surely will for -rt, but rt tasks here aren't sent to burn in rt hell).

So it had no effect to your tests? That's actually good, as if it has a
positive effect on some workloads and no effect on others, that's still
a net win.

-- Steve

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