Re: [RFC][PATCH 0/7] sched: select_idle_siblings rewrite

From: Chris Mason
Date: Wed May 25 2016 - 13:12:24 EST

On Wed, May 25, 2016 at 06:24:49PM +0200, Peter Zijlstra wrote:
On Wed, May 25, 2016 at 10:51:20AM -0400, Chris Mason wrote:
On Mon, May 09, 2016 at 12:48:07PM +0200, Peter Zijlstra wrote:
> Hai,
> here be a semi coherent patch series for the recent select_idle_siblings()
> tinkering. Happy benchmarking..

This took a while, mostly because my original schbench showed your
patches were just as fast as our internal patch, but our production
benchmark showed a 5-10% regression. My theory was just that schbench
wasn't fine grained enough, and the load would stop before the
regression kicked in.

Just to be sure; regression as per your production kernel, not vs.
mainline, right?

Sorry yes, that's correct.