lkml.org 
[lkml]   [2012]   [Jul]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] sched/numa: recovered SD_PERFER_SIBLING on CPU domain
From
Date
On Fri, 2012-07-20 at 14:19 +0800, Alex Shi wrote:
> commit 8e7fbcbc22c(sched: Remove stale power aware scheduling remnants
> and dysfunctional knobs) removed SD_PERFER_SIBLING on CPU domain
> On numa machine, that causes load_balance didn't perfer LCPU in same
> physical CPU package.
>
> It causes some regression on our numa machines from core2 to NHM and SNB.
> Recover this domain flag can recover the performance drop.
>
> This recovery doesn't has any bad impact on my all benchmarks specjbb,
> kbuild, fio, hackbench .. etc, on all my machines.
> Since it is a recovery, I assume it also has no bad impact for other
> platforms.
>
> Signed-off-by: Alex Shi <alex.shi@intel.com>

Thanks!


\
 
 \ /
  Last update: 2012-07-20 15:41    [W:0.145 / U:0.440 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site