lkml.org 
[lkml]   [2013]   [Dec]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] expand micro-optimizations in kernel to newer model CPUs
On Sun, Dec 15, 2013 at 04:42:50AM -0800, John wrote:
> I am using ANOVA to establish that the generic group differs from the
> optimized group.

You probably should run a couple other benchmarks, in addition, for
greater confidence that this optimization actually brings any palpable
improvement and is not just causing code bloat.

For example, last time I did a perf profile of a kernel build on AMD
F15h, the PILERDRIVER "optimization" was actually even a bit worse than
the standard MK8 one.

http://marc.info/?l=linux-kernel&m=138081947417204

--
Regards/Gruss,
Boris.

Sent from a fat crate under my desk. Formatting is fine.
--


\
 
 \ /
  Last update: 2013-12-15 14:41    [W:0.043 / U:0.172 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site