lkml.org 
[lkml]   [2014]   [Dec]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 0/7] slub: Fastpath optimization (especially for RT) V1
On Wed, 17 Dec 2014, Joonsoo Kim wrote:

> Ping... and I found another way to remove preempt_disable/enable
> without complex changes.
>
> What we want to ensure is getting tid and kmem_cache_cpu
> on the same cpu. We can achieve that goal with below condition loop.
>
> I ran Jesper's benchmark and saw 3~5% win in a fast-path loop over
> kmem_cache_alloc+free in CONFIG_PREEMPT.
>
> 14.5 ns -> 13.8 ns
>
> See following patch.

Good idea. How does this affect the !CONFIG_PREEMPT case?


\
 
 \ /
  Last update: 2014-12-17 17:01    [W:0.093 / U:0.400 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site