lkml.org 
[lkml]   [2012]   [Feb]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC] Extend mwait idle to optimize away IPIs when possible
On Tue, Feb 14, 2012 at 02:52:17PM +0100, Peter Zijlstra wrote:
> On Mon, 2012-02-13 at 13:34 +0800, Yong Zhang wrote:
> > Yeah, most of the things could be shared. Such as the added logic when
> > return from idle and the hooks into ttwu_queue_remote() and
> > generic_exec_single().
> >
>
> The thing is, those last two should not have hooks.

Yeah, it's general place; and smp_need_ipi() plays well.

> Nor am I convinced
> anything outside of the arch idle loop should have any.

'idle loop' is the key point :)

Thanks,
Yong


\
 
 \ /
  Last update: 2012-02-15 03:03    [from the cache]
©2003-2011 Jasper Spaans