lkml.org 
[lkml]   [2014]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [Query]: tick-sched: why don't we stop tick when we are running idle task?
On Mon, Apr 14, 2014 at 05:22:30PM +0530, Viresh Kumar wrote:
> On 14 April 2014 17:17, Peter Zijlstra <peterz@infradead.org> wrote:
> > What causes this tick? I was under the impression that once there's a
> > single task (not doing any syscalls) and the above issues are sorted, no
> > more tick would happen.
>
> This is what Frederic told me earlier:
>
> https://lkml.org/lkml/2014/2/13/238

That's a bit of a non-answer. I'm fairly sure its not a gazillion
issues, since the actual scheduler tick doesn't actually do that much.

So start by enumerating what is actually required.

The 2), which I suppose you're now trying to implement is I think
entirely the wrong way. The tick really assumes it runs local, moving it
to another CPU is insane.


\
 
 \ /
  Last update: 2014-04-14 14:21    [W:0.235 / U:0.348 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site