lkml.org 
[lkml]   [2012]   [Aug]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: changing timeslice in linux
From
Date
On Sun, 2012-08-19 at 11:58 -0700, Xin Tong wrote: 
> I have 2 questions about linux 2.6 x86_64 scheduler.
>
> 1. is the default scheduling algorithm SCHED_NORMAL in linux ?

Yes.

> 2. how do i change the time slice in linux source code ?

You shouldn't need to. You can tune "slice" by adjusting
sched_latency_ns and sched_min_granularity_ns, but note that "slice" is
not a fixed quantum. Also note that CFS preemption decisions are based
upon instantaneous state. A task may have received a full (variable)
"slice" of CPU time, but preemption will be triggered only if a more
deserving task is available, so a "slice" is not the "max uninterrupted
CPU time" that you may expect it to be.. but it is somewhat similar.

-Mike



\
 
 \ /
  Last update: 2012-08-20 08:41    [from the cache]
©2003-2011 Jasper Spaans