lkml.org 
[lkml]   [2009]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [bisected] pty performance problem

* Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:

> On Sun, 22 Nov 2009 07:39:26 +0100
> Ingo Molnar <mingo@elte.hu> wrote:
>
> >
> > (Cc:-ed Alan and Linus - mail repeated below. eot.)
>
> I saw it and replied already. The kernel now queues the work for the
> pty as it does normal tty devices. If the CPU load is that low and
> nothing else is happening it makes me wonder what the scheduler thinks
> it is doing ?

Would be nice to see the testcase, but by the looks if it there appears
to be a jiffy delay somewhere - not a scheduler delay. On an idle box
the scheduler will run any runnable tasks, with no delay.

Ingo


\
 
 \ /
  Last update: 2009-11-22 13:45    [from the cache]
©2003-2011 Jasper Spaans