lkml.org 
[lkml]   [2008]   [Sep]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: How how latent should non-preemptive scheduling be?

* Sitsofe Wheeler <sitsofe@yahoo.com> wrote:

> cat-7717 [000] 1392.941867: __tasklet_schedule <-ath5k_intr
> cat-7717 [000] 1393.005963: __tasklet_schedule <-ath5k_intr
> cat-7717 [000] 1393.033222: __switch_to <-schedule
>
> Here a schedule seemingly doesn't happen for a few hundredths of a second...

that's about 60 msecs. ath5k_intr IRQ handling overhead? IRQ handlers
are non-preemptible. (even under CONFIG_PREEMPT=y)

Ingo


\
 
 \ /
  Last update: 2008-09-30 13:25    [from the cache]
©2003-2011 Jasper Spaans