lkml.org 
[lkml]   [2006]   [Dec]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: realtime-preempt and arm
Ingo Molnar <mingo@elte.hu> wrote:
> tike64 <tike64@yahoo.com> wrote:
> > Ok, understood; I tried this:
> >
> > t = raw_timer();
> > ts.tv_nsec = 5000000;
> > ts.tv_sec = 0;
> > nanosleep(&ts, 0);
> > t = raw_timer() - t;
> >
> > It is better but I still see 8ms occasional delays when listing
> > nfs-mounted directories onto FB. And, what is funny, also this
> > version makes the average delay 20ms as if it made the jiffy 20ms.
>
> ARM has no high resolution timers support yet in the -rt tree.

Yes, but is there a reason why the -rt patch seems to make the 10ms
jiffy 20ms and why the jitter is so high. I don't need high resolution
but reasonable, a couple of milliseconds, jitter.

--

tike




____________________________________________________________________________________
Cheap talk?
Check out Yahoo! Messenger's low PC-to-Phone call rates.
http://voice.yahoo.com
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-12-14 11:29    [W:0.030 / U:0.144 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site