lkml.org 
[lkml]   [2004]   [Jul]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [patch] voluntary-preempt-2.6.8-rc2-L2, preemptable hardirqs
From
Date

> * Thomas Charbonnel <thomas@undata.org> wrote:
>
> > The other source of xrun was seen during the disk write tests, once
> > the memory runs out (spikes up to 14 ms, but more generally 6 ms)
>
> which particular filesystem and disk driver are you using? (ext3/IDE?)
> The 'disk write tests' are those of latencytest-0.5.4?
>
> Ingo

It's an IDE reiserfs disk.
Those are indeed the disk write tests from latencytest-0.5.4
My mistake about the spikes, they are more 3 ms than 6.
You can see the results here :
http://www.undata.org/~thomas/latencytest-0.5.4/rtc_freq_2048/
http://www.undata.org/~thomas/latencytest-0.5.4/rtc_freq_4096/
http://www.undata.org/~thomas/latencytest-0.5.4/rtc_freq_8192/

The traces always look the same :

T=29.6014 diff=14.4758
rtc_interrupt (+bd)
handle_IRQ_event (+50)
do_hardirq (+bc)
irqd (+ac)
kthread (+aa)
irqd (+0)
kthread (+0)
kernel_thread_helper (+5)


Thomas


-
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: 2005-03-22 14:04    [W:0.343 / U:0.392 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site