lkml.org 
[lkml]   [2004]   [Mar]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: CONFIG_PREEMPT and server workloads
On Thu, Mar 18, 2004 at 04:28:16PM +0100, Takashi Iwai wrote:
> the above one is the major source of RT-latency.
> only this oneliner will reduce more than 90% of RT-latencies.
> in my case with reiserfs, i got 0.4ms RT-latency with my test suite
> (with athlon 2200+).

cool ;)

> there is another point to be fixed in the reiserfs journal
> transaction. then you'll get 0.1ms RT-latency without preemption.

[..]

> i think the first one is needed for preemptive kernel, too.
> with these patches, also 0.1-0.2ms RT-latency is achieved.

amazing.

And without those improvements you did, the worst case for 2.6 mainline
is 8msec, right?

thanks for the great work on lowlatency. I'm sure Andrew will pick those
improvements immediatly :).
-
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 14:01    [W:0.167 / U:0.140 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site