[lkml]   [2005]   [Aug]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Where is the performance bottleneck?
Holger Kiehl wrote:
> On Mon, 29 Aug 2005, Al Boldi wrote:
> > You may be hitting a 2.6 kernel bug, which has something to do with
> > readahead, ask Jens Axboe about it! (see "[git patches] IDE update"
> > thread) Sadly, 2.6.13 did not fix it either.
> I did read that threat, but due to my limited understanding about kernel
> code, don't see the relation to my problem.

Basically the kernel is loosing CPU cycles while accessing bockdevices.
The problem shows most when the CPU/DISK ratio is low.
Throwing more CPU cycles at the problem may seemingly remove this bottleneck.

> But I am willing to try any patches to solve the problem.

No patches yet.

> > Did you try 2.4.31?
> No. Will give this a try if the problem is not found.

Keep us posted!

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-08-31 06:34    [W:0.051 / U:5.900 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site