Re: Kernel 2.4.x and 2.4.1-preX - Higher latency then 2.2.x kernels?

Gregory Maxwell
2001-01-20T19:59:42Z

On Sat, Jan 20, 2001 at 02:50:16PM -0500, Shawn Starr wrote:
> It just seems that since using 2.4 ive noticed my poor Pentium 200Mhz
> slow down whether being in X or otherwise. It just seems that the system
> is sluggish.
>
> I am using the new ReiserFS filesystem and I do know its still in heavy
> development perhaps my latency is due to this (?)

Reiserfs uses much more complex data structures then ext2 (trees..). I don't
think that latency has ever been a design criteria and all of the benchmarks
they use are pretty much pure throughput tests.

So it wouldn't be really surprising if reiserfs had very bad latency. You
should apply the timepegs patch and profile your kernel latency to see where
it's coming from.