lkml.org 
[lkml]   [2006]   [Mar]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Ocfs2 performance bugs of doom
From
Date
Mark Fasheh <mark.fasheh@oracle.com> writes:

> On Sun, Mar 05, 2006 at 08:59:50PM -0800, Daniel Phillips wrote:
> > So that hack apparently improves the bucket distribution quite a bit, but
> > look, the bad old linear systime creep is still very obvious. For that
> > there is no substitute for lots of buckets.
> Yes, I think the way to go right now is to allocate an array of pages and
> index into that. We can make the array size a mount option so that the
> default can be something reasonable ;)

Did you actually do some statistics how long the hash chains are?
Just increasing hash tables blindly has other bad side effects, like
increasing cache misses.

-Andi
-
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: 2006-03-07 04:42    [W:0.350 / U:1.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site