lkml.org 
[lkml]   [2007]   [Nov]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.24-rc2: Network commit causes SLUB performance regression with tbench
On Wed, 14 Nov 2007, David Miller wrote:

> > As a result, we may allocate more than a page of data in the
> > non-TSO case when exactly one page is desired.

Well this is likely the result of the SLUB regression. If you allocate an
order 1 page then the zone locks need to be taken. SLAB queues the a
couple of higher order pages and can so serve a couple of requests without
going into the page allocator whereas SLUB has to go directly to the page
allocator for allocate and free. I guess that needs fixing in the page
allocator. Or do I need to add a mechanism to buffer higher order page
allcoations to SLUB?


-
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: 2007-11-15 02:07    [W:0.079 / U:0.724 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site