lkml.org 
[lkml]   [2006]   [Dec]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [patch] speed up single bio_vec allocation
Date
> Chen, Kenneth wrote on Wednesday, December 06, 2006 10:20 AM
> > Jens Axboe wrote on Wednesday, December 06, 2006 2:09 AM
> > This is what I had in mind, in case it wasn't completely clear. Not
> > tested, other than it compiles. Basically it eliminates the small
> > bio_vec pool, and grows the bio by 16-bytes on 64-bit archs, or by
> > 12-bytes on 32-bit archs instead and uses the room at the end for the
> > bio_vec structure.
>
> Yeah, I had a very similar patch queued internally for the large benchmark
> measurement. I will post the result as soon as I get it.


Jens, this improves 0.25% on our db transaction processing benchmark setup.
The patch tested is (on top of 2.6.19):
http://marc.theaimsgroup.com/?l=linux-kernel&m=116539972229021&w=2

- Ken
-
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: 2006-12-08 23:17    [W:0.118 / U:0.096 seconds]
©2003-2014 Jasper Spaans. Advertise on this site