lkml.org 
[lkml]   [2007]   [May]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Remove constructor from buffer_head
On Thu, 3 May 2007, Andrew Morton wrote:

> On Thu, 3 May 2007 20:08:41 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote:
>
> > Performance tests show a slight improvements in netperf (not a
> > strong case for a performance improvement but removing the
> > constructor has definitely no negative impact so why keep
> > this around?).
> >
> > TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to localhost (127.0.0.1) port 0 AF_INET
> > Recv Send Send
> > Socket Socket Message Elapsed
> > Size Size Size Time Throughput
> > bytes bytes bytes secs. 10^6bits/sec
> >
> > Before:
> > 87380 16384 16384 10.01 6026.04
> > 87380 16384 16384 10.01 5992.17
> > 87380 16384 16384 10.01 6071.23
> >
> > After:
> > 87380 16384 16384 10.01 6090.20
> > 87380 16384 16384 10.01 6078.3
> > 87380 16384 16384 10.00 6013.52
>
> How could a filesystem change affect networking performance?
>
> The change looks nice, but I'd microbenchmark it with a write-to-ext2-on-ramdisk
> or something like that.

Hmmmm.. I was told in another thread that this is the most frequently used
slab for this benchmark ...... Just accepted that as true.

-
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: 2007-05-04 05:37    [W:0.948 / U:0.036 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site