lkml.org 
[lkml]   [2012]   [Feb]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: TCP_STREAM performance regression on commit b3613118
From
Date
On Fri, 2012-02-17 at 13:33 -0500, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@gmail.com>
> Date: Fri, 17 Feb 2012 10:50:39 +0100
>
> > Le vendredi 17 février 2012 à 16:18 +0800, Alex,Shi a écrit :
> >> The tcp_stream loop back performance has about 10% drop on the
> >> commitment on our core2 2 sockets server. This commit has 2
> >> parents(7505afe28, 5983fe), but both of them have no regression. So
> >> guess the impact just happened when this 2 parents joint. That beyond
> >> our capability to dig it more.
> >>
> >> Any ideas?
> >
> > Most probably the more accurate truesize determination is responsible of
> > this tcp regression, since some prior assumptions might be wrong.
> >
> > Want to give more information on the workload ?
> > Is it a 32 or 64 bit kernel ?

It is 64 bit kernel. Currently we only care 64bit.

Will try to bring more statistic after our lab recovered.
>
> And let's start CC:'ing netdev too.


--
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: 2012-02-20 02:49    [W:0.071 / U:3.644 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site