lkml.org 
[lkml]   [2003]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch] e1000 TSO parameter

Hi,

> > So we get almost 15% of throughput drop. This was with plain "netkit
> > fptd". AFAIK, it does a simple read/write loop (not sendfile()).

We've been seeing rather variable results for TSO as well. With TSO off
netperf TCP_STREAM will hit line speed and stay there. With TSO on
some runs will hit line speed and others will be about 100Mbit/sec
slower.

> When we use TSO for non-sendfile() applications it really
> stresses memory allocations. We do these 64K+ kmalloc()'s
> for each packet we construct.

Yep we definitely noticed much more higher allocations when watching
/proc/slab. Playing around with slab tuning didnt seem to help.

Anton
-
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: 2005-03-22 13:47    [W:0.074 / U:0.544 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site