lkml.org 
[lkml]   [2014]   [Jan]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: [PATCH v2] net: Do not enable tx-nocache-copy by default
From
From: Benjamin Poirier <bpoirier@suse.de>
Date: Tue, 7 Jan 2014 10:11:10 -0500

> There are many cases where this feature does not improve performance or even
> reduces it.
>
> For example, here are the results from tests that I've run using 3.12.6 on one
> Intel Xeon W3565 and one i7 920 connected by ixgbe adapters. The results are
> from the Xeon, but they're similar on the i7. All numbers report the
> mean±stddev over 10 runs of 10s.
>
> 1) latency tests similar to what is described in "c6e1a0d net: Allow no-cache
> copy from user on transmit"
> There is no statistically significant difference between tx-nocache-copy
> on/off.
> nic irqs spread out (one queue per cpu)
...
> CC: Tom Herbert <therbert@google.com>
> Signed-off-by: Benjamin Poirier <bpoirier@suse.de>

Looks good, applied, thanks.
--
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: 2014-01-07 22:41    [W:0.058 / U:0.176 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site