stas at FreeBSD.org
Tue Sep 9 13:56:13 UTC 2008
On Tue, 9 Sep 2008 15:33:30 +0200
"Jacques Fourie" <jacques.fourie at gmail.com> mentioned:
> I've performed some benchmark tests on my Gumstix Connex 400 (Intel
> Xscale PXA 255 CPU clocked at 400MHz) with a netDuo expansion board.
> This board has two smc network interfaces. I configure the gumstix as
> a router and measure network throughput with netperf running on
> seperate boxes on either side of the gumstix. My initial tests showed
> a TCP throughput of 2Mbit/s. After adapting the smc driver to use DMA
> this figure went up to 7Mbit/s. Although this is a significant
> improvement, it still seems to be a bit slow. Does anyone have any
> tips on how I can go about to try and figure out where the bottleneck
> lies? Initial profiling showed that a significant amount of time was
> spent doing memory to memory copies of data, but after the DMA change
> profiling does not show any obvious culprits.
Have you tried checking the speed of the interface itself? Without
routing involved? May it be the interfaces itself being so slow?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Size: 195 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-arm/attachments/20080909/dc82ca9e/attachment.pgp
More information about the freebsd-arm