Subject: Re: bus_dma'ed DEFTA driver committed.
To: Jason Thorpe <thorpej@nas.nasa.gov>
From: Matt Thomas <matt@3am-software.com>
List: port-pmax
Date: 05/27/1998 03:56:55
At 11:46 PM 5/26/98 , Jason Thorpe wrote:

> > matt@baker> mips.ttcp -t -s -f m -n 8192 -u 10.16.176.70
> > ttcp-t: buflen=8192, nbuf=8192, align=16384/0, port=5001  udp  -> 10.16.176.70
> > ttcp-t: socket
> > ttcp-t: 67108864 bytes in 12.60 real seconds = 40.63 Mbit/sec +++
> > ttcp-t: 8198 I/O calls, msec/call = 1.57, calls/sec = 650.62
> > ttcp-t: 0.2user 12.3sys 0:12real 99% 0i+0d 0maxrss 0+2pf 0+144csw
>
>Lot of system time, but that could be lots of things.  What does "ping"
>latency look like?

About 2ms.  Still a bit high.  Note that receive (the above is transmit)
runs at about 28Mb/s.

-- 
Matt Thomas               Internet:   matt@3am-software.com
3am Software Foundry      WWW URL:    http://www.3am-software.com/bio/matt/
Nashua, NH                Disclaimer: I disavow all knowledge of this message