Subject: Re: bus_dma'ed DEFTA driver committed.
To: Matt Thomas <firstname.lastname@example.org>
From: Jason Thorpe <email@example.com>
Date: 05/26/1998 20:46:21
On Tue, 26 May 1998 21:19:10 -0400
Matt Thomas <firstname.lastname@example.org> wrote:
> >Please try it with the lastest version of pmax/bus_dma.c (1.2).
> After fixing the latest version, ping times are getting reasonable.
Yah, sorry about that :-)
> 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?
> Slow compared to my alphas but sure the Ethernet its on. Tomorrow
> I get to see if I can boot and run diskless over fddi.
How does this device do under Ultrix or OSF/1 (if you have any DECstations
running OSF/1, that is :-)
In any case, please don't try this on an R4000 until I get a chance to beat
on the other parts :-)
Jason R. Thorpe email@example.com
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