Beginner Questions

[Eric Norum]

On Wednesday, November 27, 2002, at 11:42  AM, Joel Sherrill wrote:
>
> I would also add that it appears to have very good performance.  Eric
> and I have seen very high throughput given the modest horsepower of
> the Bobcat.  That machine is approximately a 133/486 with only i386
> instructions.  Do you remember the exact ttcp numbers Eric?  I was
> thinking they were 70-80% of 100baseT theoretical limits.

Here are the numbers Joel sent me.  They're pretty close to what I saw 
on my Bobcat, too.  Network benchmarks are difficult for me to run here 
since the campus is a fully-bridged network of around 12,000 machines 
which means *lots* of broadcast traffic.

> bash-2.05$ ./ttcp -r -s
> ttcp-r: buflen=8192, nbuf=2048, align=16384/0, port=5001  tcp
> ttcp-r: socket
> ttcp-r: accept from 192.168.1.200
> ttcp-r: 16777216 bytes in 2.61 real seconds = 6288.75 KB/sec +++
> ttcp-r: 11450 I/O calls, msec/call = 0.23, calls/sec = 4394.91
> ttcp-r: 0.0user 0.0sys 0:02real 3% 0i+0d 0maxrss 0+2pf 0+0csw
>
> bash-2.05$ ./ttcp -t -s 192.168.1.200
> ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001  tcp  ->
> 192.168.1.200
> ttcp-t: socket
> ttcp-t: connect
> ttcp-t: 16777216 bytes in 2.14 real seconds = 7639.31 KB/sec +++
> ttcp-t: 2048 I/O calls, msec/call = 1.07, calls/sec = 954.91
> ttcp-t: 0.0user 0.0sys 0:02real 0% 0i+0d 0maxrss 0+2pf 0+0csw
-- 
Eric Norum <eric.norum at usask.ca>
Department of Electrical Engineering
University of Saskatchewan
Saskatoon, Canada.
Phone: (306) 966-5394   FAX:   (306) 966-5407