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echo: nthelp
to: Frank Haber
from: Gregg N
date: 2005-05-17 15:15:54
subject: Re: Crappy Windows 2000/XP UDP performance

From: "Gregg N" 

Frank Haber wrote:
> Below find a 100Base run to my SOHO router, on verdammte SP2, which I
> hear throttles you after yea so many outbound UDPs.
>
> [C:\DOWNLOAD]iperf -u -l 1024 -c 192.168.1.1 -i 1 -b 100m -w 256k
> ------------------------------------------------------------
> Client connecting to 192.168.1.1, UDP port 5001
> Sending 1024 byte datagrams
> UDP buffer size:  256 KByte
> ------------------------------------------------------------
> [1916] local 192.168.1.105 port 1151 connected with 192.168.1.1 port
> 5001 [ ID] Interval       Transfer     Bandwidth
> [1916]  0.0- 1.0 sec  10.9 MBytes  91.7 Mbits/sec
> [1916]  1.0- 2.0 sec  10.9 MBytes  91.7 Mbits/sec
> [1916]  2.0- 3.0 sec  10.7 MBytes  90.1 Mbits/sec
> [1916]  3.0- 4.0 sec  10.9 MBytes  91.7 Mbits/sec
> [1916]  4.0- 5.0 sec  10.9 MBytes  91.7 Mbits/sec
> [1916]  5.0- 6.0 sec  10.7 MBytes  90.1 Mbits/sec
> [1916]  6.0- 7.0 sec  10.9 MBytes  91.7 Mbits/sec
> [1916]  7.0- 8.0 sec  10.9 MBytes  91.7 Mbits/sec
> [1916]  8.0- 9.0 sec  10.7 MBytes  90.1 Mbits/sec
> [1916]  9.0-10.0 sec  10.9 MBytes  91.7 Mbits/sec
> [1916]  0.0-10.0 sec   109 MBytes  91.1 Mbits/sec
> read failed: Connection reset by peer

With 1024 byte-datagrams, the performance is normal. What does it give you
with 1025-byte datagrams (-l 1025)?

Gregg

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