Hi, Sun Managers:
Thanks Jeff Kays jkays@msc.edu
Mike Wagner mike_wagner@il.us.swissbank.com
Roland Kaltefleiter kaltef@theo-physik.uni-kiel.d400.de
The summary of my question is showed as follows ::
>
> In Sun workstation, TCP/IP is implemented in its kerenl. I have
> two questions about TCP/IP.
> 1. Is there any system prarmeters which change will impact TCP/IP
> performace ? ( Of cource, after changing these parameters, we must
> make a new kernel version to test it. )
>
There are a few parameters. Most of the are found in /sys/netinet/in_proto.h.
One of the most valuable variables is the tcp_sendspace and tcp_recvspace
variables, which set the buffer, or window, sizes. For protocols like FDDI
and ATM you want these larger than the default 4KBytes. I have mine set
to 24KBytes.
> 2. Is there any benchmark to testing TCP/IP or UDP/IP related
> performance ?
>
A good TCP tester is ttcp, which can be found with archie. It is good
because it reads/writes data from/to memory, so you don't have issues
like disk speed to worry about.
Yen_Wen Chen
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