Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!sgi!vjs@rhyolite.wpd.sgi.com
From: vjs@rhyolite.wpd.sgi.com (Vernon Schryver)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: source code of ttcp.c
Summary: slightly changed version in sgi.com:sgi/src/ttcp.shar
Keywords: ttcp.c
Message-ID: <41252@sgi.sgi.com>
Date: 1 Sep 89 02:52:16 GMT
References: <1515@mimir.dmt.oz>
Sender: vjs@rhyolite.wpd.sgi.com
Organization: Silicon Graphics, Inc., Mountain View, CA
Lines: 14

It has been observed that page misalignment substantially affects the TCP &
UDP performance of some systems.  Given common bcopy/copy{in,out}/usercopy
implementations, one would expect dramatic effects from byte-misaligment.
So there is now a version of ttcp which allows the base of the buffers to
be known and controlled in sgi/src/ttcp.shar via public ftp to sgi.com.
The shar file also contains a man-page (hacked at SGI, so all errors are
ours).  It has been submitted to comp.sources.unix.

Anyone care to say publically how many vendors are near or past 1MByte/sec?


Vernon Schryver
Silicon Graphics
vjs@sgi.com