*BSD News Article 73542


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From: gillhaa@ghost.whirlpool.com (Andrew Gillham)
Newsgroups: comp.os.linux.networking,comp.unix.bsd.netbsd.misc,comp.unix.bsd.freebsd.misc
Subject: Re: TCP latency
Date: 13 Jul 1996 00:04:20 -0400
Organization: Whirlpool Corporation
Lines: 43
Message-ID: <4s7784$t9c@ghost.whirlpool.com>
References: <4paedl$4bm@engnews2.Eng.Sun.COM> <4rvmtf$ven@linux.cs.Helsinki.FI> <31E3D9E2.41C67EA6@dyson.iquest.net> <4s5bl2$qpg@linux.cs.helsinki.fi>
NNTP-Posting-Host: ghost.whirlpool.com
Xref: euryale.cc.adfa.oz.au comp.os.linux.networking:45025 comp.unix.bsd.netbsd.misc:4011 comp.unix.bsd.freebsd.misc:23406


Ok, since you guys _insist_ on crossposting to netbsd... :)

In article <4s5bl2$qpg@linux.cs.helsinki.fi>,
Linus Torvalds <torvalds@linux.cs.Helsinki.FI> wrote:
>In article <31E3D9E2.41C67EA6@dyson.iquest.net>,
>
>Ooohh.. "FreeBSD is faster over loopback, when compared to Linux over
>the wire". Film at 11.
>
>	linux$ ./lat_tcp linux
>	$Id: lat_tcp.c,v 1.2 1995/03/11 02:25:31 lm Exp $
>	TCP latency using linux: 181 microseconds

shadow# ./lat_tcp shadow
$Id: lat_tcp.c,v 1.1 1994/11/18 08:49:48 lm Exp $
TCP latency using shadow: 164 microseconds

>And if you don't like latency numbers, what are your throughput numbers?
>(Btw, check your bcopy() speed first to see if the hardware really _is_
>comparable, see below)
>
>	linux$ ./bw_tcp linux 50m 
>	$Id: bw_tcp.c,v 1.3 1995/06/21 21:02:49 lm Exp $
>	Socket bandwidth using linux: 17.14 MB/sec

shadow# ./bw_tcp shadow 50m
$Id: bw_tcp.c,v 1.1 1994/11/18 08:49:48 lm Exp $
Socket bandwidth using shadow: 39.25 MB/sec

shadow# uname -srm
NetBSD 1.2_BETA i386

-Andrew

PS.  Since the *original* flamebait didn't list the hardware,
     I'll not list mine either. :)

-- 
-----------------------------------------------------------------
Andrew Gillham
gillham@whirlpool.com           Click here: http://www.NetBSD.org
I speak for myself, not for my employer.