Date: Sat, 17 Jul 1999 16:20:39 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Vincent Poy <vince@venus.GAIANET.NET> Cc: sthaug@nethelp.no, tim@storm.digital-rain.com, freebsd-hackers@FreeBSD.ORG Subject: Re: poor ethernet performance? Message-ID: <199907172320.QAA81716@apollo.backplane.com> References: <Pine.BSF.4.05.9907171554280.331-100000@venus.GAIANET.NET>
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: Hmmm, how did you do the measurement and how big of a file does it
:need?
:
: With a 122MByte file, it only does 2644Kbytes/sec. This is
:between two Pentium II 450 machines with Intel Pro100+ NICs.
:
:
:Cheers,
:Vince - vince@MCESTATE.COM - vince@GAIANET.NET ________ __ ____
2.6 MB/sec is what I would expect if you were running the test
over an ssh link on a fast cpu - the encryption eats a lot of cpu. But
a normal rcp or ftp or data transfer can easily do 9-10 MBytes/sec.
test3:/root# /usr/bin/rsh apollo -n "dd if=/images/swap/swap.209.157.86.6 bs=16k" > /dev/null
8192+0 records in
8192+0 records out
134217728 bytes transferred in 13.558270 secs (9899326 bytes/sec)
test3:/root# /usr/bin/rsh apollo -n "dd if=/images/swap/swap.209.157.86.6 bs=16k" > /dev/null
8192+0 records in
8192+0 records out
134217728 bytes transferred in 13.530817 secs (9919410 bytes/sec)
This is over 100BaseTX, *HALF* duplex running through a hub. 9.9 MBytes/sec.
(using 1 MByte = 1000 * 1000).
But if I use ssh instead, which I do only so I remember to turn off
the shell service in my inetd.conf that I just turned on a moment ago,
I am limited by apollo's poor PPro-200 and get:
test3:/root# ssh apollo -n "dd if=/images/swap/swap.209.157.86.6 bs=16k" > /dev/null
8192+0 records in
8192+0 records out
134217728 bytes transferred in 96.545217 secs (1390206 bytes/sec)
test3:/root#
-Matt
Matthew Dillon
<dillon@backplane.com>
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