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---------- Forwarded message ----------
From: Blu3Viper <david@kalifornia.com>
Date: Wed, 15 Apr 1998 02:22:59 -0700 (PDT)
To: "David S. Miller" <davem@dm.cobaltmicro.com>
Subject: re: TCP very slow with 2.1.x
Cc: linux-kernel@vger.rutgers.edu
Ok. here is my next batch of tests regarding the strange tcp latency.
info:
more 207.213.15.250, AMD K6-200, 128M
james 207.213.0.47/207.213.15.129, AMD K6-233, 192M
yoda 207.213.15.200, P200, 64M
wmail 207.213.0.9, PPro200, 96M
. = 100baseT
| = 10baseT
(2.0.30)
[wmail]
. \- 207.213.0.9
.
4500 100 . 100
[cisco]......<switches>......<switches>
|
10 |
<hub>
|
| /- 207.213.0.47
(2.0.33) [james]
| \- 207.213.15.129
|
10 |
<hub>
/ \
/ \
| |
207.213.15.250 -\ | | /- 207.213.15.200
[more] [yoda]
(2.1.96) (2.0.30)
Test 1: more <-> yoda, get/put of 418259 bytes.
tcpdump A: run on more, filename more-my.dmp
tcpdump -fnSvp src or dst 207.213.15.250 and not port 22
tcpdump B: run on yoda, filename yoda-my.dmp
tcpdump -fnSvp src or dst 207.213.15.250 and not port 22
tcpdump C: run on james, filename james-my.dmp
tcpdump -fnSv src or dst 207.213.15.250 and not port 22 -i eth1
Test 2: more <-> james, get/put of 418259 bytes.
tcpdump A: more-mj.dmp
tcpdump B: james-mj.dmp
Test 3: more <-> wmail, get/put of 418259 bytes.
tcpdump A: more-mm.dmp
tcpdump B: james-mm.dmp
tcpdump C: wmail-mm.dmp
also included is a snip from my syslog showing some framing errors on the
207.213.15.129 ethernet card. none of these systems are loaded and all are
pentium 150 or higher with >64M of ram. between the 2.0.x systems i
normally achieve 800K-1M/s average ftp transfer depending on network load.
do note, these tests are considerably faster than two weeks back with
2.1.93 and lower. i will put 2.1.96 on my other machines at home and
repeat this test there tomorrow.
-d
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