strange Iperf results
>Reply-To: <yxia --at-- caltech.edu>
>From: "Yang Xia" <yxia --at-- caltech.edu>
>To: <iperf-users --at-- dast.nlanr.net>
>Subject: strange Iperf results
>Date: Mon, 7 Jun 2004 23:49:07 -0700
>
>Hi,
>
>On a dual Xeon machine running RHAS3 and 2.6.6 kernel I'm getting some weird
>output from Iperf-2.0.b. I don't know why Iperf isn't printing an error
>message for this case. If stracing might help I have included some Iperf
>strace snippets when I ran it. Can you please help with on how to improve
>this situation?
>
>Thanks
>Yang
>
>
>[root --at-- w10cit root]# iperf -c 127.0.0.1 -w 10m -i 1 -t 5
>------------------------------------------------------------
>Client connecting to 127.0.0.1, TCP port 5001
>TCP window size: 256 KByte (WARNING: requested 10.0 MByte)
>------------------------------------------------------------
>[ 3] local 127.0.0.1 port 32775 connected with 127.0.0.1 port 5001
>[ 3] 0.0--1086673593.3 sec 0.00 Bytes -0.00 bits/sec
>[ 3] -1086673593.3--1086673592.3 sec 0.00 Bytes 0.00 bits/sec
>[ 3] -1086673592.3--1086673591.3 sec 0.00 Bytes 0.00 bits/sec
>[ 3] -1086673591.3--1086673590.3 sec 0.00 Bytes 0.00 bits/sec
>[ 3] -1086673590.3--1086673589.3 sec 0.00 Bytes 0.00 bits/sec
>....(cancelled)
>
>[root --at-- w10cit root]# iperf -s -w 10m -i1
>------------------------------------------------------------
>Server listening on TCP port 5001
>TCP window size: 256 KByte (WARNING: requested 10.0 MByte)
>------------------------------------------------------------
>[ 4] local 127.0.0.1 port 5001 connected with 127.0.0.1 port 32772
>[ 4] 0.0--1086673315.7 sec 0.00 Bytes -0.00 bits/sec
>[ 4] -1086673315.7--1086673314.7 sec 0.00 Bytes 0.00 bits/sec
>[ 4] -1086673314.7--1086673313.7 sec 0.00 Bytes 0.00 bits/sec
>[ 4] -1086673313.7--1086673312.7 sec 0.00 Bytes 0.00 bits/sec
>[ 4] -1086673312.7--1086673311.7 sec 0.00 Bytes 0.00 bits/sec
>....(cancelled)
>
>iperf strace:
>=============
>gettimeofday({1086673315, 670526}, NULL) = 0
>write(1, "[ 3] local 127.0.0.1 port 32772"..., 68[ 3] local 127.0.0.1 port
>32772 connected with 127.0.0.1 port 5001
>) = 68
>gettimeofday({1086673315, 670659}, NULL) = 0
>gettimeofday({1086673315, 670697}, NULL) = 0
>write(3, "\0\0\0\0\0\0\0\1\0\0\23\211\0\0\0\0\0P\0\0\377\377\374"..., 8192)
>= 8192
>write(1, "[ 3] 0.0--1086673315.7 sec 0."..., 57[ 3] 0.0--1086673315.7
>sec 0.00 Bytes -0.00 bits/sec
>) = 57
>write(1, "[ 3] -1086673315.7--1086673314."..., 65[ 3]
>-1086673315.7--1086673314.7 sec 0.00 Bytes 0.00 bits/sec
>) = 65
>write(1, "[ 3] -1086673314.7--1086673313."..., 65[ 3]
>-1086673314.7--1086673313.7 sec 0.00 Bytes 0.00 bits/sec
>) = 65
>write(1, "[ 3] -1086673313.7--1086673312."..., 65[ 3]
>-1086673313.7--1086673312.7 sec 0.00 Bytes 0.00 bits/sec
>) = 65
>write(1, "[ 3] -1086673312.7--1086673311."..., 65[ 3]
>-1086673312.7--1086673311.7 sec 0.00 Bytes 0.00 bits/sec
>) = 65
>
>
>
>
>
--
Mitch Kutzko | mitch --at-- dast.nlanr.net | mitch --at-- ncsa.uiuc.edu | 217-333-1199
http://hobbes.ncsa.uiuc.edu/