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[Xen-users] losing network packets on heavy load, xen 3.0.3
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| Subject: | [Xen-users] losing network packets on heavy load, xen 3.0.3 |
| From: | "Luis Vinay" <luisvinay@xxxxxxxxx> |
| Date: | Fri, 24 Nov 2006 13:09:08 -0300 |
| Delivery-date: | Fri, 24 Nov 2006 08:09:26 -0800 |
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I have made this test many times with similar results all times: Two virtual machines, both with Debian 3.1 r3, the firs is running "iperf -s -d" and the second runs in a infite loop "iperf -c [ip addr of machine 1] -t 60 -N -P 10 -d" whit this creates 10(+10) parallel bidirectional connections for 60 seconds on the server side I get this: vm-debian-B:~# iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused [ 4] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39537 write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 write2 failed: Broken pipe TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 6] local 0.0.0.0 port 46381 connected with 10.0.41.129 port 5001 [ 6] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 9] local 0.0.0.0 port 46383 connected with 10.0.41.129 port 5001 [ 9] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ 13] local 10.0.41.131 port 46387 connected with 10.0.41.129 port 5001 [ 12] local 10.0.41.131 port 46386 connected with 10.0.41.129 port 5001 [ 14] local 10.0.41.131 port 46388 connected with 10.0.41.129 port 5001 [ 10] local 10.0.41.131 port 46384 connected with 10.0.41.129 port 5001 [ 16] local 10.0.41.131 port 46390 connected with 10.0.41.129 port 5001 [ 11] local 10.0.41.131 port 46385 connected with 10.0.41.129 port 5001 [ 8] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39538 ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 7] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39539 connect failed: Connection refused ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused [ 32] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39540 connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 35] local 0.0.0.0 port 46411 connected with 10.0.41.129 port 5001 [ 35] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 39] local 0.0.0.0 port 46415 connected with 10.0.41.129 port 5001 [ 39] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec write2 failed: Broken pipe [ 41] local 0.0.0.0 port 46417 connected with 10.0.41.129 port 5001 write2 failed: Broken pipe [ 41] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ 40] local 0.0.0.0 port 46416 connected with 10.0.41.129 port 5001 [ 40] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec write2 failed: Broken pipe [ 44] local 0.0.0.0 port 46419 connected with 10.0.41.129 port 5001 [ 44] 0.0- 0.1 sec 0.00 Bytes 0.00 bits/sec connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe write2 failed: Broken pipe [ 43] local 0.0.0.0 port 46418 connected with 10.0.41.129 port 5001 [ 43] 0.0- 0.2 sec 0.00 Bytes 0.00 bits/sec [ 34] local 0.0.0.0 port 46410 connected with 10.0.41.129 port 5001 [ 34] 0.0 - 0.2 sec 0.00 Bytes 0.00 bits/sec [SUM] 0.0- 0.2 sec 0.00 Bytes 0.00 bits/sec connect failed: Connection refused [ 42] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39541 connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe connect failed: Connection refused write2 failed: Broken pipe [ 30] local 0.0.0.0 port 46407 connected with 10.0.41.129 port 5001 [ 30] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ 31] local 0.0.0.0 port 46408 connected with 10.0.41.129 port 5001 [ 31] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ 22] local 10.0.41.131 port 46399 connected with 10.0.41.129 port 5001 write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Connection reset by peer write2 failed: Broken pipe write2 failed: Broken pipe [ 23] local 0.0.0.0 port 46400 connected with 10.0.41.129 port 5001 [ 23] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 27] local 0.0.0.0 port 46404 connected with 10.0.41.129 port 5001 [ 27] 0.0 - 0.0 sec 0.00 Bytes 0.00 bits/sec write2 failed: Broken pipe write2 failed: Connection reset by peer write2 failed: Connection reset by peer write2 failed: Connection reset by peer write2 failed: Broken pipe [ 28] local 0.0.0.0 port 46405 connected with 10.0.41.129 port 5001 [ 28] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 19] local 10.0.41.131 port 46396 connected with 10.0.41.129 port 5001 [ 51] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39542 connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 47] local 0.0.0.0 port 46422 connected with 10.0.41.129 port 5001 [ 47] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 48] local 0.0.0.0 port 46423 connected with 10.0.41.129 port 5001 [ 48] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe [ 37] local 0.0.0.0 port 46428 connected with 10.0.41.129 port 5001 [ 37] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 35] local 0.0.0.0 port 46426 connected with 10.0.41.129 port 5001 [ 35] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [SUM] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ 18] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39543 [ 33] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39544 [ 50] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39546 [ 61] local 10.0.41.131 port 5001 connected with 10.0.41.129 port 39545 connect failed: Connection refused connect failed: Connection refused write2 failed: Connection reset by peer connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused [ 22] 0.0- 0.1 sec 11.3 KBytes 1.40 Mbits/sec [SUM] 0.0- 0.1 sec 11.3 KBytes 1.40 Mbits/sec write2 failed: Connection reset by peer [ 19] 0.0- 1.2 sec 11.3 KBytes 78.0 Kbits/sec connect failed: Connection refused ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 54] local 0.0.0.0 port 46459 connected with 10.0.41.129 port 5001 [ 54] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 53] local 0.0.0.0 port 46458 connected with 10.0.41.129 port 5001 [ 53] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [SUM] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 65] local 0.0.0.0 port 46469 connected with 10.0.41.129 port 5001 [ 65] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 64] local 0.0.0.0 port 46468 connected with 10.0.41.129 port 5001 [ 64] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [SUM] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 75] local 0.0.0.0 port 46479 connected with 10.0.41.129 port 5001 [ 75] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 67] local 0.0.0.0 port 46471 connected with 10.0.41.129 port 5001 [ 67] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [SUM] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe [ 68] local 0.0.0.0 port 46472 connected with 10.0.41.129 port 5001 [ 68] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 74] local 0.0.0.0 port 46478 connected with 10.0.41.129 port 5001 [ 74] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused ------------------------------------------------------------ Client connecting to 10.0.41.129, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe connect failed: Connection refused connect failed: Connection refused connect failed: Connection refused write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe [ 17] local 0.0.0.0 port 46438 connected with 10.0.41.129 port 5001 [ 17] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [SUM] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe write2 failed: Broken pipe [ 40] local 0.0.0.0 port 46432 connected with 10.0.41.129 port 5001 [ 40] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec [ ... ] [ 23] local 0.0.0.0 port 46437 connected with 10.0.41.129 port 5001 [ 23] 0.0- 0.0 sec 0.00 Bytes 0.00 bits/sec write2 failed: Broken pipe write2 failed: Broken pipe [ 20] local 0.0.0.0 port 46439 connected with 10.0.41.129 port 5001 [ ... ] [ 5] 0.0-57.9 sec 11.1 MBytes 1.61 Mbits/sec the client side shows this: Debian31r1-vm1:~# iperf -c 10.0.41.131 -t 60 -N -P 10 -d ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ ------------------------------------------------------------ Client connecting to 10.0.41.131, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 4] local 10.0.41.129 port 39538 connected with 10.0.41.131 port 5001 [ 6] local 10.0.41.129 port 39540 connected with 10.0.41.131 port 5001 [ 8] local 10.0.41.129 port 39542 connected with 10.0.41.131 port 5001 [ 7] local 10.0.41.129 port 39541 connected with 10.0.41.131 port 5001 [ 9] local 10.0.41.129 port 39543 connected with 10.0.41.131 port 5001 [ 10] local 10.0.41.129 port 39544 connected with 10.0.41.131 port 5001 [ 3] local 10.0.41.129 port 39537 connected with 10.0.41.131 port 5001 [ 13] local 10.0.41.129 port 39546 connected with 10.0.41.131 port 5001 [ 5] local 10.0.41.129 port 39539 connected with 10.0.41.131 port 5001 [ 14] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46384 [ 15] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46385 [ 16] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46386 [ 17] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46387 [ 18] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46388 [ 19] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46389 [ 11] local 10.0.41.129 port 39545 connected with 10.0.41.131 port 5001 [ 20] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46391 [ 22] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46392 [ 23] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46393 [ 21] local 10.0.41.129 port 5001 connected with 10.0.41.131 port 46390 [ 4] 0.0-60.0 sec 11.6 MBytes 1.62 Mbits/sec [ 7] 0.0-60.0 sec 11.8 MBytes 1.65 Mbits/sec [ 6] 0.0-60.0 sec 12.2 MBytes 1.71 Mbits/sec [ 14] 0.0-60.0 sec 18.1 MBytes 2.53 Mbits/sec [ 16] 0.0-60.0 sec 14.1 MBytes 1.97 Mbits/sec [ 18] 0.0-60.0 sec 14.3 MBytes 2.00 Mbits/sec [ 19] 0.0-60.0 sec 12.5 MBytes 1.75 Mbits/sec [ 21] 0.0-60.0 sec 13.2 MBytes 1.85 Mbits/sec [ 15] 0.0-60.0 sec 14.4 MBytes 2.01 Mbits/sec [ 13] 0.0-60.3 sec 10.1 MBytes 1.40 Mbits/sec [ 9] 0.0-60.3 sec 8.66 MBytes 1.20 Mbits/sec [ 17] 0.0-60.2 sec 12.2 MBytes 1.71 Mbits/sec [ 8] 0.0-60.5 sec 4.96 MBytes 688 Kbits/sec [ 11] 0.0-60.5 sec 11.0 MBytes 1.53 Mbits/sec [ 23] 0.0-60.6 sec 17.6 MBytes 2.44 Mbits/sec [ 5] 0.0-60.7 sec 12.8 MBytes 1.77 Mbits/sec [ 22] 0.0-60.6 sec 14.0 MBytes 1.93 Mbits/sec [ 3] 0.0-60.7 sec 12.8 MBytes 1.77 Mbits/sec [ 10] 0.0-61.1 sec 9.49 MBytes 1.30 Mbits/sec [SUM] 0.0-61.1 sec 105 MBytes 14.5 Mbits/sec [ 20] 0.0-61.7 sec 11.1 MBytes 1.52 Mbits/sec [SUM] 0.0-61.7 sec 142 MBytes 19.3 Mbits/sec As we can see there is a lot of connection errors and the speed measurement reveals a very poor performance Test platform detail: Dom0 Dell PE1950, 4 Xeon @1.6G, 8Gig memory RedHat Enterprise Server 4 update 4 Xen 3.0.3, kernel 2.6.16.29 Virtual Machines 1 CPU, 300Mb memory Debian 3.1r3 Kernel 2.6.8-3-386 Both machines are on the same Dom0 and the use bridged networking Any ideas or comments? _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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