Re: Network slowdown due to CFS

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
From: Mike Galbraith
Date: Wednesday, September 26, 2007 - 3:20 am

On Wed, 2007-09-26 at 10:52 +0200, Martin Michlmayr wrote:

FWIW, on my box blasting localhost, I see the opposite, repeatably.

root@Homer: iperf -v
iperf version 2.0.2 (03 May 2005) pthreads

2.6.22.1-smp
for i in `seq 1 3`; do iperf -c localhost; done >> /xx

------------------------------------------------------------
Client connecting to localhost, TCP port 5001
TCP window size: 49.2 KByte (default)
------------------------------------------------------------
[  3] local 127.0.0.1 port 21383 connected with 127.0.0.1 port 5001
[  3]  0.0-10.1 sec    518 MBytes    432 Mbits/sec
------------------------------------------------------------
Client connecting to localhost, TCP port 5001
TCP window size: 49.2 KByte (default)
------------------------------------------------------------
[  3] local 127.0.0.1 port 21384 connected with 127.0.0.1 port 5001
[  3]  0.0-10.0 sec    325 MBytes    273 Mbits/sec
------------------------------------------------------------
Client connecting to localhost, TCP port 5001
TCP window size: 49.2 KByte (default)
------------------------------------------------------------
[  3] local 127.0.0.1 port 21385 connected with 127.0.0.1 port 5001
[  3]  0.0-10.0 sec    434 MBytes    363 Mbits/sec

2.6.23-rc8-smp-d
for i in `seq 1 3`; do iperf -c localhost; done >> /xx

------------------------------------------------------------
Client connecting to localhost, TCP port 5001
TCP window size: 49.2 KByte (default)
------------------------------------------------------------
[  3] local 127.0.0.1 port 11650 connected with 127.0.0.1 port 5001
[  3]  0.0-10.0 sec  2.01 GBytes  1.72 Gbits/sec
------------------------------------------------------------
Client connecting to localhost, TCP port 5001
TCP window size: 49.2 KByte (default)
------------------------------------------------------------
[  3] local 127.0.0.1 port 11651 connected with 127.0.0.1 port 5001
[  3]  0.0-10.0 sec  2.02 GBytes  1.74 Gbits/sec
------------------------------------------------------------
Client connecting to localhost, TCP port 5001
TCP window size: 49.2 KByte (default)
------------------------------------------------------------
[  3] local 127.0.0.1 port 11652 connected with 127.0.0.1 port 5001
[  3]  0.0-10.0 sec  2.10 GBytes  1.81 Gbits/sec


-
Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:
Network slowdown due to CFS, Martin Michlmayr, (Wed Sep 26, 1:52 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 2:34 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 2:47 am)
Re: Network slowdown due to CFS, Martin Michlmayr, (Wed Sep 26, 3:08 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 3:18 am)
Re: Network slowdown due to CFS, Mike Galbraith, (Wed Sep 26, 3:20 am)
Re: Network slowdown due to CFS, Mike Galbraith, (Wed Sep 26, 3:23 am)
Re: Network slowdown due to CFS, Martin Michlmayr, (Wed Sep 26, 3:48 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 4:21 am)
Re: Network slowdown due to CFS, Martin Michlmayr, (Wed Sep 26, 4:29 am)
RE: Network slowdown due to CFS, David Schwartz, (Wed Sep 26, 5:00 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 6:31 am)
Re: Network slowdown due to CFS, Stephen Hemminger, (Wed Sep 26, 8:40 am)
Re: Network slowdown due to CFS, Stephen Hemminger, (Wed Sep 26, 8:46 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Thu Sep 27, 2:30 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Thu Sep 27, 2:46 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Thu Sep 27, 2:49 am)
Re: Network slowdown due to CFS, Martin Michlmayr, (Thu Sep 27, 3:54 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Thu Sep 27, 3:56 am)
Re: Network slowdown due to CFS, Martin Michlmayr, (Thu Sep 27, 4:12 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Thu Sep 27, 5:27 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Thu Sep 27, 6:31 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Thu Sep 27, 7:42 am)
Re: Network slowdown due to CFS, Nick Piggin, (Thu Sep 27, 11:10 pm)
Re: Network slowdown due to CFS, Jarek Poplawski, (Mon Oct 1, 1:43 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 9:25 am)
RE: Network slowdown due to CFS, David Schwartz, (Mon Oct 1, 9:49 am)
Re: Network slowdown due to CFS, Chris Friesen, (Mon Oct 1, 9:55 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 10:09 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 10:31 am)
Re: Network slowdown due to CFS, Chris Friesen, (Mon Oct 1, 10:45 am)
RE: Network slowdown due to CFS, David Schwartz, (Mon Oct 1, 11:23 am)
Re: iperf yield usage, Ingo Molnar, (Mon Oct 1, 12:09 pm)
Re: Network slowdown due to CFS, Arjan van de Ven, (Mon Oct 1, 12:53 pm)
RE: Network slowdown due to CFS, David Schwartz, (Mon Oct 1, 3:17 pm)
Re: Network slowdown due to CFS, Arjan van de Ven, (Mon Oct 1, 3:35 pm)
RE: Network slowdown due to CFS, David Schwartz, (Mon Oct 1, 3:44 pm)
Re: Network slowdown due to CFS, Arjan van de Ven, (Mon Oct 1, 3:55 pm)
Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 11:06 pm)
Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 11:08 pm)
Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 11:26 pm)
Re: yield API, Ingo Molnar, (Mon Oct 1, 11:46 pm)
Re: Network slowdown due to CFS, Andi Kleen, (Mon Oct 1, 11:47 pm)
Re: Network slowdown due to CFS, Jarek Poplawski, (Tue Oct 2, 2:03 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Tue Oct 2, 2:26 am)
Re: yield API, linux-os (Dick Johnson), (Tue Oct 2, 4:50 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Tue Oct 2, 6:39 am)
Re: yield API, Douglas McNaught, (Tue Oct 2, 8:24 am)
RE: Network slowdown due to CFS, David Schwartz, (Tue Oct 2, 8:37 am)
Re: yield API, Eric St-Laurent, (Tue Oct 2, 2:57 pm)
Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 12:15 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 1:02 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Wed Oct 3, 1:16 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 1:56 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Wed Oct 3, 2:10 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 2:50 am)
Re: Network slowdown due to CFS, Dmitry Adamushko, (Wed Oct 3, 3:55 am)
Re: Network slowdown due to CFS, Dmitry Adamushko, (Wed Oct 3, 3:58 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 4:20 am)
Re: Network slowdown due to CFS, Ingo Molnar, (Wed Oct 3, 4:22 am)
Re: Network slowdown due to CFS, Helge Hafting, (Wed Oct 3, 4:31 am)
Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 4:40 am)
Re: yield, Ingo Molnar, (Wed Oct 3, 4:56 am)
Re: yield, Jarek Poplawski, (Wed Oct 3, 5:16 am)
RE: Network slowdown due to CFS, Rusty Russell, (Wed Oct 3, 5:31 pm)
Re: Network slowdown due to CFS, Casey Dahlin, (Wed Oct 3, 10:33 pm)
Re: Network slowdown due to CFS, Ingo Molnar, (Sun Oct 7, 12:18 am)
Re: yield API, Kyle Moffett, (Wed Dec 12, 9:43 pm)
RE: yield API, David Schwartz, (Thu Dec 13, 1:10 pm)