Re: Network slowdown due to CFS

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To: Ingo Molnar <mingo@...>

Cc: Mike Galbraith <efault@...>, Srivatsa Vaddagiri <vatsa@...>, <linux-kernel@...>, Stephen Hemminger <shemminger@...>

Subject: Re: Network slowdown due to CFS

Date: Thursday, September 27, 2007 - 7:12 am

* Ingo Molnar <mingo@elte.hu> [2007-09-27 12:56]:
quoted text> i'm curious by how much does CPU go down, and what's the output of
> iperf? (does it saturate full 100mbit network bandwidth)

I get about 94-95 Mbits/sec and CPU drops from 99% to about 82% (this
is with a 600 MHz ARM CPU).
-- 
Martin Michlmayr
http://www.cyrius.com/
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Messages in current thread:

Network slowdown due to CFS, Martin Michlmayr, (Wed Sep 26, 4:52 am)

Re: Network slowdown due to CFS, Mike Galbraith, (Wed Sep 26, 6:23 am)

Re: Network slowdown due to CFS, Martin Michlmayr, (Wed Sep 26, 6:48 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 7:21 am)

Re: Network slowdown due to CFS, Martin Michlmayr, (Wed Sep 26, 7:29 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Thu Sep 27, 5:49 am)

Re: Network slowdown due to CFS, Martin Michlmayr, (Thu Sep 27, 6:54 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Thu Sep 27, 6:56 am)

Re: Network slowdown due to CFS, Martin Michlmayr, (Thu Sep 27, 7:12 am)

RE: Network slowdown due to CFS, David Schwartz, (Wed Sep 26, 8:00 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 9:31 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Thu Sep 27, 5:30 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Thu Sep 27, 5:46 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Thu Sep 27, 8:27 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Thu Sep 27, 9:31 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Thu Sep 27, 10:42 am)

Re: Network slowdown due to CFS, Nick Piggin, (Fri Sep 28, 2:10 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Mon Oct 1, 4:43 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Tue Oct 2, 5:26 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 12:25 pm)

Re: Network slowdown due to CFS, Jarek Poplawski, (Tue Oct 2, 5:03 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Tue Oct 2, 9:39 am)

Re: Network slowdown due to CFS, Chris Friesen, (Mon Oct 1, 12:55 pm)

Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 1:09 pm)

Re: Network slowdown due to CFS, Chris Friesen, (Mon Oct 1, 1:45 pm)

Re: iperf yield usage, Ingo Molnar, (Mon Oct 1, 3:09 pm)

RE: Network slowdown due to CFS, David Schwartz, (Mon Oct 1, 12:49 pm)

RE: Network slowdown due to CFS, Rusty Russell, (Wed Oct 3, 8:31 pm)

Re: Network slowdown due to CFS, Helge Hafting, (Wed Oct 3, 7:31 am)

Re: Network slowdown due to CFS, Arjan van de Ven, (Mon Oct 1, 3:53 pm)

RE: Network slowdown due to CFS, David Schwartz, (Mon Oct 1, 6:17 pm)

Re: Network slowdown due to CFS, Arjan van de Ven, (Mon Oct 1, 6:35 pm)

RE: Network slowdown due to CFS, David Schwartz, (Mon Oct 1, 6:44 pm)

Re: Network slowdown due to CFS, Arjan van de Ven, (Mon Oct 1, 6:55 pm)

RE: Network slowdown due to CFS, David Schwartz, (Tue Oct 2, 11:37 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 3:15 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Mon Oct 1, 1:31 pm)

RE: Network slowdown due to CFS, David Schwartz, (Mon Oct 1, 2:23 pm)

Re: yield API, Ingo Molnar, (Tue Oct 2, 2:46 am)

Re: yield API, Jesper Juhl, (Wed Dec 12, 6:39 pm)

Re: yield API, Kyle Moffett, (Thu Dec 13, 12:43 am)

RE: yield API, David Schwartz, (Thu Dec 13, 4:10 pm)

Re: yield API, Eric St-Laurent, (Tue Oct 2, 5:57 pm)

Re: yield API, linux-os (Dick Johnson), (Tue Oct 2, 7:50 am)

Re: yield API, Douglas McNaught, (Tue Oct 2, 11:24 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Tue Oct 2, 2:26 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Tue Oct 2, 2:08 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Tue Oct 2, 2:06 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 4:02 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Wed Oct 3, 4:16 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 4:56 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Wed Oct 3, 5:10 am)

Re: Network slowdown due to CFS, Casey Dahlin, (Thu Oct 4, 1:33 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 5:50 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Sun Oct 7, 3:18 am)

Re: Network slowdown due to CFS, Dmitry Adamushko, (Wed Oct 3, 6:55 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 7:40 am)

Re: yield, Ingo Molnar, (Wed Oct 3, 7:56 am)

Re: yield, Jarek Poplawski, (Wed Oct 3, 8:16 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Wed Oct 3, 7:22 am)

Re: Network slowdown due to CFS, Dmitry Adamushko, (Wed Oct 3, 6:58 am)

Re: Network slowdown due to CFS, Jarek Poplawski, (Wed Oct 3, 7:20 am)

Re: Network slowdown due to CFS, Andi Kleen, (Tue Oct 2, 2:47 am)

Re: Network slowdown due to CFS, Stephen Hemminger, (Wed Sep 26, 11:46 am)

Re: Network slowdown due to CFS, Stephen Hemminger, (Wed Sep 26, 11:40 am)

Re: Network slowdown due to CFS, Mike Galbraith, (Wed Sep 26, 6:20 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 5:34 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 5:47 am)

Re: Network slowdown due to CFS, Martin Michlmayr, (Wed Sep 26, 6:08 am)

Re: Network slowdown due to CFS, Ingo Molnar, (Wed Sep 26, 6:18 am)


linux-kernel:
Andy Whitcroft	clam
Tarkan Erimer	Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
Greg Kroah-Hartman	[PATCH 001/196] Chinese: Add the known_regression URI to the HOWTO
David Miller	Re: Slow DOWN, please!!!
git:

linux-netdev:
Arjan van de Ven	Re: [GIT]: Networking
Lennert Buytenhek	[PATCH 08/39] mv643xx_eth: nuke port status register bit defines
Jarek Poplawski	Re: HTB accuracy for high speed
Jarek Poplawski	[PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().
openbsd-misc:

Re: Network slowdown due to CFS

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