Re: Network slowdown due to CFS

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To: Martin Michlmayr <tbm@...>

Cc: Srivatsa Vaddagiri <vatsa@...>, <linux-kernel@...>

Subject: Re: Network slowdown due to CFS

Date: Wednesday, September 26, 2007 - 5:47 am

* Ingo Molnar <mingo@elte.hu> wrote:

quoted text> > What kind of information can I supply so you can track this down?
> 
> as a starter, could you boot the sched-devel.git kernel, with 
> CONFIG_SCHED_DEBUG=y and CONFIG_SCHEDSTATS=y enabled and could you run 
> this script while the iperf test is in the middle of its testrun:
> 
>   http://people.redhat.com/mingo/cfs-scheduler/tools/cfs-debug-info.sh
> 
> this will gather a good deal of info about the workload in question. 
> Please send me the resulting debug file.

Another thing: please also do the same with the vanilla v2.6.22 kernel, 
and send me that file too. (so that the two cases can be compared)

	Ingo
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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:
Tarkan Erimer	Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
Greg KH	[GIT PATCH] driver core patches against 2.6.24
Michal Piotrowski	Re: Linux 2.6.21-rc4
Joe Peterson	Re: 2.6.25.3: su gets stuck for root
git:

linux-netdev:
Jarek Poplawski	[PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().
David Miller	[GIT]: Networking
Gerrit Renker	[PATCH 15/37] dccp: Set per-connection CCIDs via socket options
Emil S Tantilov	Re: WARNING: at include/net/sock.h:417 udp_lib_unhash
openbsd-misc:

Re: Network slowdown due to CFS

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