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Re: yield

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To: Jarek Poplawski <jarkao2@...>
Cc: Dmitry Adamushko <dmitry.adamushko@...>, David Schwartz <davids@...>, <linux-kernel@...>
Subject: Re: yield
Date: Wednesday, October 3, 2007 - 7:56 am

* Jarek Poplawski <jarkao2@o2.pl> wrote:


My current take on this: queue the current task right to the next 
position in the tree (this is what this patch achieves in essence) was 
one of the yield implementations we already tried in CFS but it didnt 
meet the expectations of some apps. So i can only repeat my argument: 
this is not something that can be "solved" in the way you imagine and 
your arguments just reiterate the path that CFS has already taken in the 
past. So please do not expect _us_ to go out and pester people. If 
people feel so inclined, they are of course welcome to test out various 
approaches. (they might as well try the original yield-granularity patch 
which also makes the amount of "delay" tunable, so the ideal amount of 
delay can be figured out. And of course they should also try the 
existing yield flag.)

	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)
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