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Re: [PATCH 0/7] Fix performance issue with ondemand governor

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From: Dave Jones
Subject: Re: [PATCH 0/7] Fix performance issue with ondemand governor
Date: Monday, April 26, 2010 - 2:41 pm

On Sun, Apr 18, 2010 at 11:59:49AM -0700, Arjan van de Ven wrote:
 > There have been various reports of the ondemand governor causing some
 > serious performance issues, one of the latest ones from Andrew.
 > There are several fundamental issues with ondemand (being worked on),
 > but the report from Andrew can be fixed relatively easily.
 > 
 > The fundamental issue is that ondemand will go to a (too) low CPU
 > frequency for workloads that alternatingly disk and CPU bound...

given the scheduler changes, these probably make more sense to go
via one of Ingo's trees ?
If everyone agrees, feel free to add my Signed-off-by:

	Dave

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Messages in current thread:
[PATCH 0/7] Fix performance issue with ondemand governor, Arjan van de Ven, (Sun Apr 18, 11:59 am)
[PATCH 1/7] sched: add a comment to get_cpu_idle_time_us(), Arjan van de Ven, (Sun Apr 18, 12:00 pm)
[PATCH 2/7] sched: introduce a function to update the idle ..., Arjan van de Ven, (Sun Apr 18, 12:01 pm)
[PATCH 3/7] sched: update the idle statistics in get_cpu_i ..., Arjan van de Ven, (Sun Apr 18, 12:01 pm)
[PATCH 4/7] sched: fold updating of the last update time i ..., Arjan van de Ven, (Sun Apr 18, 12:02 pm)
[PATCH 5/7] sched: eliminate the ts->idle_lastupdate field, Arjan van de Ven, (Sun Apr 18, 12:02 pm)
[PATCH 6/7] sched: introduce get_cpu_iowait_time_us(), Arjan van de Ven, (Sun Apr 18, 12:03 pm)
[PATCH 7/7] ondemand: Solve the big performance issue with ..., Arjan van de Ven, (Sun Apr 18, 12:03 pm)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Éric Piel, (Mon Apr 19, 1:29 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Tvrtko Ursulin, (Mon Apr 19, 2:09 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Mon Apr 19, 6:43 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Mon Apr 19, 6:46 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Éric Piel, (Mon Apr 19, 7:30 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Mon Apr 19, 7:47 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Tvrtko Ursulin, (Mon Apr 19, 8:29 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Mon Apr 19, 5:47 pm)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Tvrtko Ursulin, (Tue Apr 20, 2:10 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Thomas Renninger, (Tue Apr 20, 2:24 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Thomas Renninger, (Tue Apr 20, 2:29 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Tue Apr 20, 4:02 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Tue Apr 20, 4:07 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Pavel Machek, (Thu Apr 22, 10:24 pm)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Pavel Machek, (Thu Apr 22, 10:26 pm)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Willy Tarreau, (Thu Apr 22, 10:38 pm)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Pavel Machek, (Fri Apr 23, 1:38 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Thomas Renninger, (Fri Apr 23, 1:50 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Fri Apr 23, 6:52 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Fri Apr 23, 7:10 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Willy Tarreau, (Fri Apr 23, 8:35 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Fri Apr 23, 9:06 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Fri Apr 23, 9:08 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Pavel Machek, (Fri Apr 23, 9:56 pm)
Re: [PATCH 1/7] sched: add a comment to get_cpu_idle_time_us(), Rik van Riel, (Mon Apr 26, 12:25 pm)
Re: [PATCH 2/7] sched: introduce a function to update the ..., Rik van Riel, (Mon Apr 26, 1:11 pm)
Re: [PATCH 3/7] sched: update the idle statistics in get_c ..., Rik van Riel, (Mon Apr 26, 1:36 pm)
Re: [PATCH 4/7] sched: fold updating of the last update ti ..., Rik van Riel, (Mon Apr 26, 1:58 pm)
Re: [PATCH 5/7] sched: eliminate the ts->idle_lastupdate field, Rik van Riel, (Mon Apr 26, 2:00 pm)
Re: [PATCH 6/7] sched: introduce get_cpu_iowait_time_us(), Rik van Riel, (Mon Apr 26, 2:05 pm)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Rik van Riel, (Mon Apr 26, 2:30 pm)
Re: [PATCH 0/7] Fix performance issue with ondemand governor, Dave Jones, (Mon Apr 26, 2:41 pm)
Re: [PATCH 0/7] Fix performance issue with ondemand governor, Dominik Brodowski, (Mon Apr 26, 2:45 pm)
Re: [PATCH 0/7] Fix performance issue with ondemand governor, Rik van Riel, (Mon Apr 26, 2:59 pm)
Re: [PATCH 0/7] Fix performance issue with ondemand governor, Dominik Brodowski, (Mon Apr 26, 3:05 pm)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Mike Chan, (Mon Apr 26, 5:29 pm)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Thomas Renninger, (Tue Apr 27, 4:39 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Pavel Machek, (Tue Apr 27, 6:01 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Mike Chan, (Tue Apr 27, 11:10 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Tvrtko Ursulin, (Wed Apr 28, 1:57 am)
Re: [PATCH 7/7] ondemand: Solve the big performance issue ..., Arjan van de Ven, (Sat May 1, 4:29 pm)
[PATCH 8/7] cpufreq: make the iowait-is-busy-time a sysfs ..., Arjan van de Ven, (Mon May 3, 8:48 pm)
Re: [PATCH 8/7] cpufreq: make the iowait-is-busy-time a sy ..., Willy Tarreau, (Mon May 3, 9:16 pm)
Re: [PATCH 8/7] cpufreq: make the iowait-is-busy-time a sy ..., Pavel Machek, (Mon May 3, 10:43 pm)
Re: [PATCH 8/7] cpufreq: make the iowait-is-busy-time a sy ..., Rik van Riel, (Tue May 4, 6:51 am)