From: Arjan van de Ven <arjan@infradead.org>
To: linux-kernel@vger.kernel.org
Cc: mingo@elte.hu, davej@redhat.com
Subject: [PATCH v2 0/8] Fix performance issue with ondemand governor
Date: Sun, 9 May 2010 08:21:26 -0700 [thread overview]
Message-ID: <20100509082126.4a080d46@infradead.org> (raw)
[Version 2 includes the acks/etc. Andrew: no changes from the
patches that are in -mm]
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...
--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
next reply other threads:[~2010-05-09 15:24 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-09 15:21 Arjan van de Ven [this message]
2010-05-09 15:22 ` [PATCH v2 1/8] sched: Add a comment to get_cpu_idle_time_us() Arjan van de Ven
2010-05-10 5:52 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2010-05-09 15:22 ` [PATCH v2 2/8] sched: Introduce a function to update the idle statistics Arjan van de Ven
2010-05-10 5:52 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2010-05-09 15:23 ` [PATCH v2 3/8] sched: Update the idle statistics in get_cpu_idle_time_us() Arjan van de Ven
2010-05-10 5:53 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2010-05-09 15:24 ` [PATCH v2 4/8] sched: Fold updating of the last_update_time_info into update_ts_time_stats() Arjan van de Ven
2010-05-10 5:53 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2010-05-09 15:24 ` [PATCH v2 5/8] sched: Eliminate the ts->idle_lastupdate field Arjan van de Ven
2010-05-10 5:53 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2010-05-09 15:25 ` [PATCH v2 6/8] sched: Intoduce get_cpu_iowait_time_us() Arjan van de Ven
2010-05-10 5:54 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2010-05-09 15:26 ` [PATCH v2 7/8] ondemand: Solve a big performance issue by counting IOWAIT time as busy Arjan van de Ven
2010-05-10 5:54 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2010-05-09 15:26 ` [PATCH v2 8/8] ondemand: Make the iowait-is-busy time a sysfs tunable Arjan van de Ven
2010-05-10 5:54 ` [tip:sched/core] " tip-bot for Arjan van de Ven
2010-05-09 17:49 ` [PATCH v2 0/8] Fix performance issue with ondemand governor Ingo Molnar
2010-05-24 20:44 ` Rik van Riel
2010-05-28 9:30 ` Ingo Molnar
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