From: Andi Kleen <andi@firstfloor.org>
To: balbir@linux.vnet.ibm.com
Cc: Linux Kernel <linux-kernel@vger.kernel.org>,
svaidy@linux.vnet.ibm.com,
Suresh B Siddha <suresh.b.siddha@intel.com>,
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Dipankar Sarma <dipankar@in.ibm.com>,
Vatsa <vatsa@linux.vnet.ibm.com>,
Gautham R Shenoy <ego@in.ibm.com>
Subject: Re: [RFC v1] Tunable sched_mc_power_savings=n
Date: Thu, 26 Jun 2008 20:08:41 +0200 [thread overview]
Message-ID: <4863DB29.1020304@firstfloor.org> (raw)
In-Reply-To: <4863AF57.3040005@linux.vnet.ibm.com>
> A user could be an application and certain applications can predict their
> workload.
So you expect the applications to run suid root and change a sysctl?
And what happens when two applications run that do that and they have differing
requirements? Will they fight over the sysctl?
> For example, a database, a file indexer, etc can predict their workload.
A file indexer should run with a high nice level and low priority would ideally always
prefer power saving. But it doesn't currently. Perhaps it should?
>
> Policies are best known in user land and the best controlled from there.
> Consider a case where the end user might select a performance based policy or a
> policy to aggressively save power (during peak tariff times). With
How many users are going to do that? Seems like a unrealistic case to me.
-Andi
next prev parent reply other threads:[~2008-06-26 18:09 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-25 19:11 [RFC v1] Tunable sched_mc_power_savings=n Vaidyanathan Srinivasan
2008-06-26 13:49 ` Andi Kleen
2008-06-26 15:01 ` Dipankar Sarma
2008-06-26 18:31 ` Vaidyanathan Srinivasan
2008-06-26 15:01 ` Balbir Singh
2008-06-26 18:08 ` Andi Kleen [this message]
2008-06-26 18:52 ` Vaidyanathan Srinivasan
2008-06-26 19:37 ` David Collier-Brown
2008-06-27 6:50 ` Vaidyanathan Srinivasan
2008-06-26 20:17 ` Andi Kleen
2008-06-26 21:00 ` Dipankar Sarma
2008-06-26 21:37 ` Andi Kleen
2008-06-26 21:43 ` Peter Zijlstra
2008-06-26 22:38 ` Andi Kleen
2008-06-27 6:24 ` Vaidyanathan Srinivasan
2008-06-27 7:51 ` Peter Zijlstra
2008-06-27 8:06 ` Andi Kleen
2008-06-28 11:35 ` Tim Connors
2008-06-28 11:55 ` Andi Kleen
2008-06-28 12:22 ` Matthew Garrett
2008-06-28 12:36 ` Andi Kleen
2008-06-28 12:53 ` Matthew Garrett
2008-06-28 11:22 ` Tim Connors
2008-06-29 18:02 ` David Collier-Brown
2008-06-30 4:57 ` Vaidyanathan Srinivasan
2008-06-30 5:55 ` Tim Connors
2008-06-30 14:18 ` David Collier-Brown
2008-06-30 14:31 ` Andi Kleen
2008-06-27 4:54 ` Dipankar Sarma
2008-06-27 8:03 ` Andi Kleen
2008-06-30 16:10 ` Dipankar Sarma
2008-06-27 7:19 ` Vaidyanathan Srinivasan
2008-06-27 4:15 ` Balbir Singh
2008-06-27 8:08 ` KOSAKI Motohiro
2008-06-27 8:50 ` Vaidyanathan Srinivasan
2008-06-27 12:54 ` David Collier-Brown
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