From: Andi Kleen <andi@firstfloor.org>
To: Linux Kernel <linux-kernel@vger.kernel.org>, svaidy@linux.vnet.ibm.com
Cc: 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>,
Balbir Singh <balbir@linux.vnet.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 15:49:01 +0200 [thread overview]
Message-ID: <87k5gcqpbm.fsf@basil.nowhere.org> (raw)
In-Reply-To: <20080625191100.GI21892@dirshya.in.ibm.com> (Vaidyanathan Srinivasan's message of "Thu, 26 Jun 2008 00:41:00 +0530")
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> writes:
>
> The idea being proposed is to enhance the tunable with varied degrees
> of consolidation that can work best for different workload
> characteristics. echo 2 > /sys/.../sched_mc_power_savings could
> enable more aggressive consolidation than the default.
It would be better to fix the single power saving default to work
better with bursty workloads too than to add more tunables. Tunables
are basically "we give up, let's push the problem to the user"
which is not nice. I suspect a lot of users won't even know if their
workloads are bursty or not. Or they might have workloads which
are both bursty and not bursty.
Or did you try that and failed?
-Andi
next prev parent reply other threads:[~2008-06-26 13:56 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 [this message]
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
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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