Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756144AbYF0IGv (ORCPT ); Fri, 27 Jun 2008 04:06:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753610AbYF0IGf (ORCPT ); Fri, 27 Jun 2008 04:06:35 -0400 Received: from one.firstfloor.org ([213.235.205.2]:48113 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752673AbYF0IGa (ORCPT ); Fri, 27 Jun 2008 04:06:30 -0400 Message-ID: <48649F84.4090501@firstfloor.org> Date: Fri, 27 Jun 2008 10:06:28 +0200 From: Andi Kleen User-Agent: Thunderbird 1.5.0.12 (X11/20060911) MIME-Version: 1.0 To: Peter Zijlstra CC: dipankar@in.ibm.com, balbir@linux.vnet.ibm.com, Linux Kernel , Suresh B Siddha , Venkatesh Pallipadi , Ingo Molnar , Vatsa , Gautham R Shenoy Subject: Re: [RFC v1] Tunable sched_mc_power_savings=n References: <20080625191100.GI21892@dirshya.in.ibm.com> <87k5gcqpbm.fsf@basil.nowhere.org> <4863AF57.3040005@linux.vnet.ibm.com> <4863DB29.1020304@firstfloor.org> <20080626185254.GA12416@dirshya.in.ibm.com> <4863F93C.9040102@firstfloor.org> <20080626210025.GB26167@in.ibm.com> <48640C04.9020600@firstfloor.org> <1214516584.12265.10.camel@twins.programming.kicks-ass.net> <48641A7D.6080204@firstfloor.org> <1214553090.2801.7.camel@twins.programming.kicks-ass.net> In-Reply-To: <1214553090.2801.7.camel@twins.programming.kicks-ass.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1136 Lines: 32 Peter Zijlstra wrote: > There used to be an option for them to also up on niced load. If that You could always force socket power saving mode to off globally too if you don't want it at all. > disappeared then I'd call that a huge usability regression. Basically > making ondemand useless. > > /me checks,.. > > Yeah, on F9, my opteron runs at 1GHz when idle, but when I start distcc, > which like said runs on nice 19, the cpu speed goes up to 2.4GHz. Ok distcc is a special case, but it doesn't apply to a lot of other processes (do you really want your CPU to crank up for "updatedb" or beagle or some backup job for example?) Perhaps there should be a way to express this in priorities? "I am low priority, but want to be work conserving if the system is idle" The group scheduler is changing the semantics of nice completely anyways, so so more changes could be applied. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/