Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759560AbYFXLiK (ORCPT ); Tue, 24 Jun 2008 07:38:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751617AbYFXLh5 (ORCPT ); Tue, 24 Jun 2008 07:37:57 -0400 Received: from mx3.mail.elte.hu ([157.181.1.138]:50609 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750841AbYFXLh4 (ORCPT ); Tue, 24 Jun 2008 07:37:56 -0400 Date: Tue, 24 Jun 2008 13:37:10 +0200 From: Ingo Molnar To: "Paul E. McKenney" Cc: Arjan van de Ven , linux-kernel@vger.kernel.org, josh@freedesktop.org, dvhltc@us.ibm.com, niv@us.ibm.com, dino@in.ibm.com, akpm@linux-foundation.org, torvalds@linux-foundation.org, vegard.nossum@gmail.com, adobriyan@gmail.com, oleg@tv-sign.ru, bunk@kernel.org, rjw@sisk.pl Subject: Re: [PATCH -tip-rcu] Make rcutorture more vicious: make quiescent rcutorture less power-hungry Message-ID: <20080624113710.GB21890@elte.hu> References: <20080618122144.GA27143@linux.vnet.ibm.com> <20080618162649.GA18326@linux.vnet.ibm.com> <20080622200638.GA25328@linux.vnet.ibm.com> <20080622131712.54ba732c@infradead.org> <20080622210255.GF22569@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080622210255.GF22569@linux.vnet.ibm.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 839 Lines: 23 * Paul E. McKenney wrote: > > could you also make it use round_jiffies_relative() to make the > > power impact even less..... (by coalescing various "once a second" > > timers like this) > > Good point!!! As follows, on top of the previous one. > > This patch aligns the rcutorture wakeup times to align with all other > multiple-of-a-second wakeups to further decrease power consumption. > > Suggested-by: Arjan van de Ven > Signed-off-by: Paul E. McKenney applied to tip/core/rcu - thanks Paul. Ingo -- 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/