Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754249Ab1FCK66 (ORCPT ); Fri, 3 Jun 2011 06:58:58 -0400 Received: from casper.infradead.org ([85.118.1.10]:41963 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751834Ab1FCK64 convert rfc822-to-8bit (ORCPT ); Fri, 3 Jun 2011 06:58:56 -0400 Subject: Re: [tip:sched/urgent] sched: Fix cross-cpu clock sync on remote wakeups From: Peter Zijlstra To: Milton Miller Cc: Yong Zhang , Borislav Petkov , Borislav Petkov , "mingo@redhat.com" , "hpa@zytor.com" , "linux-kernel@vger.kernel.org" , "markus@trippelsdorf.de" , "tglx@linutronix.de" , "mingo@elte.hu" , "linux-tip-commits@vger.kernel.org" In-Reply-To: <1307098506.2353.3094.camel@twins> References: <1307029711.2497.717.camel@laptop> <1306835745.2353.3.camel@twins> <20110531125621.GA24439@gere.osrc.amd.com> <1306847516.2353.80.camel@twins> <20110601070547.GB3368@liondog.tnic> <1306924612.2353.176.camel@twins> <20110601155017.GD24028@aftab> <1307019866.2497.675.camel@laptop> <20110602142340.GA3356@zhy> <1307097360.2353.3071.camel@twins> <1307098506.2353.3094.camel@twins> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Date: Fri, 03 Jun 2011 12:58:33 +0200 Message-ID: <1307098713.2353.3099.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 737 Lines: 21 On Fri, 2011-06-03 at 12:55 +0200, Peter Zijlstra wrote: > On Fri, 2011-06-03 at 12:36 +0200, Peter Zijlstra wrote: > > > Can we get some numbers for how often the two cases occur on some > > > various workloads? > > > > Sure, let me stick some counters in. > > Of 128765 IPIs, 17483 were with an empty list (boot + make -j64). > > I didn't yet look at where those empty ones originated from. After two more make clean; make -j64 cycles thats: 250082:24793 So on this load its 10+:1. -- 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/