From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753519AbXDKSP1 (ORCPT ); Wed, 11 Apr 2007 14:15:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753521AbXDKSP1 (ORCPT ); Wed, 11 Apr 2007 14:15:27 -0400 Received: from smtp.osdl.org ([65.172.181.24]:55093 "EHLO smtp.osdl.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753519AbXDKSP0 (ORCPT ); Wed, 11 Apr 2007 14:15:26 -0400 Date: Wed, 11 Apr 2007 11:06:59 -0700 From: Andrew Morton To: Andi Kleen Cc: eranian@hpl.hp.com, Venki Pallipadi , Adam Belay , "Rafael J. Wysocki" , linux-kernel@vger.kernel.org, randy.dunlap@oracle.com, lenb@kernel.org Subject: Re: 2.6.21-rc6-mm1 Message-Id: <20070411110659.d6ab6b39.akpm@linux-foundation.org> In-Reply-To: <200704111239.06259.ak@suse.de> References: <653FFBB4508B9042B5D43DC9E18836F539ADFB@scsmsx415.amr.corp.intel.com> <20070411001513.GA2975@linux-os.sc.intel.com> <20070411052007.GA24056@frankl.hpl.hp.com> <200704111239.06259.ak@suse.de> X-Mailer: Sylpheed version 2.2.7 (GTK+ 2.8.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 11 Apr 2007 12:39:05 +0200 Andi Kleen wrote: > > The next kernel patch for Perfmon will not make use of the idle notification > > anymore on any platform. > > What do you use instead? > > I've been actually thinking to add idle notifier support to oprofile to correct > for the "perfctr doesn't tick in idle" issue which makes numbers not add up to 100%. > A lot of people are currently running idle=poll to work around this and that is very > wasteful. There was some plan to be able to switch idle handlers at runtime, so one can select idle=poll just during oprofile operation. I'm not sure what happened to that idea.