Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758800AbZD0WS4 (ORCPT ); Mon, 27 Apr 2009 18:18:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754899AbZD0WSr (ORCPT ); Mon, 27 Apr 2009 18:18:47 -0400 Received: from one.firstfloor.org ([213.235.205.2]:40649 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754059AbZD0WSq (ORCPT ); Mon, 27 Apr 2009 18:18:46 -0400 Date: Tue, 28 Apr 2009 00:22:42 +0200 From: Andi Kleen To: "Styner, Douglas W" Cc: Andi Kleen , "linux-kernel@vger.kernel.org" , "oprofile-list@lists.sf.net" , "Ma, Chinang" , "willy@linux.intel.com" Subject: Re: Discrepancies between Oprofile and vmstat II Message-ID: <20090427222242.GJ27382@one.firstfloor.org> References: <87ljpmk29b.fsf@basil.nowhere.org> <20090427185305.GG27382@one.firstfloor.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 899 Lines: 23 On Mon, Apr 27, 2009 at 03:15:27PM -0700, Styner, Douglas W wrote: > > > I believe so, but will confirm. > > > > > opcontrol -e=CPU_CLK_UNHALTED:80000 -e=LLC_MISSES:6000 > > > > > > Using another profiling tool to confirm, we see 74.784% user, 25.174% > > kernel. > > > > Just verifying -- you also see it when you use a shorter period than 80000 > right? > > Confirmed. Changes in profile appear to be due to increased sampling by oprofile with lower value. You mean "with higher value", right ? It's still strange that it suddenly changed in 2.6.27 though. There shouldn't have been a difference there. So I still think it's a regression. -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/