From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933180AbWFXCH6 (ORCPT ); Fri, 23 Jun 2006 22:07:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933182AbWFXCH6 (ORCPT ); Fri, 23 Jun 2006 22:07:58 -0400 Received: from mail.gmx.de ([213.165.64.21]:7625 "HELO mail.gmx.net") by vger.kernel.org with SMTP id S933180AbWFXCH5 (ORCPT ); Fri, 23 Jun 2006 22:07:57 -0400 X-Authenticated: #5039886 Date: Sat, 24 Jun 2006 04:07:56 +0200 From: =?iso-8859-1?Q?Bj=F6rn?= Steinbrink To: Danial Thom Cc: linux-kernel@vger.kernel.org Subject: Re: Measuring tools - top and interrupts Message-ID: <20060624020755.GA6139@atjola.homenet> Mail-Followup-To: =?iso-8859-1?Q?Bj=F6rn?= Steinbrink , Danial Thom , linux-kernel@vger.kernel.org References: <20060622162141.GC14682@harddisk-recovery.com> <20060622165808.71704.qmail@web33303.mail.mud.yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20060622165808.71704.qmail@web33303.mail.mud.yahoo.com> User-Agent: Mutt/1.5.11+cvs20060403 X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 2006.06.22 09:58:08 -0700, Danial Thom wrote: > And 75K pps may not be "much", but its still at > least 10% of what the system can handle, so it > should measure around a 10% load. 2.4 measures > about 12% load. So the only conclusion is that > load accounting is broken in 2.6. Are you by chance using procps < 3.1.12? The kernel reports absolute values for cpu usage, the conversion to percentage is done by top/vmstat itself. And those old versions don't know about the new fields that 2.6 kernels have in /proc/stat, thus they simply ignore the si and hi values, producing quite misleading results... Björn PS: procps 3.1.12 was released in 2003, so if DEC was stone age and my assumption about your tools holds, then your tools are like... medieval :)