From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932489AbWFUIeE (ORCPT ); Wed, 21 Jun 2006 04:34:04 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932492AbWFUIeE (ORCPT ); Wed, 21 Jun 2006 04:34:04 -0400 Received: from ns.firmix.at ([62.141.48.66]:19883 "EHLO ns.firmix.at") by vger.kernel.org with ESMTP id S932489AbWFUIeC (ORCPT ); Wed, 21 Jun 2006 04:34:02 -0400 Subject: Re: kernel-x64-smp-multiprocessor-time util problem From: Bernd Petrovitsch To: art@usfltd.com Cc: linux-kernel@vger.kernel.org In-Reply-To: <20060621031742.7tlid5zm4kgg4488@69.222.0.225> References: <20060619180413.qlgd1oj9etmosckg@69.222.0.225> <1150759021.3043.33.camel@gimli.at.home> <20060621031742.7tlid5zm4kgg4488@69.222.0.225> Content-Type: text/plain Organization: Firmix Software GmbH Date: Wed, 21 Jun 2006 10:33:52 +0200 Message-Id: <1150878832.16346.2.camel@tara.firmix.at> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 (2.2.3-4.fc4) Content-Transfer-Encoding: 7bit X-Spam-Score: -2.35 () AWL,BAYES_00,FORGED_RCVD_HELO Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2006-06-21 at 03:17 -0500, art@usfltd.com wrote: > Quoting Bernd Petrovitsch : > > On Mon, 2006-06-19 at 18:04 -0500, art@usfltd.com wrote: > >> on dual core amd-athlon under 64bit-smp core > >> > >> kernel compilation time: > >> > >> time make -j 8 > >> ... > >> LD [M] sound/usb/snd-usb-lib.ko > >> LD [M] sound/usb/usx2y/snd-usb-usx2y.ko > >> > >> real 18m0.948s > >> user 26m6.270s ------bad > >> sys 4m22.256s ------?bad > >> [xxx@localhost linux-2.6.17]$ > >> --- real-clock time is ~18 min -- user and system time doubled? > > > > How many virtual CPUs (i.e. HT is "2 CPUs") do you have in that machine? [...] > 1 CPU 2 cores = 2 (amd athlon x2 4200+) What does "real" really measure? What does "user" and "sys" really measure? Bernd -- Firmix Software GmbH http://www.firmix.at/ mobil: +43 664 4416156 fax: +43 1 7890849-55 Embedded Linux Development and Services