Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 12 Dec 2000 13:49:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 12 Dec 2000 13:49:30 -0500 Received: from tstac.esa.lanl.gov ([128.165.46.3]:60434 "EHLO tstac.esa.lanl.gov") by vger.kernel.org with ESMTP id ; Tue, 12 Dec 2000 13:49:12 -0500 From: Steven Cole Reply-To: scole@lanl.gov Date: Tue, 12 Dec 2000 11:18:26 -0700 X-Mailer: KMail [version 1.1.99] Content-Type: text/plain; charset="us-ascii" Cc: linux-kernel@vger.kernel.org, torvalds@transmeta.com To: Alan Cox In-Reply-To: In-Reply-To: Subject: Re: UP 2.2.18 makes kernels 3% faster than UP 2.4.0-test12 MIME-Version: 1.0 Message-Id: <00121211182600.11576@spc.esa.lanl.gov> Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Monday 11 December 2000 11:46, Alan Cox wrote: > > Its an interesting demo that 2.4 has some performance problems since 2.2 > is slower than 2.0 although nowdays not much. Results for SMP 2.2.18 vs SMP 2.4.0-test12 are in. I repeated my earlier tests on a much faster dual P-III machine. Executive summary: SMP 2.4.0 is 2% faster than SMP 2.2.18. Although I made the following changes in the test procedure, these tests for 2.2.18 and 2.4.0-test12 were held under identical conditions. I used make -j3 bzImage for these tests on this SMP machine. The test machine is a dual P-III (733 Mhz), 256MB, IDE. I ran X and KDE 2.0 during the tests to provide a greater though reproducable load on the tested kernel. The 2.2.18 kernel used was the final 2.2.18. The 2.4.0-test12 is still 2.4.0-test12-pre7 since test12(final) does not yet build with reiserfs. Team Reiser is working on this. Here are the numbers I got. Again, three runs each were done. Task: make -j3 bzImage for 2.4.0-test12-pre7 kernel tree. Numbers are seconds to build. 1 2 3 ave. 143 143 143 143 Running 2.2.18 SMP 140 140 140 140 Running 2.4.0-test12-pre7 SMP The numbers are very repeatable, as you can see. This time, 2.4.0-test12 wins by 2%. Recounts can be performed by anyone, anytime. Steven - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/