Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965370AbYCSWev (ORCPT ); Wed, 19 Mar 2008 18:34:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933385AbYCSVGd (ORCPT ); Wed, 19 Mar 2008 17:06:33 -0400 Received: from fallback.mail.elte.hu ([157.181.151.13]:55956 "EHLO fallback.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756999AbYCSVGc (ORCPT ); Wed, 19 Mar 2008 17:06:32 -0400 Date: Wed, 19 Mar 2008 14:48:13 +0100 From: Ingo Molnar To: "Zhang, Yanmin" Cc: Peter Zijlstra , linux-kernel@vger.kernel.org Subject: VolanoMark performance improvements (was: Re: volanoMark 12% regression with 2.6.25-rc6) Message-ID: <20080319134813.GA25197@elte.hu> References: <1205831650.3215.569.camel@ymzhang> <20080318195807.GA26887@elte.hu> <1205892420.3215.594.camel@ymzhang> <20080319021555.GA15825@elte.hu> <1205896722.3215.624.camel@ymzhang> <20080319032854.GA20793@elte.hu> <1205901807.3215.659.camel@ymzhang> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1205901807.3215.659.camel@ymzhang> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0004] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2223 Lines: 56 i just tried a handful of kernels with VolanoMark on an Intel quad-core testbox, using java-1.6.0-openjdk-1.6.0.0-0.4.b06.fc9. The result: v2.6.25 is the fastest ever Linux kernel in VolanoMark testing, -rc7-to-be is ~41% faster than v2.6.24.2, and ~59% faster than v2.6.21, in this Java benchmark: v2.6.25-rc7-to-be: Average throughput = 145613 messages per second Average throughput = 142569 messages per second Average throughput = 144963 messages per second Average throughput = 144998 messages per second Average throughput = 144213 messages per second Average throughput = 144491 messages per second v2.6.24.2: Average throughput = 101351 messages per second Average throughput = 99247 messages per second Average throughput = 101155 messages per second Average throughput = 103905 messages per second Average throughput = 98345 messages per second Average throughput = 102775 messages per second v2.6.21: Average throughput = 87630 messages per second Average throughput = 91366 messages per second Average throughput = 91317 messages per second Average throughput = 91317 messages per second Average throughput = 91359 messages per second Average throughput = 92116 messages per second these numbers are totally reproducible when running them over a long time, i only included 6 runs for brevity. (A sidenote: the /proc/sys/kernel/compat_sched_yield switch of 0 or 1 has no effect on the .25-rc7 results, and it degraded the .24 results by about 35% so i kept it off there.) so i can see no 12% regression at all - but i have not tried all the zillions of older, binary-only Java distributions. So, to make the tests comparable, and to make some progress on this matter, could you please try java-1.6.0-openjdk - what kind of VolanoMark numbers do you get with it? If you still see a regression with an open Java package too then could you please send me the .config of your test-kernel? Thanks, Ingo -- 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/