Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753324AbZKFHiC (ORCPT ); Fri, 6 Nov 2009 02:38:02 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752941AbZKFHiB (ORCPT ); Fri, 6 Nov 2009 02:38:01 -0500 Received: from mga07.intel.com ([143.182.124.22]:40367 "EHLO azsmga101.ch.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752887AbZKFHiB (ORCPT ); Fri, 6 Nov 2009 02:38:01 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.44,691,1249282800"; d="scan'208";a="208374289" Subject: specjbb2005 and aim7 regression with 2.6.32-rc kernels From: "Zhang, Yanmin" To: LKML , Ingo Molnar , Peter Zijlstra Cc: Mike Galbraith Content-Type: text/plain Date: Fri, 06 Nov 2009 15:38:50 +0800 Message-Id: <1257493130.16282.109.camel@ymzhang> Mime-Version: 1.0 X-Mailer: Evolution 2.22.1 (2.22.1-2.fc9) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 895 Lines: 20 Comparing with 2.6.31, specjbb2005 and aim7 have some regressions with 2.6.32-rc kernels on core2 machines. 1) On 4*4 core tigerton: specjbb2005 has about 5% regression. 2) On 2*4 stoakley: aim7 has about 5% regression. On Nehalem, specjbb2005 has about 2%~8% improvement instead of regression. aim7 has much dependency on schedule patameters, such like sched_latency_ns, sched_min_granularity_ns, and sched_wakeup_granularity_ns. 2.6.32-rc kernel decreases these parameter values. I restore them and retest aim7 on stoakley. aim7 regression becomes about 2% and specjbb2005 regression also becomes 2%. But on Nehalem, the improvement shrinks. -- 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/