Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753227AbYCRJQQ (ORCPT ); Tue, 18 Mar 2008 05:16:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751530AbYCRJQF (ORCPT ); Tue, 18 Mar 2008 05:16:05 -0400 Received: from mga09.intel.com ([134.134.136.24]:47749 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751941AbYCRJQE (ORCPT ); Tue, 18 Mar 2008 05:16:04 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.25,517,1199692800"; d="scan'208";a="307193727" Subject: volanoMark 12% regression with 2.6.25-rc6 From: "Zhang, Yanmin" To: Ingo Molnar , Peter Zijlstra Cc: LKML Content-Type: text/plain; charset=utf-8 Date: Tue, 18 Mar 2008 17:14:10 +0800 Message-Id: <1205831650.3215.569.camel@ymzhang> Mime-Version: 1.0 X-Mailer: Evolution 2.9.2 (2.9.2-2.fc7) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1064 Lines: 33 Comparing with 2.6.25-rc5, volanoMark has 12% regression with 2.6.25-rc6 on my 8-core stoakley. Bisect tracked it down to: e22ecef1d2658ba54ed7d3fdb5d60829fb434c23 is first bad commit commit e22ecef1d2658ba54ed7d3fdb5d60829fb434c23 Author: Ingo Molnar Date: Fri Mar 14 22:16:08 2008 +0100 sched: fix fair sleepers Fair sleepers need to scale their latency target down by runqueue weight. Otherwise busy systems will gain ever larger sleep bonus. Signed-off-by: Ingo Molnar Signed-off-by: Peter Zijlstra In the patch, vruntime -= calc_delta_fair(sysctl_sched_latency, &cfs_rq->load). Should we call __sched_period to get the first parameter of calc_delta_fair in case there are more than 5 tasks in the runqueue? -yanmin -- 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/