Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763035AbXJZJpy (ORCPT ); Fri, 26 Oct 2007 05:45:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762731AbXJZJoW (ORCPT ); Fri, 26 Oct 2007 05:44:22 -0400 Received: from mga05.intel.com ([192.55.52.89]:45757 "EHLO fmsmga101.fm.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1756562AbXJZJoT (ORCPT ); Fri, 26 Oct 2007 05:44:19 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.21,332,1188802800"; d="scan'208";a="358992178" Subject: aim7 -30% regression in 2.6.24-rc1 From: "Zhang, Yanmin" To: LKML Cc: mingo@elte.hu Content-Type: text/plain; charset=utf-8 Date: Fri, 26 Oct 2007 17:43:07 +0800 Message-Id: <1193391787.3019.174.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 X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 806 Lines: 18 I tested 2.6.24-rc1 on my x86_64 machine which has 2 quad-core processors. Comparing with 2.6.23, aim7 has about -30% regression. I did a bisect and found patch http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=b5869ce7f68b233ceb81465a7644be0d9a5f3dbb caused the issue. kbuild/SPECjbb2000/SPECjbb2005 also has big regressions. On my another tigerton machine (4 quad-core processors), SPECjbb2005 has more than -40% regression. I didn't do a bisect on such benchmark testing, but I suspect the root cause is like aim7's. -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/