Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758025AbXK0Jea (ORCPT ); Tue, 27 Nov 2007 04:34:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753693AbXK0JeW (ORCPT ); Tue, 27 Nov 2007 04:34:22 -0500 Received: from mga10.intel.com ([192.55.52.92]:51705 "EHLO fmsmga102.fm.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752458AbXK0JeV (ORCPT ); Tue, 27 Nov 2007 04:34:21 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.23,218,1194249600"; d="scan'208";a="404215075" Subject: sched_yield: delete sysctl_sched_compat_yield From: "Zhang, Yanmin" To: mingo@elte.hu Cc: LKML Content-Type: text/plain; charset=utf-8 Date: Tue, 27 Nov 2007 17:33:05 +0800 Message-Id: <1196155985.25646.31.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: 872 Lines: 21 If echo "1">/proc/sys/kernel/sched_compat_yield before starting volanoMark testing, the result is very good with kernel 2.6.24-rc3 on my 16-core tigerton. 1) If /proc/sys/kernel/sched_compat_yield=1, comparing with 2.6.22, 2.6.24-rc3 has more than 70% improvement; 2) If /proc/sys/kernel/sched_compat_yield=0, comparing with 2.6.22, 2.6.24-rc3 has more than 80% regression; On other machines, the volanoMark result also has much improvement if /proc/sys/kernel/sched_compat_yield=1. Would you like to change function yield_task_fair to delete codes around sysctl_sched_compat_yield, or just initiate it to 1? Thanks, 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/