Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757827Ab0BMSup (ORCPT ); Sat, 13 Feb 2010 13:50:45 -0500 Received: from mga11.intel.com ([192.55.52.93]:27258 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757690Ab0BMSuo (ORCPT ); Sat, 13 Feb 2010 13:50:44 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.49,468,1262592000"; d="scan'208";a="540542249" Subject: Re: change in sched cpu_power causing regressions with SCHED_MC From: Suresh Siddha Reply-To: Suresh Siddha To: "svaidy@linux.vnet.ibm.com" Cc: Peter Zijlstra , Ingo Molnar , LKML , "Ma, Ling" , "Zhang, Yanmin" , "ego@in.ibm.com" In-Reply-To: <20100213183735.GD5882@dirshya.in.ibm.com> References: <1266023662.2808.118.camel@sbs-t61.sc.intel.com> <1266024679.2808.153.camel@sbs-t61.sc.intel.com> <1266057388.557.59599.camel@twins> <1266057724.557.59610.camel@twins> <20100213183735.GD5882@dirshya.in.ibm.com> Content-Type: text/plain Organization: Intel Corp Date: Sat, 13 Feb 2010 10:49:40 -0800 Message-Id: <1266086980.2677.52.camel@sbs-t61> Mime-Version: 1.0 X-Mailer: Evolution 2.26.3 (2.26.3-1.fc11) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1053 Lines: 28 On Sat, 2010-02-13 at 10:37 -0800, Vaidyanathan Srinivasan wrote: > * Peter Zijlstra [2010-02-13 11:42:04]: > > BTW, do you think its possible to automate such test cases and put them > > in a test-suite? > > Linux Test Project (LTP) has some test cases for sched_mc/smt > balancing. It is very unfortunate that neither this nor Linux-kernel performance tests that Yanmin and co tracks has caught these problems much before. Ling Ma's focused tests/analysis for something else started showing these basic issues. > They can be improved and generalized to include all basic > scheduler task placement checks. Probably it is best if we can include the very basic checks/tests in the kernel itself. More focused and extensive tests can be done outside the kernel. thanks, suresh -- 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/