From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751680AbaCGLc4 (ORCPT ); Fri, 7 Mar 2014 06:32:56 -0500 Received: from mga02.intel.com ([134.134.136.20]:9683 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751451AbaCGLcz (ORCPT ); Fri, 7 Mar 2014 06:32:55 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,607,1389772800"; d="scan'208";a="495781567" Message-ID: <5319AE49.2000606@intel.com> Date: Fri, 07 Mar 2014 19:32:25 +0800 From: Jet Chen Reply-To: 20140305110238.GS9987@twins.programming.kicks-ass.net User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Peter Zijlstra CC: linux-kernel@vger.kernel.org, Thomas Gleixner , Kirill Tkhai , Juri Lelli , Fengguang Wu Subject: Re: [sched/idle] c365c292d05: ltp.sched_rr_get_interval02.1.TFAIL Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Peter, > Does: http://lkml.kernel.org/r/20140301191838.d15d03112b2598a671dac22c@gmail.com > > Fix it? Both patches can fix the LTP regression. We applied each of Juri's and Kirill's patches on top of Thomas' commit, and here are the comparisons: test case: ltp/syscalls Thomas' Juri's c365c292d05908c ffc78ca31d51f90c516bb50cf --------------- ------------------------- 1 ~ 0% -100.0% 0 ~ 0% TOTAL ltp.sched_rr_get_interval02.1.TFAIL 73790 ~ 5% -14.1% 63363 ~ 6% TOTAL interrupts.IWI 3040 ~ 4% -6.7% 2836 ~ 5% TOTAL slabinfo.kmalloc-128.num_objs Thomas' Kirill's c365c292d05908c f4262311faf6f326bf27fb1f4 --------------- ------------------------- 1 ~ 0% -100.0% 0 ~ 0% TOTAL ltp.sched_rr_get_interval02.1.TFAIL 3618 ~ 6% -13.2% 3141 ~ 6% TOTAL slabinfo.anon_vma.active_objs 3671 ~ 5% -11.3% 3258 ~ 4% TOTAL slabinfo.anon_vma.num_objs 8.41 ~ 2% -5.1% 7.98 ~ 3% TOTAL boottime.dhcp 15.90 ~ 2% -3.2% 15.40 ~ 2% TOTAL boottime.boot 55.18 ~ 1% -2.6% 53.73 ~ 1% TOTAL boottime.idle Thanks, -Jet