Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759814Ab3DBJ6W (ORCPT ); Tue, 2 Apr 2013 05:58:22 -0400 Received: from e23smtp06.au.ibm.com ([202.81.31.148]:39215 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753235Ab3DBJ6V (ORCPT ); Tue, 2 Apr 2013 05:58:21 -0400 Message-ID: <515AA8B8.2090009@linux.vnet.ibm.com> Date: Tue, 02 Apr 2013 17:45:28 +0800 From: Michael Wang User-Agent: Mozilla/5.0 (X11; Linux i686; rv:16.0) Gecko/20121011 Thunderbird/16.0.1 MIME-Version: 1.0 To: Alex Shi CC: mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, akpm@linux-foundation.org, arjan@linux.intel.com, bp@alien8.de, pjt@google.com, namhyung@kernel.org, efault@gmx.de, morten.rasmussen@arm.com, vincent.guittot@linaro.org, gregkh@linuxfoundation.org, preeti@linux.vnet.ibm.com, viresh.kumar@linaro.org, linux-kernel@vger.kernel.org, len.brown@intel.com, rafael.j.wysocki@intel.com, jkosina@suse.cz, clark.williams@gmail.com, tony.luck@intel.com, keescook@chromium.org, mgorman@suse.de, riel@redhat.com Subject: Re: [patch v3 0/8] sched: use runnable avg in load balance References: <1364873008-3169-1-git-send-email-alex.shi@intel.com> <515A877B.3020908@linux.vnet.ibm.com> <515A9859.6000606@intel.com> In-Reply-To: <515A9859.6000606@intel.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit x-cbid: 13040209-7014-0000-0000-000002CC88A5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 951 Lines: 28 On 04/02/2013 04:35 PM, Alex Shi wrote: > On 04/02/2013 03:23 PM, Michael Wang wrote: [snip] >> >> The reason may caused by wake_affine()'s higher overhead, and pgbench is >> really sensitive to this stuff... > > Thanks for testing. Could you like to remove the last patch and test it > again? I want to know if the last patch has effect on pgbench. Amazing, without the last one, pgbench show very good improvement, higher than 10ms throttle, lower than 100ms throttle, I need confirm this with a night-through testing. I will look into those patches in detail later, I think it addressed part of the wake_affine() issue (make the decision more accurately), that's nice ;-) Regards, Michael Wang > -- 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/