Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760323Ab3DBJNq (ORCPT ); Tue, 2 Apr 2013 05:13:46 -0400 Received: from e28smtp05.in.ibm.com ([122.248.162.5]:46315 "EHLO e28smtp05.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753707Ab3DBJNp (ORCPT ); Tue, 2 Apr 2013 05:13:45 -0400 Message-ID: <515AA13A.5090709@linux.vnet.ibm.com> Date: Tue, 02 Apr 2013 17:13:30 +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: Mike Galbraith CC: Alex Shi , 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, 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> <1364891674.4976.65.camel@marge.simpson.net> In-Reply-To: <1364891674.4976.65.camel@marge.simpson.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-MML: No X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13040209-8256-0000-0000-000006E59CFA Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 856 Lines: 27 On 04/02/2013 04:34 PM, Mike Galbraith wrote: [snip] >> The reason may caused by wake_affine()'s higher overhead, and pgbench is >> really sensitive to this stuff... > > For grins, you could try running the whole thing SCHED_BATCH. (/me sees > singing/dancing red herring whenever wake_affine() and pgbench appear in > the same sentence;) I saw the patch touched the wake_affine(), just interested on what will happen ;-) The patch changed the overhead of wake_affine(), and also influence it's result, I used to think the later one may do some help to the pgbench... Regards, Michael Wang > > -Mike > -- 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/