Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761409Ab3DBIg1 (ORCPT ); Tue, 2 Apr 2013 04:36:27 -0400 Received: from mga01.intel.com ([192.55.52.88]:39134 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751983Ab3DBIgW (ORCPT ); Tue, 2 Apr 2013 04:36:22 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,392,1363158000"; d="scan'208";a="312241770" Message-ID: <515A9859.6000606@intel.com> Date: Tue, 02 Apr 2013 16:35:37 +0800 From: Alex Shi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130221 Thunderbird/17.0.3 MIME-Version: 1.0 To: Michael Wang 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> In-Reply-To: <515A877B.3020908@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1896 Lines: 45 On 04/02/2013 03:23 PM, Michael Wang wrote: >> > [patch v3 8/8] sched: use instant load for burst wake up > I've tested the patch set on 12 cpu X86 box with 3.9.0-rc2, and pgbench > show regression on high-end this time. > > | db_size | clients | tps | | tps | > +---------+---------+-------+ +-------+ > | 22 MB | 1 | 10662 | | 10446 | > | 22 MB | 2 | 21483 | | 20887 | > | 22 MB | 4 | 42046 | | 41266 | > | 22 MB | 8 | 55807 | | 51987 | > | 22 MB | 12 | 50768 | | 50974 | > | 22 MB | 16 | 49880 | | 49510 | > | 22 MB | 24 | 45904 | | 42398 | > | 22 MB | 32 | 43420 | | 40995 | > | 7484 MB | 1 | 7965 | | 7376 | > | 7484 MB | 2 | 19354 | | 19149 | > | 7484 MB | 4 | 37552 | | 37458 | > | 7484 MB | 8 | 48655 | | 46618 | > | 7484 MB | 12 | 45778 | | 45756 | > | 7484 MB | 16 | 45659 | | 44911 | > | 7484 MB | 24 | 42192 | | 37185 | -11.87% > | 7484 MB | 32 | 36385 | | 34447 | > | 15 GB | 1 | 7677 | | 7359 | > | 15 GB | 2 | 19227 | | 19049 | > | 15 GB | 4 | 37335 | | 36947 | > | 15 GB | 8 | 48130 | | 46898 | > | 15 GB | 12 | 45393 | | 43986 | > | 15 GB | 16 | 45110 | | 45719 | > | 15 GB | 24 | 41415 | | 36813 | -11.11% > | 15 GB | 32 | 35988 | | 34025 | > > 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. -- Thanks Alex -- 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/