From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753752AbaCEMtR (ORCPT ); Wed, 5 Mar 2014 07:49:17 -0500 Received: from mga11.intel.com ([192.55.52.93]:52779 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752250AbaCEMtQ (ORCPT ); Wed, 5 Mar 2014 07:49:16 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,592,1389772800"; d="scan'208";a="486433102" Date: Wed, 5 Mar 2014 20:49:13 +0800 From: Fengguang Wu To: "Rafael J. Wysocki" Cc: "Rafael J. Wysocki" , LKML , lkp@01.org Subject: Re: [ACPI / hotplug / PCI] 1b360f44d00: -80.9% vm-scalability.stddev Message-ID: <20140305124913.GA9649@localhost> References: <20140305082336.GD17109@localhost> <1530281.asBBpMI1MW@vostro.rjw.lan> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1530281.asBBpMI1MW@vostro.rjw.lan> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Mar 05, 2014 at 01:58:54PM +0100, Rafael J. Wysocki wrote: > On Wednesday, March 05, 2014 04:23:36 PM Fengguang Wu wrote: > > Hi Rafael, > > Hi, > > > I don't know why but we are glad to find the below changes on commit > > Do I understand correcty that you mean you're seeing improvement? Yes - the random multi-thread malloc test's deviation is reduced noticeably. > Either way, if the test below doesn't involve hotplug or device removal via > sysfs, I have no explanation ... OK. Thanks, Fengguang > > 1b360f44d009059e446532f29c1a889951e72667 ("ACPI / hotplug / PCI: Fix bridge removal race in handle_hotplug_event()") > > > > test case: brickland2/micro/vm-scalability/300s-anon-r-rand-mt > > > > d42f5da23400833 1b360f44d009059e446532f29 > > --------------- ------------------------- > > 3.54 ~164% -80.9% 0.68 ~37% TOTAL vm-scalability.stddev > > 14177 ~ 7% -22.1% 11040 ~ 7% TOTAL numa-meminfo.node0.SReclaimable > > 3543 ~ 7% -22.1% 2759 ~ 7% TOTAL numa-vmstat.node0.nr_slab_reclaimable > > 776196 ~ 6% -10.0% 698893 ~ 5% TOTAL numa-numastat.node2.local_node > > 776196 ~ 6% -10.0% 698894 ~ 5% TOTAL numa-numastat.node2.numa_hit > > > > The ~XX% numbers are stddev percent. > > The [+-]XX% is change percent. > > > > The below graph shows all samples collected during the bisect > > > > [*] bisect-good > > [O] bisect-bad ("bad" in the sense of bisect) > > > > In which you can see the stableness of the change and bisect. > > > > vm-scalability.stddev > > > > 16 ++--------------------------------------------------------------------+ > > | * | > > 14 ++ : | > > 12 ++ : | > > | :: | > > 10 ++ :: | > > | :: | > > 8 ++ :: | > > | : : | > > 6 ++ * : : | > > 4 ++ * * :: : : | > > | +: : + * : : : : | > > 2 ++*. *. .* : : * .*. + : : : .* : : | > > |+ * + * *. .* O *.*.*. .** O.**.O.* O: *.O.* O OO.* + : *.| > > 0 O+O-OO-O-O-O-OO-O-O---OO-O-O-O-OO-O---OO-*-O---OO-*-O------O-O-*-*----* > > > > > > Thanks, > > Fengguang > > -- > > 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/ > > -- > I speak only for myself. > Rafael J. Wysocki, Intel Open Source Technology Center.