From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============9123196610498255220==" MIME-Version: 1.0 From: Ye Xiaolong To: lkp@lists.01.org Subject: Re: [lkp-robot] [x86/mm] c4c3c3c2d0: will-it-scale.per_process_ops -61.0% regression Date: Wed, 18 Oct 2017 09:59:02 +0800 Message-ID: <20171018015902.GA10466@yexl-desktop> In-Reply-To: <20171017080037.fmgovp53nbvuukzh@pd.tnic> List-Id: --===============9123196610498255220== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On 10/17, Borislav Petkov wrote: >On Tue, Oct 17, 2017 at 06:57:43AM +0200, Markus Trippelsdorf wrote: >> On 2017.10.16 at 18:06 -0700, Andy Lutomirski wrote: >> > On Mon, Oct 16, 2017 at 3:15 AM, Borislav Petkov wrot= e: >> > > On Mon, Oct 16, 2017 at 10:39:17AM +0800, kernel test robot wrote: >> > >> >> > >> Greeting, >> > >> >> > >> FYI, we noticed a -61.0% regression of will-it-scale.per_process_op= s due to commit: >> = >> I think you are reading this wrong: >> -61.0% regression means 61.0% improvement. > >Well, it has this: > >5b8809deb4b0a77f c4c3c3c2d00826c88b5c02c20e >---------------- -------------------------- > %stddev change %stddev > \ | \ > 448554 -61% 174892 will-it-scale.per_process_ops Here 448554 is the average value of will-it-scale.per_process_ops for commi= t 5b8809deb4, while 174892 is the average value of will-it-scale.per_process_ops for comm= it c4c3c3c2d0, metric per_process_ops is calculated through raw output of will-it-scale as= below example. 2017-10-14 23:43:02 ./runtest.py context_switch1 295 process 44 tasks,processes,processes_idle,threads,threads_idle,linear 0,0,100,0,100,0 44,7723745,22.45,0,0.00,0 per_process_ops =3D 7723745 / 44 =3D 175540 percent -61% is computed by (174892 - 448554) / 448554 Thanks, Xiaolong > >Xiaolong, can you first explain what those numbers mean? And how do you >compute those 61%? > >Thx. > >-- = >Regards/Gruss, > Boris. > >Good mailing practices for 400: avoid top-posting and trim the reply. --===============9123196610498255220==-- From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933200AbdJRCBU (ORCPT ); Tue, 17 Oct 2017 22:01:20 -0400 Received: from mga01.intel.com ([192.55.52.88]:31625 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932530AbdJRCBS (ORCPT ); Tue, 17 Oct 2017 22:01:18 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.43,393,1503385200"; d="scan'208";a="1206969520" Date: Wed, 18 Oct 2017 09:59:02 +0800 From: Ye Xiaolong To: Borislav Petkov Cc: Markus Trippelsdorf , Andy Lutomirski , X86 ML , "linux-kernel@vger.kernel.org" , Adam Borowski , Brian Gerst , Johannes Hirte , LKP Subject: Re: [lkp-robot] [x86/mm] c4c3c3c2d0: will-it-scale.per_process_ops -61.0% regression Message-ID: <20171018015902.GA10466@yexl-desktop> References: <20171009170231.fkpraqokz6e4zeco@pd.tnic> <20171016023917.GG26196@yexl-desktop> <20171016101548.v3l3jgcbdogrvbvh@pd.tnic> <20171017045743.GA237@x4> <20171017080037.fmgovp53nbvuukzh@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171017080037.fmgovp53nbvuukzh@pd.tnic> 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 10/17, Borislav Petkov wrote: >On Tue, Oct 17, 2017 at 06:57:43AM +0200, Markus Trippelsdorf wrote: >> On 2017.10.16 at 18:06 -0700, Andy Lutomirski wrote: >> > On Mon, Oct 16, 2017 at 3:15 AM, Borislav Petkov wrote: >> > > On Mon, Oct 16, 2017 at 10:39:17AM +0800, kernel test robot wrote: >> > >> >> > >> Greeting, >> > >> >> > >> FYI, we noticed a -61.0% regression of will-it-scale.per_process_ops due to commit: >> >> I think you are reading this wrong: >> -61.0% regression means 61.0% improvement. > >Well, it has this: > >5b8809deb4b0a77f c4c3c3c2d00826c88b5c02c20e >---------------- -------------------------- > %stddev change %stddev > \ | \ > 448554 -61% 174892 will-it-scale.per_process_ops Here 448554 is the average value of will-it-scale.per_process_ops for commit 5b8809deb4, while 174892 is the average value of will-it-scale.per_process_ops for commit c4c3c3c2d0, metric per_process_ops is calculated through raw output of will-it-scale as below example. 2017-10-14 23:43:02 ./runtest.py context_switch1 295 process 44 tasks,processes,processes_idle,threads,threads_idle,linear 0,0,100,0,100,0 44,7723745,22.45,0,0.00,0 per_process_ops = 7723745 / 44 = 175540 percent -61% is computed by (174892 - 448554) / 448554 Thanks, Xiaolong > >Xiaolong, can you first explain what those numbers mean? And how do you >compute those 61%? > >Thx. > >-- >Regards/Gruss, > Boris. > >Good mailing practices for 400: avoid top-posting and trim the reply.