From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754128AbaHFOFZ (ORCPT ); Wed, 6 Aug 2014 10:05:25 -0400 Received: from mail.wdtv.com ([66.118.69.84]:41134 "EHLO mail.wdtv.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751813AbaHFOFY (ORCPT ); Wed, 6 Aug 2014 10:05:24 -0400 X-Greylist: delayed 442 seconds by postgrey-1.27 at vger.kernel.org; Wed, 06 Aug 2014 10:05:24 EDT From: Gene Heskett To: "Lan, Tianyu" Subject: Re: [PATCH] X86/CPU: Avoid 100ms sleep for cpu offline during S3 Date: Wed, 6 Aug 2014 09:57:58 -0400 Cc: Borislav Petkov , "tglx@linutronix.de" , "mingo@redhat.com" , "hpa@zytor.com" , "x86@kernel.org" , "toshi.kani@hp.com" , "imammedo@redhat.com" , "jan.kiszka@siemens.com" , "mingo@kernel.org" , "huawei.libin@huawei.com" , "prarit@redhat.com" , "linux-kernel@vger.kernel.org" , "Brandt, Todd E" References: <1407142742-29202-1-git-send-email-tianyu.lan@intel.com> <20140806110748.GC27033@pd.tnic> <4CFBC02C07DA244CA19D6815A05BE6EE0119E1CF@SHSMSX103.ccr.corp.intel.com> In-Reply-To: <4CFBC02C07DA244CA19D6815A05BE6EE0119E1CF@SHSMSX103.ccr.corp.intel.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="windows-1256" Content-Transfer-Encoding: 7bit Message-Id: <201408060957.59268.gheskett@wdtv.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 06 August 2014, Lan, Tianyu wrote: >Have you tried my attached kernel config file? When someone reported >the issue to me, I also was very hard to reproduce the issue by my own >config file. Maybe once 100 tries. But I can reproduced the issue every >time with the attached configure file on several my machines and even >on server. There was no attachment. > >-----Original Message----- >From: Borislav Petkov [mailto:bp@alien8.de] >Sent: Wednesday, August 06, 2014 7:08 PM >To: Lan, Tianyu >Cc: tglx@linutronix.de; mingo@redhat.com; hpa@zytor.com; x86@kernel.org; >toshi.kani@hp.com; imammedo@redhat.com; jan.kiszka@siemens.com; >mingo@kernel.org; huawei.libin@huawei.com; prarit@redhat.com; >linux-kernel@vger.kernel.org; Brandt, Todd E Subject: Re: [PATCH] >X86/CPU: Avoid 100ms sleep for cpu offline during S3 > >On Tue, Aug 05, 2014 at 05:29:18PM +0800, Lan Tianyu wrote: >> I think you can pull Tod's tool from git hub and do test from your >> laptop. I attached a configure file come from ubuntu which is easier >> to produce the issue. You can use it to reproduce the issue. > >Right, so I ran it on an old dualcore AMD laptop I have lying around >here and it didn't show any difference with or without your patch. > >For all 4 runs I did with the tool running it without any arguments (so >it did the default thing), I got suspend time for CPU1 of 4-6 msec and >resume of ~20msec. > >I don't know whether it is the dual core or AMD but your patch doesn't >change anything on that laptop which is ok, I'd guess. > >> Ok. BTW, I have tested it on the Ivbridge and Haswell machines. > >Yeah, add those numbers to the commit message too. > >Thanks. > >-- >Regards/Gruss, > Boris. > >Sent from a fat crate under my desk. Formatting is fine. >-- Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS