From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753113AbaHFNO0 (ORCPT ); Wed, 6 Aug 2014 09:14:26 -0400 Received: from mga02.intel.com ([134.134.136.20]:50175 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751549AbaHFNOY (ORCPT ); Wed, 6 Aug 2014 09:14:24 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,811,1400050800"; d="scan'208";a="554575002" From: "Lan, Tianyu" To: Borislav Petkov 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 Thread-Topic: [PATCH] X86/CPU: Avoid 100ms sleep for cpu offline during S3 Thread-Index: AQHPr8KvpaX7HAgFk0W7O5vf/xRx7pu/toGAgAGXe4D//9FOgIAAoKYAgAEnvgCAAKebMA== Date: Wed, 6 Aug 2014 13:13:21 +0000 Message-ID: <4CFBC02C07DA244CA19D6815A05BE6EE0119E1CF@SHSMSX103.ccr.corp.intel.com> References: <1407142742-29202-1-git-send-email-tianyu.lan@intel.com> <20140804102301.GB4808@pd.tnic> <53E04457.2060507@intel.com> <20140805075419.GA18234@pd.tnic> <53E0A3EE.50708@intel.com> <20140806110748.GC27033@pd.tnic> In-Reply-To: <20140806110748.GC27033@pd.tnic> Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id s76DEYAF011245 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. -----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. -- {.n++%ݶw{.n+{G{ayʇڙ,jfhz_(階ݢj"mG?&~iOzv^m ?I