From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933091AbbFIJvj (ORCPT ); Tue, 9 Jun 2015 05:51:39 -0400 Received: from mail-bn1bon0136.outbound.protection.outlook.com ([157.56.111.136]:18132 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933008AbbFIJui (ORCPT ); Tue, 9 Jun 2015 05:50:38 -0400 Authentication-Results: spf=none (sender IP is 165.204.84.221) smtp.mailfrom=amd.com; amacapital.net; dkim=none (message not signed) header.d=none; X-WSS-ID: 0NPO8OA-07-2GS-02 X-M-MSG: Date: Tue, 9 Jun 2015 17:48:56 +0800 From: Huang Rui To: Peter Zijlstra CC: Borislav Petkov , Andy Lutomirski , Thomas Gleixner , "Rafael J. Wysocki" , Len Brown , John Stultz , =?iso-8859-1?Q?Fr=E9d=E9ric?= Weisbecker , "linux-kernel@vger.kernel.org" , "x86@kernel.org" , "Fengguang Wu" , Aaron Lu , "Suthikulpanit, Suravee" , "Li, Tony" , "Xue, Ken" Subject: Re: [PATCH v2 1/4] x86, mwaitt: add monitorx and mwaitx instruction Message-ID: <20150609094856.GA17030@hr-slim.amd.com> References: <1433819621-15093-1-git-send-email-ray.huang@amd.com> <1433819621-15093-2-git-send-email-ray.huang@amd.com> <20150609082306.GN3644@twins.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20150609082306.GN3644@twins.programming.kicks-ass.net> User-Agent: Mutt/1.5.21 (2010-09-15) X-EOPAttributedMessage: 0 X-Microsoft-Exchange-Diagnostics: 1;BN1AFFO11FD019;1:o1u10bGUQmhzG6enFJu7n+zAPzC6r4XhzHfstJx1ufidHpResnaUEa/NycK7SMoomLr2yJevnbKD+vBqNk4x7oDDSkAKz/7oiRB4D9cmSstl3uMcVa4vTg2O0+jgPhhF8zren5EZNwqtcfPbJw3/xej0H+zB9htBwE+M5dyaqjXaapvwctntOlushV/DbvKsAuhJAL1nRUV5yYpEKMuU9O8NT2mIfYO9g7Pd75Gj3Y1i1zIUxUIP2O4DPK1lUFI3RgBrmX0eoJhFTro4AJ23Mpf/6UPpAbo+epOQP5hUZCdm4Xy5z123e9OqFemDiMgd1M5rxP6SLnAoAinU76aLTw== X-Forefront-Antispam-Report: CIP:165.204.84.221;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10019020)(6009001)(428002)(24454002)(51704005)(189002)(199003)(164054003)(4001350100001)(92566002)(33656002)(101416001)(50466002)(46406003)(54356999)(105586002)(110136002)(47776003)(23726002)(62966003)(77156002)(106466001)(189998001)(97756001)(87936001)(50986999)(46102003)(83506001)(76176999)(53416004)(2950100001)(77096005)(86362001);DIR:OUT;SFP:1102;SCL:1;SRVR:BN1PR02MB070;H:atltwp01.amd.com;FPR:;SPF:None;MLV:sfv;MX:1;A:1;LANG:en; X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:BN1PR02MB070; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0;PCL:0;RULEID:(601004)(520003)(5005006)(3002001);SRVR:BN1PR02MB070;BCL:0;PCL:0;RULEID:;SRVR:BN1PR02MB070; X-Forefront-PRVS: 06022AA85F X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Jun 2015 09:50:35.1847 (UTC) X-MS-Exchange-CrossTenant-Id: fde4dada-be84-483f-92cc-e026cbee8e96 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=fde4dada-be84-483f-92cc-e026cbee8e96;Ip=[165.204.84.221];Helo=[atltwp01.amd.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN1PR02MB070 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jun 09, 2015 at 04:23:06PM +0800, Peter Zijlstra wrote: > On Tue, Jun 09, 2015 at 11:13:38AM +0800, Huang Rui wrote: > > > > MWAITX ECX[1]: enable timer if set > > MWAITX EBX[31:0]: max wait time expressed in SW P0 clocks > > > > The software P0 frequency is the same as the TSC frequency. > > > > Max timeout = EBX/(TSC frequency) > > ^ that, would make a lovely comment for this v > Any better suggestion? EBX * (TSC cycle) ? :) Thanks, Rui