Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752970AbbHaN0J (ORCPT ); Mon, 31 Aug 2015 09:26:09 -0400 Received: from bh-25.webhostbox.net ([208.91.199.152]:33588 "EHLO bh-25.webhostbox.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753049AbbHaN0H (ORCPT ); Mon, 31 Aug 2015 09:26:07 -0400 Message-ID: <55E455E8.1060208@roeck-us.net> Date: Mon, 31 Aug 2015 06:26:00 -0700 From: Guenter Roeck User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.8.0 MIME-Version: 1.0 To: Peter Zijlstra , Borislav Petkov CC: Ingo Molnar , Huang Rui , Borislav Petkov , Jean Delvare , Andy Lutomirski , Andreas Herrmann , Thomas Gleixner , "Rafael J. Wysocki" , Len Brown , John Stultz , =?windows-1252?Q?Fr=E9d=E9ric_Weisbecker?= , lm-sensors@lm-sensors.org, linux-kernel@vger.kernel.org, x86@kernel.org, Andreas Herrmann , Aravind Gopalakrishnan , Fengguang Wu , Aaron Lu , Tony Li Subject: Re: [PATCH 09/15] x86, amd: add accessor for number of cores per compute unit References: <1440662866-28716-1-git-send-email-ray.huang@amd.com> <1440662866-28716-10-git-send-email-ray.huang@amd.com> <20150828064814.GB20153@nazgul.tnic> <20150828080418.GB13309@gmail.com> <20150829091914.GA8878@gmail.com> <20150830155322.GA26370@nazgul.tnic> <20150831083821.GE16853@twins.programming.kicks-ass.net> In-Reply-To: <20150831083821.GE16853@twins.programming.kicks-ass.net> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Authenticated_sender: linux@roeck-us.net X-OutGoing-Spam-Status: No, score=0.0 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - bh-25.webhostbox.net X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - roeck-us.net X-Get-Message-Sender-Via: bh-25.webhostbox.net: authenticated_id: linux@roeck-us.net X-Source: X-Source-Args: X-Source-Dir: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1139 Lines: 29 On 08/31/2015 01:38 AM, Peter Zijlstra wrote: > On Sun, Aug 30, 2015 at 05:53:22PM +0200, Borislav Petkov wrote: >> On Sat, Aug 29, 2015 at 11:19:14AM +0200, Ingo Molnar wrote: >>> So let me withdraw my ack: the much more important question that I >>> missed first time around, why is this reporting feature living in >>> hwmon, not in perf? We have energy reporting facilities in perf that >>> this should be synced to. >> >> Because there's already fam15h_power driver which is exactly for that. >> Making it part of perf is then a question of cat-ting the same sysfs >> file twice, at the beginning and at the end of the trace, which is >> trivial. > > That don't make sense. > > Looking at the BKDG Fam 15h 60h-6Fh these MSRs are per compute unit. > This means you can do much finer grained measurements than system wide > -- which is all hwmon seems capable of. > Is it ? Why ? Guenter -- 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/