From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751274Ab3K1M01 (ORCPT ); Thu, 28 Nov 2013 07:26:27 -0500 Received: from mail-bk0-f41.google.com ([209.85.214.41]:60215 "EHLO mail-bk0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750835Ab3K1M0X (ORCPT ); Thu, 28 Nov 2013 07:26:23 -0500 Date: Thu, 28 Nov 2013 13:26:19 +0100 From: Ingo Molnar To: Vince Weaver Cc: Stephane Eranian , LKML , Peter Zijlstra , "mingo@elte.hu" , "ak@linux.intel.com" , Arnaldo Carvalho de Melo , Jiri Olsa , "Yan, Zheng" , Borislav Petkov , Maria Dimakopoulou Subject: Re: [PATCH v7 3/4] perf,x86: add Intel RAPL PMU support Message-ID: <20131128122619.GA6561@gmail.com> References: <1384275531-10892-1-git-send-email-eranian@google.com> <1384275531-10892-4-git-send-email-eranian@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 * Vince Weaver wrote: > On Wed, 27 Nov 2013, Stephane Eranian wrote: > > > On Wed, Nov 27, 2013 at 7:35 PM, Vince Weaver wrote: > > > > So I notice PP1 (which is the GPU power on non-server chips) > > > is not supported. > > > > > > Is that just for simplicity? > > > > > Does it work on specific models only? I bet so. How to detect those? > > In general it is on the machines that don't support the DRAM measurements > (so the non-EP machines) but I don't know if there's a nice list anywhere. > > Intel manuals say: > For a client platform, PP1 domain refers to the power plane of a > specific device in the uncore. For server platforms, PP1 domain is not > supported, > > usually PP1 I think maps to the embedded GPU. It would indeed be nice to expose PP1 too via the same facility - Haswell and later spends some 40% of the CPU die on the integrated GPU and people end up using it. Thanks, Ingo