From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S968160Ab3HJAcM (ORCPT ); Fri, 9 Aug 2013 20:32:12 -0400 Received: from mga02.intel.com ([134.134.136.20]:7398 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S968043Ab3HJAcK (ORCPT ); Fri, 9 Aug 2013 20:32:10 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.89,849,1367996400"; d="scan'208";a="384722261" Message-ID: <52058BAE.30703@linux.intel.com> Date: Fri, 09 Aug 2013 17:39:10 -0700 From: Srinivas Pandruvada User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 MIME-Version: 1.0 To: Srinivas Pandruvada CC: linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, rjw@sisk.pl, arjan@linux.intel.com, len.brown@intel.com, jacob.jun.pan@linux.intel.com, corbet@lwn.net, joe@perches.com, Linux PM list Subject: Re: [RFC v02 0/5] Power Capping Framework and RAPL Driver References: <1375891965-6921-1-git-send-email-srinivas.pandruvada@linux.intel.com> In-Reply-To: <1375891965-6921-1-git-send-email-srinivas.pandruvada@linux.intel.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/07/2013 09:12 AM, Srinivas Pandruvada wrote: > Overview > With the evolution of technologies, which enables power monitoring and limiting, > more and more devices are able to constrain their power consumption under certain > limits. There are several use cases for such technologies: > - Power monitoring: Each device can report its power consumption. > - Power Limiting: Setting power limits on the devices allows users to guard against > platform reaching max system power level. > - Maximize performance: While staying below a power limit, it allows devices to > automatically adjust performance to meet demands > - Dynamic control and re-budgeting: If each device can be constrained to some power, > extra power can redistributed to other devices, which needs additional performance. > > One such example of technology is RAPL (Running Average Power Limit) mechanism > available in the latest Intel Processors. Intel is slowly adding many devices under > RAPL control. Also there are other technologies available, for power capping various > devices. Soon it is very likely that other vendors are also adding or considering > such implementation. > > Power Capping framework is an effort to have a uniform interface available to Linux > drivers, which will enable > - A uniform sysfs interface for all devices which can offer power capping > - A common API for drivers, which will avoid code duplication and easy > implementation of client drivers. > > Also submitting Intel RAPL driver using power capping framework. > > > Revisions: Thanks for everyone for review. I have received enough negative comments, which will require another version. So please hold off your reviews till next version. > v02: > Sign-offs and reviewed-by tags > Stylistic issues suggested by Joe Perches > Removed "counter" from power_uw documentation as pointed by Jonathan Corbet > Submitting Intel RAPL driver using power capping framework > > v01: > Use device model only to register zones and controllers. > > v00: > Presented options > > Jacob Pan (2): > x86/msr: add 64bit _on_cpu access functions > Introduce Intel RAPL power capping driver > > Srinivas Pandruvada (3): > PowerCap: Documentation > PowerCap: Add class driver > PowerCap: Added to drivers build > > Documentation/ABI/testing/sysfs-class-powercap | 165 +++ > Documentation/powercap/PowerCappingFramework.txt | 686 ++++++++++++ > arch/x86/include/asm/msr.h | 22 + > arch/x86/lib/msr-smp.c | 62 + > drivers/Kconfig | 2 + > drivers/Makefile | 1 + > drivers/powercap/Kconfig | 24 + > drivers/powercap/Makefile | 6 + > drivers/powercap/intel_rapl.c | 1305 ++++++++++++++++++++++ > drivers/powercap/powercap_sys.c | 995 +++++++++++++++++ > include/linux/powercap.h | 300 +++++ > 11 files changed, 3568 insertions(+) > create mode 100644 Documentation/ABI/testing/sysfs-class-powercap > create mode 100644 Documentation/powercap/PowerCappingFramework.txt > create mode 100644 drivers/powercap/Kconfig > create mode 100644 drivers/powercap/Makefile > create mode 100644 drivers/powercap/intel_rapl.c > create mode 100644 drivers/powercap/powercap_sys.c > create mode 100644 include/linux/powercap.h >