1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Intel Is Still Working On Linux Power Capping

Intel

Published on 19 September 2013 02:29 PM EDT
Written by Michael Larabel in Intel
Comment On This Article

It's been a while since last hearing anything from Intel engineers about their proposed Power Capping Framework or Running Average Power Limit driver for the Linux kernel, but that changed today. New patches have been released for the power monitoring and limiting kernel code.

The Power Capping Framework and RAPL driver were combined today into a new patch series by Srinivas Pandruvada. For modern hardware that supports such capabilities, this code is about power monitoring of individual devices, support for setting power limits on individual devices to avoid reaching a maximum system power level, maximizing performance while staying below a certain power limit, and dynamically controlling and re-budgeting power use.

The RAPL (Running Average Power Limit) driver takes advantage of the latest Intel CPUs for power capping different devices and are also hoping other vendors will implement similar hardware functionality. The Power Capping framework for the Linux kernel seeks to provide a uniform sysfs interface for exposing devices that can be power-capped and to provide a common API for Linux drivers.

This code has already been proposed before under an "RFC" flag but today's patches remove that tag and are going under a "v1" status -- it looks like this code may be ready for merging into the Linux 3.13 kernel. The patches can be found on the Linux kernel mailing list.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. AMD Radeon R9 290: Gallium3D vs. Catalyst Drivers
  2. AMD Radeon R9 290 Open-Source Driver Works, But Has A Ways To Go
  3. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
  4. Sumo's Omni Gets Reloaded
Latest Linux Articles
  1. Testing For The Latest Linux Kernel Power Regression
  2. The Most Energy Efficient Radeon GPU For AMD Linux Gaming
  3. 20-Way Radeon Comparison With Open-Source Graphics For Steam On Linux Gaming
  4. Preview: OS X 10.10 Yosemite vs. Ubuntu Linux GPU Performance
Latest Linux News
  1. Chrome 38 Now In Beta With Exciting Advancements
  2. Ubuntu's Utopic Unicorn 14.10 Beta 1 Released
  3. Genode OS 14.08 Has New GUI Architecture, Pluggable VFS
  4. Another Intel Linux Power Regression Is Being Investigated
  5. DNF Makes It A Step Closer To Replacing Yum On Fedora
  6. OS Battle: Linux Takes 1.7% Desktop Marketshare
  7. PHP 5.6 Officially Released With New Debugger
  8. LibreOffice 4.3.1 Released
  9. Re-Clocking Your NVIDIA GPU With Nouveau On Linux 3.17
  10. Radeon DRM Queues More Changes, RV6xx UVD For Linux 3.18
Latest Forum Discussions
  1. Users defect to Linux as OpenBSD removes Lynx from base system
  2. Best Radeon for a Power Mac G5?
  3. Canonical Joined The Khronos Group To Help Mir/Wayland Drivers
  4. OC capability - Intel Core i5 4690K & Biostar Hi-Fi Z97WE
  5. Updated and Optimized Ubuntu Free Graphics Drivers
  6. AMD Releases UVD Video Decode Support For R600 GPUs
  7. Announcing radeontop, a tool for viewing the GPU usage
  8. It's Now Possible To Play Netflix Natively On Linux Without Wine Plug-Ins