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

Linux 3.10 Gets New ARM, AMD Power Improvements

Linux Kernel

Published on 30 April 2013 10:19 AM EDT
Written by Michael Larabel in Linux Kernel
Comment On This Article

Along with an assortment of other power management improvements to land with the Linux 3.10 kernel, a cpufreq driver for ARM's big.LITTLE is being introduced. There's also a cpufreq driver for the Exynos 5440 quad-core and the new AMD frequency sensitivity feedback support.

In the power management pull request for Linux 3.10, PM subsystem maintainer Rafael J. Wysocki confirms the most interesting feature is the cpufreq driver for big.LITTLE.

Should you not be familiar with the big.LITTLE architecture, it's about pairing low-power processor cores with more powerful -- but more power-consuming -- cores. With the forthcoming Samsung Exynos 5 Octa SoC, the big.LITTLE design is implemented as a 1.6~1.8GHz Cortex-A15 quad-core design while falling back to a 1.2GHz quad-core Cortex-A7 when wanting to conserve power and not needing to do much work. Kernel work on big.LITTLE has been ongoing for a while and now there's a mainline cpufreq driver for handling frequency switching.

Another big change is AMD's frequency sensitivity feedback power-save bias.

Other power management changes for the Linux 3.10 kernel include a Samsung Exynos 5440 cpufreq driver, cpufreq core clean-up, cpufreq scalability improvements, cpuidle improvements, and Intel Lynxpoint LPSS (Low-Power Subsystem) improvements.

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 Articles & Reviews
  1. NVIDIA's $1000+ GeForce GTX TITAN X Delivers Maximum Linux Performance
  2. OS X 10.10 vs. Ubuntu 15.04 vs. Fedora 21 Tests: Linux Sweeps The Board
  3. The New Place Where Linux Code Is Constantly Being Benchmarked
  4. 18-GPU NVIDIA/AMD Linux Comparison Of BioShock: Infinite
  5. Phoronix Test Suite 5.6 Adds New Phoromatic Enterprise Benchmarking Features
  6. OpenGL Threaded Optimizations Responsible For NVIDIA's Faster Performance?
Latest Linux News
  1. Debian 8.0 Jessie RC2 Installer Released
  2. Shadow Warrior Is Being Released For Linux Next Week
  3. Intel Pushes A Bunch Of Broadwell Code Into Coreboot
  4. Open-Source Driver Fans Will Love NVIDIA's New OpenGL Demo
  5. GHC 7.10.1 Brings New Compiler Features
  6. Git 2.4.0-rc0 Does A Ton Of Polishing
  7. The Most Common, Annoying Issue When Benchmarking Ubuntu On Many Systems
  8. Mesa Is At Nearly 1,500 Commits This Year
  9. Gestures & Other GTK3 Features For LibreOffice
  10. It's Now Easier To Try PHP 7 On Fedora & RHEL
Most Viewed News This Week
  1. Introducing The Library Operating System For Linux
  2. AMD Is Hiring Two More Open-Source Linux GPU Driver Developers
  3. New SecureBoot Concerns Arise With Windows 10
  4. GNOME Shell & Mutter 3.16.0 Released
  5. GNU Nano 2.4.0 Brings Complete Undo System, Linter Support & More
  6. Systemd Change Allows For Stateless Systems With Tmpfs
  7. Red Hat Is Rolling Out A VirtIO DRM/KMS GPU Driver
  8. GCC 5 Compiler Is Getting Close To Being Released
%%CLICK_URL_UNESC%%