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

IBM: Memory Power Management Savings Measurable

Hardware

Published on 12 November 2013 05:13 PM EST
Written by Michael Larabel in Hardware
6 Comments

An IBM Linux Technology Center has shared that enabling experimental memory power management within the Linux kernel has dropped one of their test system's power consumption by about 2.6% but it's likely even more with experimental hardware.

Srivatsa S. Bhat of IBM had presented at the Kernel Summit and then today shared his power experiments from his machine. First of all, his machine isn't what most people will ever experience: an IBM Power 7 system with four CPUs making up 32 cores and there's 128GB of RAM. With this system, testing out kernel power memory management had dropped his system's power consumption by up to 2.6%.

While this hardware is a bit extreme with 32 cores and 128GB of RAM, it isn't even an ideal system as there's only four memory regions for handling power savings. Srivatsa said there's prototype IBM hardware that can handle more memory regions and lower base power consumption where he believes the system power savings could be up to 5% with this feature.

For those not familiar with the active work on memory power savings by the Linux kernel, see Linux Kernel Power Management Targeting Memory. Srivatsa's findings can be found on the kernel mailing list with more details.

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. Intel Broadwell: GCC 4.9 vs. LLVM Clang 3.5 Compiler Benchmarks
  2. Ubuntu vs. Fedora Linux On Lenovo's X1 Carbon With Core i7 Broadwell
  3. Ubuntu 15.04 Is The Easy Path To Better Performance On Intel Broadwell
  4. NVIDIA's Latest Maxwell Line-Up Against AMD With Catalyst On Linux
  5. Preliminary Tests Of Intel Sandy Bridge & Ivy Bridge vs. Broadwell
  6. AMD FX-8320E Performance On Linux
Latest Linux News
  1. Linux Benchmarking... Even Faster & A Very Interesting February
  2. Does VirtualBox VM Have Much A Future Left?
  3. HAMMER2 File-System Is Still Slowly Coming Together
  4. The Better Looking Window Decorations For GNOME 3.16
  5. Libinput 0.9 Adds Support For Hovering Fingers On Touchpads
  6. Free Software Foundation Endorses Another (Outdated) Laptop
  7. DNF Plugins Extend The Functionality Of Fedora's Yum Successor
  8. LibreOffice 4.4 Released With Better OOXML Support, UI Improvements
  9. Inkscape 0.91 Goes Through C++ Code Conversion, New Cairo Rendering, OpenMP Filters
  10. New Mesa Patch To Improve CPU-Bound Applications
Most Viewed News This Week
  1. PlayStation 4 System Compiler Support Landing In LLVM
  2. LibreOffice 4.4 Is Coming Soon With New Features
  3. Linux "GHOST" Vulnerability Hits Glibc Systems
  4. My Initial Intel Broadwell Linux Experience With The ThinkPad X1 Carbon
  5. Broadwell Linux Ultrabook Running MUCH Cooler Than Haswell
  6. LZHAM 1.0 Lossless Data Compression Codec Released
  7. Linux Users Upset By Chromium's Busted HiDPI Support
  8. Vivaldi: A New Chromium-Powered, Multi-Platform Browser