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 Linux Hardware Reviews
  1. Scythe Mugen MAX
  2. Intel Core i7 5960X Haswell-E On Linux
  3. Intel 80GB 530 Series M.2 SSD On Linux
  4. With A New Motherboard, The Core i7 5960X Haswell-E Lights Up
Latest Linux Articles
  1. Running Fedora 20 On Intel's Core i7 Haswell-E Platform
  2. A Tour Of The New Phoronix Office
  3. 7-Way Linux Desktop Gaming Comparison On Ubuntu 14.10
  4. Intel P-State vs. CPUFreq Benchmarks On The i7-5960X
Latest Linux News
  1. Linux 3.17 Has Basic Support For The Xbox One Controller
  2. openSUSE 13.2 Beta Still Using Btrfs By Default, & KDE Plasma 5 For Testing
  3. GTK+ 3.14 Brings Much Better Wayland Support, Multi-Touch, New Theme
  4. DisplayPort Comes To USB's Type-C Connector
  5. NSS Updated On Ubuntu 12.04/14.04 To Allow Netflix Support
  6. Linux 3.17-rc6 Released; Linux 3.17 Final Might Come In One Week
  7. X.Org Server 1.16.1 Released
  8. Mesa Gets Closer To Having OpenGL 4.0 Tessellation Support
  9. Uselessd: A Stripped Down Version Of Systemd
  10. F2FS Tools Gain FSCK Support
Latest Forum Discussions
  1. Uselessd: A Stripped Down Version Of Systemd
  2. NVIDIA GTX 770/780 -works ?
  3. Updated and Optimized Ubuntu Free Graphics Drivers
  4. State of Nouveau now and in the near future?
  5. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  6. Wasteland 2 Officially Launched Today, Including For Linux Gamers
  7. Trolling on the Phoronix forums
  8. New stress testing utility for GPU's