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

There's Another Linux Kernel Power Problem

Michael Larabel

Published on 9 December 2012
Written by Michael Larabel
Page 2 of 4 - 40 Comments

To begin with an easy test that fully maxes out all of the CPU cores during benchmarking, NASA's NAS Parallel Benchmarks was used while running the Embarrassingly Parallel test-case with the B data-set size (EP.B). As you can see, from the Linux 3.4 kernel to Linux 3.7 kernel there is no real change in performance out of this Intel Core i5 system.

While the performance remained unchanged, the line graph above clearly shows both the Linux 3.6 and 3.7 Git kernels burning through significantly more power than the earlier tested kernels. The newer kernels are going through roughly 20% more power than the earlier kernels when at their peak power consumption with all CPU cores being maxed.

With no change in the raw performance, the overall performance-per-Watt of Linux drops dramatically with Linux 3.6+ for this yet to be resolved problem.

Latest Linux Hardware Reviews
  1. Intel Launches The Core i7 5960X, Mighty Powerful Haswell-E CPUs
  2. AMD Radeon R9 290: Gallium3D vs. Catalyst Drivers
  3. AMD Radeon R9 290 Open-Source Driver Works, But Has A Ways To Go
  4. Trying The Configurable 45 Watt TDP With AMD's A10-7800 / A6-7400K
Latest Linux Articles
  1. The Fastest NVIDIA GPUs For Open-Source Nouveau With Steam Linux Gaming
  2. Testing For The Latest Linux Kernel Power Regression
  3. The Most Energy Efficient Radeon GPU For AMD Linux Gaming
  4. 20-Way Radeon Comparison With Open-Source Graphics For Steam On Linux Gaming
Latest Linux News
  1. Getting Involved With The New Raspberry Pi Graphics Driver
  2. A New AMD Catalyst Linux Driver Unofficially Surfaces
  3. LibreOffice Ported To 64-bit ARM (AArch64)
  4. Enlightenment E19 RC3 Shows Off The New Wayland Compositor
  5. Metro Redux Is Going To Require OpenGL 4.x On Linux
  6. Jailhouse v0.1 Released As A Basic Hypervisor For Linux
  7. Google's Chromebook "Samus" Now Supported By Coreboot
  8. Chrome 38 Now In Beta With Exciting Advancements
  9. Ubuntu's Utopic Unicorn 14.10 Beta 1 Released
  10. Genode OS 14.08 Has New GUI Architecture, Pluggable VFS
Latest Forum Discussions
  1. Catalyst 14.201.1008
  2. Btrfs Gets Talked Up, Googler Encourages You To Try Btrfs
  3. It's Now Possible To Play Netflix Natively On Linux Without Wine Plug-Ins
  4. Users defect to Linux as OpenBSD removes Lynx from base system
  5. Updated and Optimized Ubuntu Free Graphics Drivers
  6. Canonical Joined The Khronos Group To Help Mir/Wayland Drivers
  7. Radeon HD5670 and Ubuntu 14.04
  8. AMD Releases UVD Video Decode Support For R600 GPUs