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

Mobile Users Beware: Linux Has Major Power Regression

Michael Larabel

Published on 22 April 2011
Written by Michael Larabel
Page 3 of 4 - 100 Comments

As the Phoronix Test Suite was designed to be extremely extensible, the system monitoring module can also poll some other system vitals -- from the system I/O wait down to the CPU fan speeds and temperatures. Here is a look at some key facts between the Linux 2.6.37 and Linux 2.6.38 kernels when running the OpenArena game.

The CPU usage isn't vastly different between 2.6.37 and 2.6.38, so it's not that there's some user/kernel-space interaction problem resulting in a CPU load problem like before when another big regression was spotted (that time the regression was fixed before making its way into a released kernel, but this time it's already been around for one development cycle without being addressed).

Enhanced Intel SpeedStep Technology also is not broken. With the 2.6.38 kernel there is an increase in flipping between the two speed states on this Core Duo CPU, but it's not the entire time so it doesn't explain the increased power consumption for the entire duration or for the increased power usage when idling. A troubled EIST would also likely lead to different results in the tests themselves, which was not the case.

The GPU frequency was also unchanged between kernels. Again, I have reproduced this problem on mobile devices with Intel, NVIDIA, and ATI graphics adapters. The full monitoring results are available in this other OpenBenchmarking.org result file. There were also no changes in the display's screen brightness.

Latest Linux Hardware Reviews
  1. Even With Re-Clocking, Nouveau Remains Behind NVIDIA's Proprietary Linux Driver
  2. The Power Consumption & Efficiency Of Open-Source GPU Drivers
  3. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  4. Intel Pentium G3258 On Linux
Latest Linux Articles
  1. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  2. KVM Benchmarks On Ubuntu 14.10
  3. X.Org Server 1.16 Officially Released With Terrific Features
  4. Ubuntu With Linux 3.16 Smashes OS X 10.9.4 On The MacBook Air
Latest Linux News
  1. Grand Theft Auto Running On Direct3D Natively On Linux Shows Gallium3D Potential
  2. GCC As A Just-In Time Compiler Is An Interesting Project
  3. Age Of Wonders III Is Still Being Ported To Linux
  4. Git 2.1 To Further Mainline Windows Support Patches
  5. Debian 8.0 Jessie Is Settling For Linux 3.16
  6. Meson: A Next-Gen Build System Showing Promise
  7. Linux 3.16-rc7 Calms Things Down For The Linux 3.16 Kernel
  8. Open-Source AMD Users Report Hawaii GPU Acceleration Is Working
  9. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  10. Cauldron 2014: GCC & LLVM Will Look To Collaborate More
Latest Forum Discussions
  1. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Porting Mesa to the Playstation 2
  4. ASRock AM1H-ITX: One Of The Best AM1 Mini-ITX Motherboards
  5. Debian + radeonsi
  6. Open-source drivers on ATI R7 260X
  7. Table test
  8. How To Setup Radeon DPM On Ubuntu Linux