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 Articles & Reviews
  1. Intel Broadwell HD Graphics 5500: Windows 8.1 vs. Linux
  2. Linux Benchmarks Of NVIDIA's Early 2015 GeForce Line-Up
  3. NVIDIA GeForce GTX 960: A Great $200 GPU For Linux Gamers
  4. Disk Encryption Tests On Fedora 21
  5. Xonotic 0.8 Performance With The Open-Source AMD/NVIDIA Gallium3D Drivers
  6. Many Linux Desktop 2D Benchmarks Of NVIDIA vs. AMD Drivers
Latest Linux News
  1. Linux Users Upset By Chromium's Busted HiDPI Support
  2. BPF Backend Merged Into LLVM To Make Use Of New Kernel Functionality
  3. Dying Light Is Headed To Linux, SteamOS
  4. Wayland 1.6.1 & Weston 1.6.1 Released
  5. Mesa 10.4.3 Brings A Bunch Of Fixes For The Direct3D "Nine" Support
  6. Intel Has A Few More Graphics Changes For The Linux 3.20 Kernel
  7. Gummiboot Gains PE File Searching Support To Find Linux Kernels
  8. Wine 1.7.35 Starts Working On OpenGL Core Context Support
  9. X.Org Server 1.17 Pre-Release "TimTam" Is Out
  10. Faster VP9 Decoding Is On The Horizon
Most Viewed News This Week
  1. Windows 10 To Be A Free Upgrade: What Linux Users Need To Know
  2. CoreOS Moves From Btrfs To EXT4 + OverlayFS
  3. Google Admin Encourages Trying Btrfs, Not ZFS On Linux
  4. TraceFS: The Newest Linux File-System
  5. Mozilla's Servo Still On Track For 2015 Alpha Release
  6. Fedora 23 Likely To Pursue Wayland By Default
  7. My Initial Intel Broadwell Linux Experience With The ThinkPad X1 Carbon
  8. Keith Packard Leaves Intel's Linux Graphics Work