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. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  2. Intel 120GB 530 Series SSD Linux Performance
  3. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
  4. AMD's Windows Catalyst Driver Remains Largely Faster Than Linux Drivers
Latest Linux Articles
  1. Apple OS X 10.10 vs. Ubuntu 14.10 Performance
  2. Mesa 10.5-devel Brings Some Intel Haswell HD Graphics Changes Over Mesa 10.3
  3. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  4. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
Latest Linux News
  1. GCW Zero Starts Seeing New Game Releases
  2. Intel's Cherry Trail Delayed To Next Year
  3. Bq Introduces More Android Devices, But Still No Ubuntu Phones
  4. Qt 5.4 Release Candidate Expected Later This Week
  5. ArrayFire Accelerated Compute Library Open-Sourced
  6. Amazon's Fire TV Stick: A Nice, Affordable Media Center Option
  7. Google Puts Chrome NPAPI Support On Final Countdown
  8. There's New In-Fighting Over The Future Of Compiz
  9. GTK+ Inspector Gains More Features Ahead Of GNOME 3.16
  10. Clang 3.6 Will Hopefully Have OpenMP Support
Latest Forum Discussions
  1. Hurrican SDL Port
  2. Roadmap to Catalyst 14.10 ?
  3. how to configure module phoromatic ?
  4. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  5. Debian Developer Resigns From The Systemd Maintainership Team
  6. Updated and Optimized Ubuntu Free Graphics Drivers
  7. Cant get working Kaveri APU - A10-7850k
  8. Script for Fan Speed Control