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. A Walkthrough Of The New 32 System Open-Source Linux Benchmarking Test Farm
  2. Habey MITX-6771: Mini-ITX Board With Quad-Core J1900 Bay Trail
  3. OCZ Vector 150 SSD On Linux
  4. Noctua i4 CPU Cooler: Great For Cooling High-End LGA-2011v3 CPUs
Latest Linux Articles
  1. AMD Kaveri: Open-Source Radeon Gallium3D vs. Catalyst 14.12 Omega Driver
  2. 12-Way AMD Catalyst 14.12 vs. NVIDIA 346 Series Linux GPU Comparison
  3. AMD Catalyst 14.12 Omega Driver Brings Mixed Results For Linux Users
  4. 6-Way Winter 2014 Linux Distribution Comparison
Latest Linux News
  1. FSF's High Priority Project List Now Has A Committee
  2. Details On Using OpenACC & GPUs With GCC
  3. Ubuntu 15.04 Alpha 1 For Its Various Flavors
  4. Git 2.2.1 Released To Fix Critical Security Issue
  5. WTFTW: A Tiling Window Manager Written In Rust
  6. Jolla's Sailfish OS Update 10 Is Now Available
  7. HP To Launch Linux++ Operating System Next Year
  8. Civilization: Beyond Earth Launches For Linux
  9. NIR Has Been Revised As A New IR For Mesa
  10. New 64-bit Linux Kernel Vulnerabilities Disclosed This Week
Latest Forum Discussions
  1. XLennart: A Game For Systemd Haters With Nothing Better To Do
  2. The New SuperTuxKart Looks Better, But Can Cause GPU/Driver Problems
  3. Are there an app using HSA ?
  4. Debian init discussion in Phoenix Wright format
  5. Bench specific mount point
  6. Tool for measuring FPS in games
  7. Need some hand holding with upgrading xserver
  8. Ubuntu Developers Still Thinking What To Do About Adobe Flash Support