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

Ubuntu's Power Consumption Tested

Michael Larabel

Published on 14 October 2007
Written by Michael Larabel
Page 1 of 4 - 16 Comments

Ubuntu 7.10 "Gutsy Gibbon" is due out in just a few days and shipping with it is the Linux 2.6.22 kernel. One of the interesting additions to the Linux kernel since the 2.6.20-based Ubuntu 7.04 "Feisty Fawn" release has been the tickless kernel feature. If you hadn't read out tickless kernel article from earlier this year, the tickless kernel feature (CONFIG_NO_HZ) is designed to improve the power efficiency especially on servers and portable devices. This CONFIG_NO_HZ feature works by enabling on-demand timer interrupts that allow a system to idle for a longer period of time and avoiding useless interrupts. This is not only designed to reduce power consumption but to allow for the system to run cooler and an extended battery-life for mobile devices.

For this article we've decided to not only deliver power benchmarks from Ubuntu 7.10 and Ubuntu 7.04 to compare the tickless kernel effect, but we have went back and retested all of the Ubuntu releases going back to Ubuntu 5.04, or also known as Hoary Hedgehog. With the past six Ubuntu releases we had tested the power consumption of a Lenovo laptop when running from its AC charger and off the battery, when the system was idling and then again under load. We had also monitored the temperature of the Intel Centrino mobile processor. You may be surprised by the results of Ubuntu's power usage.

The laptop used to conduct all of these tests was a Lenovo ThinkPad R52. This ThinkPad R52 was equipped with an Intel Pentium M 750 (1.86GHz with Enhanced Intel SpeedStep Technology), 2GB of DDR2-533 system memory, ATI Radeon X300 64MB GPU, 15.4" 1400 x 1050 display, Intel 802.11g WiFi, and an 80GB IDE hard drive. Due to compatibility problems with the first Ubuntu release, Ubuntu 4.10 "Warty Warthog", we were unable to test its power consumption on the Lenovo R52. However, this laptop had no problems with Ubuntu 5.04 "Hoary Hedgehog", Ubuntu 5.10 "Breezy Badger", Ubuntu 6.06.1 LTS "Dapper Drake", Ubuntu 6.10 "Edgy Eft", Ubuntu 7.04 "Feisty Fawn", and the Ubuntu 7.10 "Gutsy Gibbon". While the final release of Ubuntu 7.10 isn't out yet, we had used a daily LiveCD build from early October.

When testing the Lenovo ThinkPad R52 with the power consumption from the AC adapter we had used a SeaSonic PowerAngel to monitor the Wattage. The battery discharge rate and CPU temperature were both obtained through the Linux IBM ACPI driver. During our idling tests, the notebook was simply running within the Ubuntu GNOME environment using the stock settings, but while the screensaver was not active. Both the idle and load results were recorded after 15 minutes when their power consumption had leveled off. The load tests consisted of running glxgears and CPU Burn-In to stress the CPU. We hadn't run Intel's PowerTOP due to issues with the older Ubuntu releases.

To recap the past Ubuntu releases, Ubuntu 5.04 had shipped with X.Org 6.8.2 and the Linux 2.6.10 kernel, Ubuntu 5.10 with Linux 2.6.12-9 and X.Org 6.8.2, Ubuntu 6.06.1 with X.Org 7.0.0 and Linux 2.6.15-26, Ubuntu 6.10 with X.Org 7.1.1 and the 2.6.17-10 kernel, Ubuntu 7.04 with the 2.6.20-15 kernel and X.Org 7.2.0, and Ubuntu 7.10 with the 2.6.22-12 kernel and X.Org 7.2 / X server 1.3.

<< Previous Page
1
Latest Linux Hardware Reviews
  1. NVIDIA GeForce GTX 970 Offers Great Linux Performance
  2. CompuLab Intense-PC2: An Excellent, Fanless, Mini PC Powered By Intel's i7 Haswell
  3. From The Atom 330 To Haswell ULT: Intel Linux Performance Benchmarks
  4. AMD Radeon R9 285 Tonga Performance On Linux
Latest Linux Articles
  1. Btrfs RAID HDD Testing On Ubuntu Linux 14.10
  2. Ubuntu 14.10 Linux 32-bit vs. 64-bit Performance
  3. AMD Moves Forward With Unified Linux Driver Strategy, New Kernel Driver
  4. MSI: Update Your BIOS From The Linux Desktop
Latest Linux News
  1. Nouveau Now Supports DRI3 Without GLAMOR
  2. Features Of The Linux 3.18 Kernel
  3. Debian Now Defaults To Xfce On Non-x86 Desktops
  4. Phoenix Is Trying To Be An Open Version Of Apple's Swift
  5. Linux 3.19 To Have Skylake Graphics, PPGTT Enablement
  6. Ubuntu 16.04 Might Be The Distribution's Last 32-Bit Release
  7. Imagination Releases Full ISA Documentation For PowerVR Rogue GPUs
  8. Features GNOME Developers Want In The Linux Kernel
  9. GTK+ Gains Experimental Overlay Scrollbars
  10. Phoronix Test Suite 5.4 M3 Is Another Hearty Update
Latest Forum Discussions
  1. Users/Developers Threatening Fork Of Debian GNU/Linux
  2. AMD Releases UVD Video Decode Support For R600 GPUs
  3. HOPE: The Ease Of Python With The Speed Of C++
  4. Proof that strlcpy is un-needed
  5. xbox one tv tuner
  6. Bye bye BSD, Hello Linux: A Sys Admin's Story
  7. Updated and Optimized Ubuntu Free Graphics Drivers
  8. NVIDIA Presents Its Driver Plans To Support Mir/Wayland & KMS On Linux