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

Intel Linux Driver Trying Bay Trail Aggressive Downclocking

Intel

Published on 03 July 2014 03:11 PM EDT
Written by Michael Larabel in Intel
5 Comments

Intel's Linux open-source crew is toying with aggressive down-clocking for current-generation Bay Trail hardware for greater power-savings and lower heat output.

Chris Wilson of Intel OTC has proposed a patch to be more aggressive about down-clocking -- dropping the Atom/Celeron SoCs to their lower frequency/power states more quickly after being in a ramped-up state. Assuming the workload has finished, this should yield a quicker return to the lowest power state for maximum power-savings / longest battery life and lower heat output.

Chris explained with the DRM driver patch, "Baytrail uses the RPS wait-boosting mechanism of Sandybridge+ but also has a very lax downclocking strategy (upclock if more than 90% busy over 76ms, downclock if less than 70% busy over 450ms). This causes Baytrail to use maximum clocks, and for them to stay high, when doing simple tasks such as scrolling through webpages. However, we can take a leaf out of the same wait-boost mechansim and apply the aggressive downclocking strategy from Sandybridge+ as well."

Of course, if the driver down-clocking is too aggressive, this could cause performance issues, which is now being discussed in the aforelinked driver thread. Hopefully the results will pan out (and we will test it ourselves once merged) and hopefully this will provide Bay Trail Linux users with some benefits.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Articles & Reviews
  1. Khronos Group Announces Vulkan, OpenCL 2.1, SPIR-V
  2. Samsung 850 EVO SSD Linux Benchmarks
  3. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  4. 5-Way Linux Distribution Comparison On The Core i3 NUC
  5. OCZ ARC 100 Linux SSD Benchmarks
  6. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
Latest Linux News
  1. QuIC Continues Contributing To Open-Source MDP DRM/KMS Driver
  2. Reported Steam Linux Usage Battles To Stay Above 1.0%
  3. Benchmarks Of The $129 8-Core 64-bit ARM Development Board
  4. Wine 1.7.38 Supports Themed Scrollbars, Updated Mono Engine
  5. Siemens Commits New Motherboard Support To Coreboot
  6. Nuntius: Delivering Android Notifications To The GNOME Desktop
  7. The Khronos Group's Vulkan, SPIR-V & OpenCL 2.1 Presentations
  8. Valve Developed An Intel Linux Vulkan GPU Driver
  9. Valve Starts Listing The Steam Machines In The Steam Store
  10. Ubuntu Will Start Booting With Systemd Next Monday
Most Viewed News This Week
  1. Confirmed: Vulkan Is The Next-Gen Graphics API
  2. Xfce 4.12 Released After Nearly Three Years Of Work
  3. 8cc: A Small C11 Compiler
  4. Unreal Engine Made Free By Epic Games
  5. Canonical's Latest Demo Of Ubuntu Unity 8 Convergence In Action
  6. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
  7. VLC 2.2 "Weathermax" Brings Better VP9 & H.265 Support
  8. Features Coming For The Imminent Xfce 4.12 Release