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

Making A Code Compiler Energy-Aware

Compiler

Published on 16 April 2013 11:28 AM EDT
Written by Michael Larabel in Compiler
30 Comments

There's a discussion on the LLVM development mailing list about making the compiler become energy-aware to provide an optimization level that would provide the most power-efficient binaries. However, it isn't clear whether this would make sense over simply trying to assemble the fastest binary.

While an "-Oe" optimization level that would optimize for energy-efficient performance over the optimization levels for performance, debugability, or binary size, it wouldn't necessarily entail much and hasn't gained the interest of core upstream compiler developers. For commodity hardware, most compiler research indicates that the most energy-efficient binary is simply the fastest. The faster the work finishes, the quicker the processor can drop to one of its low-power states.

Three years ago there was a -Oe optimization proposal, which ended up getting quickly marked as invalid with LLVM's founder, Chris Lattner, reaffirming "faster = lower power" on mainstream CPUs.

While this older bug report was pointed out in the discussion, some have brought up possibilities of ways to lower memory use in an energy-efficient mode since on some hardware (especially ARM SoCs), RAM use can be a power-hungry operation over simply re-generating the values, among other approaches.

In this discussion, it was brought up that some researchers are working on some energy-efficiency improvements as part of the ENTRA Project. ENTRA is a three-year research project (October 2012 - 2015) funded by the European Union to promote energy-aware software development through "advanced program analysis and modelling of energy consumption" within systems. No fruits of this work have yet to be produced.

Those wishing to read the full mailing list discussion can do so beginning with this message.

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 Linux Hardware Reviews
  1. NVIDIA GeForce GTX 980: The Best GPU For Linux Gamers
  2. ROCCAT LUA: A Linux-Friendly Gaming Mouse
  3. Cheetah Mounts: The Affordable Way To Put Your TV On The Wall
  4. Scythe Mugen MAX
Latest Linux Articles
  1. Preview: Radeon Gallium3D Performance For CS:GO On Linux
  2. XWayland Linux Gaming Performance With GNOME Wayland On Fedora 21
  3. EXT4/Btrfs/XFS/F2FS Benchmarks On Linux 3.17
  4. Fedora 21 Alpha First Impressions: It's Great
Latest Linux News
  1. Microsoft Announces... Windows 10 With A Start Menu
  2. Borderlands 2 Launches On Steam For Linux
  3. Debian Jessie Might Get Rid Of The kFreeBSD Port
  4. Fedora Might Try A New Scheduling Strategy For Its Releases
  5. AMD's Catalyst Working On A GLSL Shader Cache
  6. OpenMP 4.0 Offloading Is Closer For GCC 5
  7. Wayland Presentation Extension Added To Weston
  8. Intel Skylake Support Rolls Out To Mesa's DRM
  9. VA-API's Libva 1.4.0 Brings VP8 Encoding Support
  10. Operating System U Fails To Live Up To Its Goals
Latest Forum Discussions
  1. FSF Issues Statement On Shellshock Bash Vulnerability
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. X.Org Women Outreach Program Only Turns Up Two Applicants So Far
  4. Advertisements On Phoronix
  5. NVIDIA Alerts Nouveau: They're Starting To Sign/Validate GPU Firmware Images
  6. New AMD Catalyst drivers out today
  7. Take the Steam Survey results with a grain of salt. It is flawed.
  8. AMD Wants To Know What's Wrong With Catalyst