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 Articles & Reviews
  1. Samsung 850 EVO SSD Linux Benchmarks
  2. Kubuntu 15.04 Is Turning Out Quite Nice, Good Way To Try Out The Latest KDE
  3. 5-Way Linux Distribution Comparison On The Core i3 NUC
  4. OCZ ARC 100 Linux SSD Benchmarks
  5. Lenovo ThinkPad X1 Carbon Works Great As A Linux Ultrabook
  6. Transcend SSD370 256GB
Latest Linux News
  1. Kdenlive Ported To Qt5/KF5, Coming To KDE Applications 15.04
  2. HTC & Valve Partnered Up For The Steam VR Headset
  3. 8cc: A Small C11 Compiler
  4. Not Everyone Likes The Possible "VULKAN" Name For Next-Gen OpenGL
  5. The Binary Blobs Making Up Coreboot
  6. Linux 4.0 & LLVM vs. GCC Yielded Much Interest This Month
  7. XBMC/Kodi 15.0 Alpha 1 Released
  8. Xfce 4.12 Released After Nearly Three Years Of Work
  9. The Khronos Group Filed A Trademark On "Vulkan" API
  10. Mozilla Thunderbird Adoption Climbs, Thunderbird 38 In May
Most Viewed News This Week
  1. Screenshots Of The GNOME 3.16 Changes
  2. More Proof That Allwinner Is Violating The GPL
  3. The Tremendous Features Of Fedora 22
  4. Krita 2.9 Released, Their Biggest Release Ever
  5. A Single UEFI Executable With The Linux Kernel, Initrd & Command Line
  6. Linux 4.0 Doesn't Have The Weirdest Codename
  7. Canonical Comes Up With Its Own FUSE Filesystem For Linux Containers
  8. Firefox 36 Brings Full HTTP/2 Support
%%CLICK_URL_UNESC%%