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

"Cryogenic" Linux Kernel Drops Power Use

Linux Kernel

Published on 19 March 2014 06:56 PM EDT
Written by Michael Larabel in Linux Kernel
8 Comments

Announced today was the "Cryogenic" module for the Linux kernel that claims to lower power consumption of Linux systems.

Alejandra Morales announced the Cryogenic Linux kernel module on the LKML today. Cryogenic aims to reduce system power consumption by "enabling cooperative clustering of I/O operations among the various applications that make use of the same hardware device. In order to achieve this target, Cryogenic provides an API that enables applications to schedule I/O operations on SCSI and network devices at times where the impact the operations have on energy consumption is small."

Essentially this "Cryogenic" module isn't some magic piece of software that by just being loaded will reduce Linux power usage but requires other pieces of software to take advantage of its exposed API. The Cryogenic API allows deferring non-urgent tasks so they will happen at the same time as I/O operations requested by urgent tasks. In effect, the devices will be able to sleep longer as they won't be woken up until there's a lot of operations pending and/or urgent operations to be committed. With the hardware sleeping longer, it leads to power savings, especially for modern hardware that has very low-power sleep states.

"Cryogenic" Linux Kernel Drops Power Use


Cryogenic was developed as a Master's Thesis at the Technical University of Munich by Alejandra Morales. This student is willing to offer the Cryogenic work for the mainline Linux kernel if there's interest in adapting the code and taking advantage of this potential power-savings API. More details and the Cryogenic code can be found via the kernel mailing list. There's also other Linux Cryogenic project information via the GNUnet.org project site.

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. Even With Re-Clocking, Nouveau Remains Behind NVIDIA's Proprietary Linux Driver
  2. The Power Consumption & Efficiency Of Open-Source GPU Drivers
  3. AMD R600g/RadeonSI Performance On Linux 3.16 With Mesa 10.3-devel
  4. Intel Pentium G3258 On Linux
Latest Linux Articles
  1. Nouveau vs. Radeon vs. Intel Tests On Linux 3.16, Mesa 10.3-devel
  2. KVM Benchmarks On Ubuntu 14.10
  3. X.Org Server 1.16 Officially Released With Terrific Features
  4. Ubuntu With Linux 3.16 Smashes OS X 10.9.4 On The MacBook Air
Latest Linux News
  1. Grand Theft Auto Running On Direct3D Natively On Linux Shows Gallium3D Potential
  2. GCC As A Just-In Time Compiler Is An Interesting Project
  3. Age Of Wonders III Is Still Being Ported To Linux
  4. Git 2.1 To Further Mainline Windows Support Patches
  5. Debian 8.0 Jessie Is Settling For Linux 3.16
  6. Meson: A Next-Gen Build System Showing Promise
  7. Linux 3.16-rc7 Calms Things Down For The Linux 3.16 Kernel
  8. Open-Source AMD Users Report Hawaii GPU Acceleration Is Working
  9. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  10. Cauldron 2014: GCC & LLVM Will Look To Collaborate More
Latest Forum Discussions
  1. Linus Torvalds On GCC 4.9: Pure & Utter Crap
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Porting Mesa to the Playstation 2
  4. ASRock AM1H-ITX: One Of The Best AM1 Mini-ITX Motherboards
  5. Debian + radeonsi
  6. Open-source drivers on ATI R7 260X
  7. Table test
  8. How To Setup Radeon DPM On Ubuntu Linux