4,580 Posts served
11,094 Conversations started
- Academic
- Android
- Art, Music, & Animation
- Embedded Computing
- Events
- Game Development
- Graphics & Media
- Intel SW Partner Program
- Intel® AppUp Developer Program
- Manageability & Security
- Mobility
- Open Source
- Parallel Programming
- Performance and Optimization
- Power Efficiency
- Server
- Site News & Announcements
- Software Tools
- Ultrabook
- Association for Computing Machinery TechNews (ACM)
- Go Parallel! (Dr. Dobbs)
- HPCwire (Tabor Communications, Inc.)
- insideHPC (John West)
- Joe Duffy's Weblog (Microsoft)
- Microsoft Parallel Programming Development Center (Microsoft Germany)
- MultiCoreInfo.com
- scalability.org (Scalable Informatics)
- Software Dev Blog (Intel Germany)
- Soft Talk Blog (Intel United Kingdom)
- The Moth (Microsoft)
Optimizing Software Applications for Power: Part 1 (of 13)
By David Ott (Intel) (34 posts) on November 29, 2010 at 11:04 am
Part 1: Power Management Basics
Because of the need to integrate hardware features with software management, today’s computer system power management framework is defined by an open industry specification known as ACPI. ACPI, or the Advanced Configuration and Power Interface specification[1], is an operating system-based scheme for managing system power features and is intended to replace the familiar BIOS-based scheme known as APM (Advanced Power Management).
ACPI is a comprehensive solution that discusses both hardware and software aspects of computer system power management, and how they should interact with one another. You can find the 4.0a specification at:
http://www.acpi.info/spec.htm
Note the diagram on page 24 of the introduction entitled "OSPM/ACPI Global System". It does a nice job of providing an overview of the system components involved and how they interact with one another.
(Quote from the link above: "The Advanced Configuration and Power Interface Specification, Revision 4.0a describes the structures and mechanisms necessary to design operating system-directed power management and make advanced configuration architectures possible. ACPI applies to all classes of computers. If you want to design and build an ACPI-compatible system, you need the ACPI Specification.")
References:
[1] Advanced Configuration and Power Interface Specification, Revision 4.0a, April 5, 2010.
Categories: Power Efficiency
For more complete information about compiler optimizations, see our Optimization Notice.
Comments (1)
Trackbacks (2)
-
Twitter Trackbacks for
Optimizing Software Applications for Power: Part 1 (of 13) – Intel Software Network Blogs
[intel.com]
on Topsy.com
November 29, 2010 10:39 PM PST - Optimizing Software Applications for Power: Part 1 (of 13)
November 30, 2010 4:43 AM PST
Clay Breshears (Intel)
30,566
The diagram David mentions is Figure 1-1 on page 5 (41 of 958 in the PDF document) in the 5.0 document.