Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

Software Strategies for Portable Computer Energy Management

Jacob R. Lorch and Alan Jay Smith

EECS Department
University of California, Berkeley
Technical Report No. UCB/CSD-97-949
May 1997

http://www.eecs.berkeley.edu/Pubs/TechRpts/1997/CSD-97-949.pdf

Limiting the energy consumption of computers, especially portables, is becoming increasingly important. Thus, new energy-saving computer components and architectures have been and continue to be developed. Many architectural features have both high performance and low power modes, with the mode selection under software control. The problem is to minimize energy consumption while not significantly impacting the effective performance. We group the software control issues as follows: transition, load-change, and adaptation. The transition problem is deciding when to switch to low-power, reduced-functionality modes. The load-change problem is determining how to modify the load on a component so that it can make further use of its low-power modes. The adaptation problem is how to create software that allows components to be used in novel, power-saving ways. We survey implemented and proposed solutions to software energy management issues created by existing and suggested hardware innovations.


BibTeX citation:

@techreport{Lorch:CSD-97-949,
    Author = {Lorch, Jacob R. and Smith, Alan Jay},
    Title = {Software Strategies for Portable Computer Energy Management},
    Institution = {EECS Department, University of California, Berkeley},
    Year = {1997},
    Month = {May},
    URL = {http://www.eecs.berkeley.edu/Pubs/TechRpts/1997/5503.html},
    Number = {UCB/CSD-97-949},
    Abstract = {Limiting the energy consumption of computers, especially portables, is becoming increasingly important. Thus, new energy-saving computer components and architectures have been and continue to be developed. Many architectural features have both high performance and low power modes, with the mode selection under software control. The problem is to minimize energy consumption while not significantly impacting the effective performance. We group the software control issues as follows: transition, load-change, and adaptation. The transition problem is deciding when to switch to low-power, reduced-functionality modes. The load-change problem is determining how to modify the load on a component so that it can make further use of its low-power modes. The adaptation problem is how to create software that allows components to be used in novel, power-saving ways. We survey implemented and proposed solutions to software energy management issues created by existing and suggested hardware innovations.}
}

EndNote citation:

%0 Report
%A Lorch, Jacob R.
%A Smith, Alan Jay
%T Software Strategies for Portable Computer Energy Management
%I EECS Department, University of California, Berkeley
%D 1997
%@ UCB/CSD-97-949
%U http://www.eecs.berkeley.edu/Pubs/TechRpts/1997/5503.html
%F Lorch:CSD-97-949