Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

Exploiting Prediction to Reduce Power on Buses

Victor Wen

EECS Department
University of California, Berkeley
Technical Report No. UCB/CSD-03-1294
November 2003

http://www.eecs.berkeley.edu/Pubs/TechRpts/2003/CSD-03-1294.pdf

We explore the possibility of reducing energy consumed by on-chip buses via stateful and stateless coding techniques. We explore the design of a number of simple coding schemes and simulate them using a modified SimpleScalar simulator and SPEC benchmarks. We show an average of 36% savings in transitions on internal buses such as the reorder buffer and register file. To quantify actual power savings, we design a simple dictionary based encoder/decoder circuit in a 0.13-micron process, extract it as a netlist, and simulate its behavior under SPICE. Utilizing a realistic wire model with repeaters, we show that we can break even at median length scales of less than 11.5mm at 0.13 microns and project a break-even point of 2.7mm for a larger design at 0.07 microns.


BibTeX citation:

@techreport{Wen:CSD-03-1294,
    Author = {Wen, Victor},
    Title = {Exploiting Prediction to Reduce Power on Buses},
    Institution = {EECS Department, University of California, Berkeley},
    Year = {2003},
    Month = {Nov},
    URL = {http://www.eecs.berkeley.edu/Pubs/TechRpts/2003/6365.html},
    Number = {UCB/CSD-03-1294},
    Abstract = {We explore the possibility of reducing energy consumed by on-chip buses via stateful and stateless coding techniques. We explore the design of a number of simple coding schemes and simulate them using a modified SimpleScalar simulator and SPEC benchmarks. We show an average of 36% savings in transitions on internal buses such as the reorder buffer and register file. To quantify actual power savings, we design a simple dictionary based encoder/decoder circuit in a 0.13-micron process, extract it as a netlist, and simulate its behavior under SPICE. Utilizing a realistic wire model with repeaters, we show that we can break even at median length scales of less than 11.5mm at 0.13 microns and project a break-even point of 2.7mm for a larger design at 0.07 microns.}
}

EndNote citation:

%0 Report
%A Wen, Victor
%T Exploiting Prediction to Reduce Power on Buses
%I EECS Department, University of California, Berkeley
%D 2003
%@ UCB/CSD-03-1294
%U http://www.eecs.berkeley.edu/Pubs/TechRpts/2003/6365.html
%F Wen:CSD-03-1294