Electrical Engineering
      and Computer Sciences

Electrical Engineering and Computer Sciences

COLLEGE OF ENGINEERING

UC Berkeley

Width Inference Documentation

Bert Rodiers and Ben Lickly

EECS Department
University of California, Berkeley
Technical Report No. UCB/EECS-2010-120
August 24, 2010

http://www.eecs.berkeley.edu/Pubs/TechRpts/2010/EECS-2010-120.pdf

In Ptolemy II actors are connected to each other with relations. A relation can consist of multiple channels, and we call the number of channels the width of the relation. Having to explicitly specify these widths is a tedious job. To make matters worse, the addition of one relation to a multiport might force the model builder to go through the entire model again to adapt widths. To cope with this the user can set the width parameter of a relation to be inferred, but the original implementation did not support inference across actors or over multiple levels of hierarchy. This paper describes the more general width inference algorithm now implemented in Ptolemy II. We cover the new features of the algorithm, optional settings for controlling optional consistency checks, and caveats for dealing with legacy models and default widths.


BibTeX citation:

@techreport{Rodiers:EECS-2010-120,
    Author = {Rodiers, Bert and Lickly, Ben},
    Title = {Width Inference Documentation},
    Institution = {EECS Department, University of California, Berkeley},
    Year = {2010},
    Month = {Aug},
    URL = {http://www.eecs.berkeley.edu/Pubs/TechRpts/2010/EECS-2010-120.html},
    Number = {UCB/EECS-2010-120},
    Abstract = {In Ptolemy II actors are connected to each other with relations. A relation can consist of multiple channels, and we call the number of channels the width of the relation.

Having to explicitly specify these widths is a tedious job. To make matters worse, the addition of one relation to a multiport might force the model builder to go through the entire model again to adapt widths.  To cope with this the user can set the width parameter of a relation to be inferred, but the original implementation did not support inference across actors or over multiple levels of hierarchy.

This paper describes the more general width inference algorithm now implemented in Ptolemy II.  We cover the new features of the algorithm, optional settings for controlling optional consistency checks, and caveats for dealing with legacy models and default widths.}
}

EndNote citation:

%0 Report
%A Rodiers, Bert
%A Lickly, Ben
%T Width Inference Documentation
%I EECS Department, University of California, Berkeley
%D 2010
%8 August 24
%@ UCB/EECS-2010-120
%U http://www.eecs.berkeley.edu/Pubs/TechRpts/2010/EECS-2010-120.html
%F Rodiers:EECS-2010-120