[kepler-dev] PN + DDF

Norbert Podhorszki pnorbert at cs.ucdavis.edu
Mon Aug 21 10:25:51 PDT 2006


I am experiencing trouble with smooth co-operation of PN and DDF models in 
the current head of ptolemy.
Namely, a stream of tokens in a PN workflow simply disappears when diving 
into a DDF controlled subwf. See DDFtest.xml.

If I put the DDF composite within an SDF composite, then it works as 
expected. See DDFtest2.xml

My Kepler workflows definitely need DDF to handle branching combined with 
single-thread execution, so please, do not just say, DDF is 
experimental... They worked for several months but I realized this 
morning that this was because there was an SDF always between PN and DDF.

Many thanks
PS: I will consider SDF Case, I promise, but I have loops as well in DDF.


      Norbert Podhorszki
      University of California, Davis
      Department of Computer Science
      1 Shields Ave, 2236 Kemper Hall
      Davis, CA 95616
      (530) 754-8188
      pnorbert at cs.ucdavis.edu
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