1996 Research Summaries for the Ptolemy Project
Ptolemy C Code Generation and Scheduling for the Network of Workstations (NOW)
| Researchers: | Farhana Sheikh and Patrick Warner
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| Advisor: | Edward A. Lee
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| Sponsors: | Canadian NSERC 1967 Scholarship, National Consortium for Graduate Degrees for Minorities in Engineering and Science (GEM) and the Ptolemy Project |
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Ptolemy is a flexible foundation upon which to build simulation and prototyping
environments. In order to examine the uses of Ptolemy in broader parallel and
networking problems, a Network of Workstations (NOW) target for the Ptolemy Co
de
Generation in C (CGC) domain provides a valuable platform. A NOW target is
implemented using existing Ptolemy CGC stars (elemental functions) and
schedulers, with the addition of NOW active messages for multiprocessor
communication. Using the NOW active message interface allows for the NOW CGC
target to remain unchanged, as it takes advantage of improvements in the
underlying active message implementation. This project implements a NOW target
for Ptolemy's CGC domain and explores issues in partitioning an algorithm to
individual tasks that can be scheduled for parallel execution on a NOW.
The active message implementation is currently based on TCP/IP.
This has the advantage of being able to run NOW target simulations
on a TCP/IP network, but has the disadvantage of poor performance due to
TCP/IP overhead. Future work on the project will include use of Lanai
active messages which run on SBUS based Lanai Boards from Myricom.
Send comments to Farhana Sheikh at farhana@eecs.berkeley.edu.