Newsgroups: comp.parallel
From: dean@cs.adelaide.edu.au (Dean Engelhardt)
Subject: CM5 Technical Report Available
Organization: University of Adelaide, South Australia.
Date: 16 Jun 1993 07:29:03 GMT


 For the last several months our research group has been involved in a series
of experiments to evaluate the relative performance characteristics of the
currently available CM5 programming paradigms. A major area of recent work has
been exploring the low-level programming of the CM5's vector hardware through
the assembly language DPEAC. This has largely involved a consideration of 
how efficient algorithms specific to the hardware configuration of the CM5 may
be designed and issues involved in implementing these algorithms.

 A technical report describing this recent work is now available for anonymous
ftp from ftp.cs.adelaide.edu.au in the directory pub/cm5reports as 
exper-cdpeac.ps.Z. The report is entitled "Experiences with CDPEAC: Vectorising
a Laplace Iteration" and has the following abstract:


                               Abstract

   We motivate and describe an algorithm we have designed to perform an 
   efficient Laplace iteration on the CM5 using a synchronous message 
   passing paradigm and programming the vector processing hardware directly. 
   Some notes on the implementation of the algorithm and some performance 
   statistics are included. These show our implementation to be more efficient
   than the equivalent program written with higher level paradigms like 
   CM Fortran.


 Also available from the same site and directory is an extended diagrammatic
example of the operation of the algorithm presented in the report. This example
appears as exper-example.ps.Z in the pub/cm5reports directory.


 Any comments concerning this work are naturally welcomed.


Dean.

Dean Engelhardt (dean@cs.adelaide.edu.au)
University of Adelaide
South Australia