[comp.parallel] Request for IPSC applications or benchmarks

segall@caip.rutgers.edu (Ed Segall) (09/12/90)

	Request for IPSC applications/benchmarks


Hello, 

I am doing some development work in Linda on an IPSC/2.  In order to
objectively evaluate the performance of programs I write, I need to
compare them with programs that are generally accepted to have good
performance on this machine.

Does anyone out there have a program that performs well (not
necessarily outstandingly) for its application area and for this
machine?  If it's not too large, I would like to rewrite it in Linda
and compare performance.  I need either source code that I can compile
(this is preferable, so that I can make sure I'm comparing apples to
apples), or performance information along with an algorithm, with
enough information that I can reproduce the algorithm in Linda and
extrapolate the performance results to whatever machine configuation I
run it on.

Lacking either of the above, I would appreciate at least minimal
information, such as "We achieved XXX MFLOPS on a 32 processor machine
without vector units, doing Gaussian Elimination with partial
pivoting", so that I can at least make a meaningful comparison with
something I write.


Thank you,


Edward Segall
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Didier.Badouel@irisa.fr (09/13/90)

>
>	Request for IPSC applications/benchmarks
>

I think our Public Domain raytracing algorithm (VM_pRAY) may have some 
interest for you. It runs on an iPSC/2 and is based on a distributed virtual 
memory for the database (which can be particularly large for this 
algorithm). I think I you want to rewrite the code in Linda you can do it
with minor changes: parallel code is limited for two services, one service 
for the shared database accesses (using software paging mechanism) and one 
service for the work balance (dynamic distribution of the pixel map).

The source code of VM_pRAY is available from our site 
(irisa.irisa.fr (131.254.2.3)) with a ftp anonymous access 
(directory iPSC2/VM_pRAY). 

-didier.

--
Didier Badouel @ IRISA, Rennes, France      (badouel@irisa.fr)
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