🚀 go-pugleaf

>Since many of those sites included [not very interesting] peak MFLOPS
>ratings for Intel Paragon and TMC CM-5 machines, but Dongarra's latest
>[January 13, 1993] Linpack report STILL has no Linpack numbers for the
>Paragons and CM-5s (even in Table 3, where one can make the matrices
>as large as they wish!), would some owner of these machines please
>give us the Linpack results for those two systems?

I haven't tried linpack itself but I have coded some vector and matrix
routines. On a CM-5 with vector units I have achieved 75MFlops per node
for vector*matrix, matrix*vector and matrix*matrix routines. I have
achieved 45MFlops for an outer product of two vectors. These are all for
double precision numbers. I believe the quoted peak performance is
128MFlops per node. I am not a experienced CM5 programmer (these were my
first vector unit routines) and expect that much better results could be
obtained by someone with more experience. In particular I suspect that
the pipelining of instructions could give me a big improvement.

I coded these routines in CDPEAC and tested with vector lengths of
around 100 and matrices of approx 100*100. 

On a related issue - has anyone got any code to copy data from scalar
memory to the DP stack or heap on the CM5 at better than 16Mb per
second? I really need to copy data much faster than that.  This is
really only an issue if you are programming using the CMMD message
passing library. 


Andrew


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Andrew Tridgell                 CSLab, Research School of Physical Sciences
Andrew.Tridgell@anu.edu.au      Australian National University (x3064)
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