Re: [OMPI users] Big improvements in derived datatype performance on 1.2

[Doug Gregor]

Hi George,

On Dec 15, 2006, at 4:05 PM, George Bosilca wrote:

Thanks for the graph. I was wondering how do we compare with the
others MPI implementations. If you have others MPI installed on your
cluster can you do the same measurements with them and augment your
graph with the results ?

I hope that helps.

        Cheers,
        Doug

Here's a graph with Open MPI 1.2, MVAPICH2 0.9.8, and LAM/MPI 7.1.2. It looks like derived datatypes don't have any real cost in this case on any of these implementations. Open MPI 1.1 was *much* slower with derived datatypes than with primitive/built-in data types, but I ran out of space to show that here.

netpipe-ompi.pdf
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