pdgemm_ algorithm

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pdgemm_ algorithm

Postby mvairavan » Mon Dec 09, 2013 1:30 am

I have been using pdgemm_ scalapack function call for matrix multiplication. I am using square matrix and a square grid of processors.
And figured out that its calling PB_CpgemmAB function call, which says its "outer-product algorithm using the logical LCM hybrid algorithmic blocking technique".
Can anyone tell me whats the algorithm used in this call. Is it SUMMA or DIMMA ??

Thanks.
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Re: pdgemm_ algorithm

Postby admin » Sat Jan 11, 2014 2:09 pm

PBLAS matrix multiplication (included in ScaLAPACK library) is based on the SUMMA algorithm.
Hope it helps
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