how to parallelize separate matrix-matrix multiplications?

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Yang 2018-1-25

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评论： Yang 2018-1-26

There are three matrix-matrix multiplications: C1=A1*B1, C2=A2*B2, C3=A3*B3.

If I wrote the code like above, the three matrix-matrix multiplications will be calculated in a sequential way. Is there an easy way to parallelize the three matrix-matrix multiplications (apart from using parfor)?

Apology if this question has been raised&answered before. I didn't find such a question after some quick search.

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Answer 1

Brendan Hamm 2018-1-25

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编辑：Brendan Hamm 2018-1-25

Unless you are working on a cluster, I would not expect to see any speed up from parallelizing such operations. The reason for this is that a matrix multiplication is multi-threaded, meaning that each of these computations is already utilizing multiple cores on your machine.

If you are working on a cluster, you can assign each of these variables in an SPMD block and perform the computation on each machine separately.

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Brendan Hamm 2018-1-25

This is a good point and useful for others who might happen upon this question, as according to Yang, there may not be similar posts. I was considering his question alone, but this is a better generalization of the concept.

Also, I edited the work hyper-threaded to multi-threaded, so as not to be hardware specific.

Yang 2018-1-26