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sharing matrix in parfor

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Eugene
Eugene 2012-6-30
I have a program which uses the parfor loop and contains a large matrix (2-3GB). Each worker continuously access random locations in the matrix, but never write to the matrix. When using parfor the matrix is copied for each worker causing a massive memory spike. Is there a way to prevent this and allow each worker to read from the same matrix?

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Sarah Wait Zaranek
Sarah Wait Zaranek 2012-9-14
There is no way to do shared memory automatically in a parfor loop. However, depending on where the data is located - there may be options. For instance, if the data is coming from a file - memory mapping may work well. Look at the function memmapfile.

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