Performs matrix-matrix multiplication C=A*B.
Neighbor-wise Collective on A
C - the product matrix
Unless scall is
MAT_REUSE_MATRIX C will be created.
To determine the correct fill value, run with -info and search for the string “Fill ratio” to see the value actually needed.
In the special case where matrix B (and hence C) are dense you can create the correctly sized matrix C yourself and then call this routine with
rather than first having
MatMatMult() create it for you. You can NEVER do this if the matrix C is sparse.
Example of Usage#