split_factor_estimate Function

private function split_factor_estimate(max_mm_dim, nze_a, nze_b, nze_c, numnodes) result(nsplit)

Estimate optimal split factor for AxB=C from occupancies (number of non-zero elements) This estimate is based on the minimization of communication volume whereby the communication of CARMA n-split step and CANNON-multiplication of submatrices are considered. \result estimated split factor

Arguments

Type	Intent	Optional	Attributes		Name
integer,	intent(in)			::	max_mm_dim
integer(kind=int_8),	intent(in)			::	nze_a	number of non-zeroes in A number of non-zeroes in B number of non-zeroes in C
integer(kind=int_8),	intent(in)			::	nze_b	number of non-zeroes in A number of non-zeroes in B number of non-zeroes in C
integer(kind=int_8),	intent(in)			::	nze_c	number of non-zeroes in A number of non-zeroes in B number of non-zeroes in C
integer,	intent(in)			::	numnodes	number of MPI ranks

Return Value integer