MatCUSPARSESetUseCPUSolve#

Sets to use CPU MatSolve().

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatCUSPARSESetUseCPUSolve(Mat A, PetscBool use_cpu)

Input Parameters#

A - Matrix of type MATSEQAIJCUSPARSE
use_cpu - set flag for using the built-in CPU MatSolve()

Note#

The cuSparse LU solver currently computes the factors with the built-in CPU method and moves the factors to the GPU for the solve. We have observed better performance keeping the data on the CPU and computing the solve there. This method to specify if the solve is done on the CPU or GPU (GPU is the default).