MatHIPSPARSESetUseCPUSolve — PETSc 3.22.5 documentation

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# MatHIPSPARSESetUseCPUSolve

Sets use CPU `MatSolve()`.

## Synopsis

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

## Input Parameters

- A - Matrix of type `MATSEQAIJHIPSPARSE`

- use_cpu - set flag for using the built-in CPU `MatSolve()`

## Notes

The hipSparse 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 specifies if the solve is done on the CPU or GPU (GPU is the default).

## See Also

Matrices, `Mat`, `MatSolve()`, `MATSEQAIJHIPSPARSE`, `MatHIPSPARSEStorageFormat`, `MatHIPSPARSEFormatOperation`

## Level

intermediate

## Location

src/mat/impls/aij/seq/seqhipsparse/aijhipsparse.hip.cpp

## Implementations

MatHIPSPARSESetUseCPUSolve_SeqAIJHIPSPARSE() in src/mat/impls/aij/seq/seqhipsparse/aijhipsparse.hip.c

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