petsc-master 2020-09-23
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MatDenseCUDAPlaceArray

Allows one to replace the GPU array in a dense matrix with an array provided by the user. This is useful to avoid copying an array into a matrix

Synopsis

#include "petscmat.h"  
PetscErrorCode  MatDenseCUDAPlaceArray(Mat mat,const PetscScalar *array)
Not Collective

Input Parameters

mat - the matrix
array - the array in column major order

Notes

You can return to the original array with a call to MatDenseCUDAResetArray(). The user is responsible for freeing this array; it will not be freed when the matrix is destroyed. The array must have been allocated with cudaMalloc().

See Also

MatDenseCUDAGetArray(), MatDenseCUDAResetArray()

Level

developer

Location

src/mat/impls/dense/mpi/mpidense.c

Implementations

MatDenseCUDAPlaceArray_MPIDenseCUDA in src/mat/impls/dense/mpi/mpidense.c
MatDenseCUDAPlaceArray_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu

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