MatDenseCUDAGetArrayRead#

Provides read-only access to the CUDA buffer inside a MATDENSECUDA matrix. The array must be restored with MatDenseCUDARestoreArrayRead() when no longer needed.

Synopsis#

#include "petscmat.h"  
PetscErrorCode MatDenseCUDAGetArrayRead(Mat A, const PetscScalar **a)

Not Collective

Input Parameters#

  • A - the matrix

Output Parameters

  • array - the GPU array in column major order

Note#

Data can be copied to the GPU due to operations done on the CPU. If you need write only access, use MatDenseCUDAGetArrayWrite().

See Also#

MATDENSECUDA, MatDenseCUDAGetArray(), MatDenseCUDARestoreArray(), MatDenseCUDARestoreArrayWrite(), MatDenseCUDAGetArrayWrite(), MatDenseCUDARestoreArrayRead()

Level#

developer

Location#

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

Implementations#

MatDenseCUDAGetArrayRead_MPIDenseCUDA in src/mat/impls/dense/mpi/mpidense.c
MatDenseCUDAGetArrayRead_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu


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