MatDenseCUDAGetArray#

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

Synopsis#

#include "petscmat.h"  
PetscErrorCode MatDenseCUDAGetArray(Mat A, 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(). For read-only access, use MatDenseCUDAGetArrayRead().

See Also#

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

Level#

developer

Location#

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

Implementations#

MatDenseCUDAGetArray_MPIDenseCUDA in src/mat/impls/dense/mpi/mpidense.c
MatDenseCUDAGetArray_SeqDenseCUDA in src/mat/impls/dense/seq/cuda/densecuda.cu

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