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#

PetscErrorCode MatDenseCUDAGetArrayRead(Mat A, const PetscScalar **a)

Not Collective

Input Parameter#

  • A - the matrix

Output Parameter#

  • a - the GPU array in column major order

Note#

Data may 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/cupm/cuda/matmpidensecuda.cu

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