:orphan:
# VecCreateSeqCUDAWithArrays
Creates a sequential, array-style vector using CUDA, where the user provides the complete array space to store the vector values. 
## Synopsis
```
#include <petscvec.h> 
PetscErrorCode VecCreateSeqCUDAWithArrays(MPI_Comm comm, PetscInt bs, PetscInt n, const PetscScalar cpuarray[], const PetscScalar gpuarray[], Vec *v)
```
Collective, Possibly Synchronous


## Input Parameters

- ***comm     -*** the communicator, must be `PETSC_COMM_SELF`
- ***bs       -*** the block size
- ***n        -*** the local vector length
- ***cpuarray -*** CPU memory where the vector elements are to be stored (or `NULL`)
- ***gpuarray -*** GPU memory where the vector elements are to be stored (or `NULL`)



## Output Parameter

- ***v -*** the vector





## Notes
If the user-provided array is `NULL`, then `VecCUDAPlaceArray()` can be used at a later stage to
SET the array for storing the vector values. Otherwise, the array must be allocated on the
device.

If both cpuarray and gpuarray are provided, the provided arrays must have identical
values.

The arrays are NOT freed when the vector is destroyed via `VecDestroy()`. The user must free
them themselves, but not until the vector is destroyed.

This function may initialize `PetscDevice`, which may incur a device synchronization.


## See Also
 [](ch_vectors), `PetscDeviceInitialize()`, `VecCreate()`, `VecCreateSeqWithArray()`, `VecCreateSeqCUDA()`,
`VecCreateSeqCUDAWithArray()`, `VecCreateMPICUDA()`, `VecCreateMPICUDAWithArray()`,
`VecCreateMPICUDAWithArrays()`, `VecCUDAPlaceArray()`
C@*/
PetscErrorCode VecCreateSeqCUDAWithArrays(MPI_Comm comm, PetscInt bs, PetscInt n, const PetscScalar cpuarray[], const PetscScalar gpuarray[], Vec *v)
{
PetscFunctionBegin;
PetscCall(VecCreateSeqCUPMWithArraysAsync<DeviceType::CUDA>(comm, bs, n, cpuarray, gpuarray, v));
PetscFunctionReturn(PETSC_SUCCESS);
}

/*@C
VecCreateSeqCUDAWithArray - Creates a sequential, array-style vector using CUDA, where the
user provides the device array space to store the vector values.

Collective, Possibly Synchronous


## Input Parameters

- ***comm     -*** the communicator, must be `PETSC_COMM_SELF`
- ***bs       -*** the block size
- ***n        -*** the vector length
- ***gpuarray -*** GPU memory where the vector elements are to be stored (or `NULL`)



## Output Parameter

- ***v -*** the vector





## Notes
If the user-provided array is `NULL`, then `VecCUDAPlaceArray()` can be used at a later stage to
SET the array for storing the vector values. Otherwise, the array must be allocated on the
device.

The array is NOT freed when the vector is destroyed via `VecDestroy()`. The user must free the
array themselves, but not until the vector is destroyed.

Use `VecDuplicate()` or `VecDuplicateVecs()` to form additional vectors of the same type as an
existing vector.

This function may initialize `PetscDevice`, which may incur a device synchronization.


## See Also
 [](ch_vectors), `PetscDeviceInitialize()`, `VecCreate()`, `VecCreateSeq()`, `VecCreateSeqWithArray()`,
`VecCreateMPIWithArray()`, `VecCreateSeqCUDA()`, `VecCreateMPICUDAWithArray()`, `VecCUDAPlaceArray()`,
`VecDuplicate()`, `VecDuplicateVecs()`, `VecCreateGhost()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/vec/impls/seq/cupm/cuda/vecseqcupm.cu.html#VecCreateSeqCUDAWithArrays">src/vec/vec/impls/seq/cupm/cuda/vecseqcupm.cu</A>


---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/vec/impls/seq/cupm/cuda/vecseqcupm.cu)


[Index of all Vec routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)