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Showing content from https://arrayfire.org/docs/group__cuda__mat.htm below:

ArrayFire: CUDA specific functions

Accessing ArrayFire's stream, and native device id with other CUDA code. More...

Accessing ArrayFire's stream, and native device id with other CUDA code.

If your software is using ArrayFire's CUDA backend, you can also write custom kernels and do custom memory operations using native CUDA commands. The functions contained in the afcu namespace provide methods to get the stream and native device id that ArrayFire is using.

◆ afcu_cublasSetMathMode() AFAPI af_err afcu_cublasSetMathMode ( cublasMath_t  mode )

Sets the cuBLAS math mode for the internal handle.

See the cuBLAS documentation for additional details

Parameters
[in] mode The cublasMath_t type to set
Returns
af_err error code
◆ afcu_get_native_id() AFAPI af_err afcu_get_native_id ( int *  nativeid, int  id  )

Get the native device id of the CUDA device with id in ArrayFire context.

Parameters
[out] nativeid native device id of the CUDA device with id in ArrayFire context [in] id ArrayFire device id
Returns
af_err error code
◆ afcu_get_stream() AFAPI af_err afcu_get_stream ( cudaStream_t *  stream, int  id  )

This file contain functions that apply only to the CUDA backend.

It will include cuda headers when it is built with NVCC. Otherwise the you can define the AF_DEFINE_CUDA_TYPES before including this file and it will define the cuda types used in this header. Get the stream for the CUDA device with id in ArrayFire context

Parameters
[out] stream CUDA Stream of device with id in ArrayFire context [in] id ArrayFire device id
Returns
af_err error code
◆ afcu_set_native_id()

Set the CUDA device with given native id as the active device for ArrayFire.

Parameters
[in] nativeid native device id of the CUDA device
Returns
af_err error code
◆ getNativeId() static int getNativeId ( int  id ) inlinestatic

Get the native device id of the CUDA device with id in ArrayFire context.

Parameters
[in] id ArrayFire device id
Returns
cuda native id of device

Definition at line 129 of file cuda.h.

130{

131 int retVal;

134 throw af::exception

(

"Failed to get CUDA device native id from ArrayFire"

);

135 return retVal;

136}

An ArrayFire exception class.

@ AF_SUCCESS

The function returned successfully.

AFAPI af_err afcu_get_native_id(int *nativeid, int id)

Get the native device id of the CUDA device with id in ArrayFire context.

◆ getStream() static cudaStream_t getStream ( int  id ) inlinestatic

Get the stream for the CUDA device with id in ArrayFire context.

Parameters
[in] id ArrayFire device id
Returns
cuda stream used by CUDA device

Definition at line 110 of file cuda.h.

111{

112 cudaStream_t retVal;

115 throw af::exception

(

"Failed to get CUDA stream from ArrayFire"

);

116 return retVal;

117}

AFAPI af_err afcu_get_stream(cudaStream_t *stream, int id)

This file contain functions that apply only to the CUDA backend.

◆ setNativeId() static void setNativeId ( int  nativeId ) inlinestatic

Set the CUDA device with given native id as the active device for ArrayFire.

Parameters
[in] nativeId native device id of the CUDA device

Definition at line 147 of file cuda.h.

148{

151 throw af::exception

(

"Failed to change active CUDA device to the device with given native id"

);

152}

AFAPI af_err afcu_set_native_id(int nativeid)

Set the CUDA device with given native id as the active device for ArrayFire.

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