cuda Namespace Reference

CUDA kernel for volume editing. More...

Functions
void	set_voxel_values (cudaArray *dst_brick, const int dst_brick_size[3], const cudaIpcMemHandle_t &src_brick_ipc_handle, unsigned char *d_src_brick, const int src_brick_size[3], size_t src_mem_offset, int device_id)
	Copy a brick already allocated in device memory (by the application) to the internal IndeX cudaArray representation by using CUDA IPC. More...
void	alloc_IPC_brick (cudaIpcMemHandle_t &ipc_handle, unsigned char **d_voxels, const unsigned char *h_voxels, int nb_voxels, int device_id)
	Upload(allocate) a host brick on device memory and return its CUDA IPC handle. More...
void	get_IPC_brick (unsigned char *h_voxels, int nb_voxels, cudaIpcMemHandle_t &ipc_handle, int device_id)
	Download a pre allocated brick to host array by using its CUDA IPC handle. More...
void	free_IPC_brick (cudaIpcMemHandle_t &ipc_handle, int device_id)
	Free device memory associated to the brick. More...
void	update_brick (unsigned char *d_voxels, int brick_size[3], int device_id)
	Sample brick update function. More...
cudaError_t	copy_device_to_device (cudaArray *pdst, const void *psrc, size_t fmt_size, uint3 &src_extent, uint3 &src_offset, uint3 &dst_offset, uint3 &copy_extend, const cudaStream_t cuda_stream)
	Utility functions. More...
void	enum_cuda_devices (char *buff, int buff_len)
	Build a string with all device information for the current host. More...
int	get_nb_gpus ()
	Get the number of GPU available for the current host. More...

Detailed Description

CUDA kernel for volume editing.

Function Documentation

void cuda::alloc_IPC_brick	(	cudaIpcMemHandle_t &	ipc_handle,
		unsigned char **	d_voxels,
		const unsigned char *	h_voxels,
		int	nb_voxels,
		int	device_id
	)

Upload(allocate) a host brick on device memory and return its CUDA IPC handle.

Parameters

[out]	ipc_handle	The CUDA IPC handle of the destination brick
[out]	d_voxels	Device pointer of the destination brick
[in]	h_voxels	Host pointer of the source brick.
[in]	nb_voxels	The total number of voxels for the brick.
[in]	device_id	The device id of the GPU that owns the brick

cudaError_t cuda::copy_device_to_device	(	cudaArray *	pdst,
		const void *	psrc,
		size_t	fmt_size,
		uint3 &	src_extent,
		uint3 &	src_offset,
		uint3 &	dst_offset,
		uint3 &	copy_extend,
		const cudaStream_t	cuda_stream
	)

Utility functions.

Device to device memory copy from some source to a CudaArray

void cuda::enum_cuda_devices	(	char *	buff,
		int	buff_len
	)

Build a string with all device information for the current host.

void cuda::free_IPC_brick	(	cudaIpcMemHandle_t &	ipc_handle,
		int	device_id
	)

Free device memory associated to the brick.

Parameters

[in]	ipc_handle	The CUDA IPC handle of the source brick
[in]	device_id	The device id of the GPU that owns the brick

void cuda::get_IPC_brick	(	unsigned char *	h_voxels,
		int	nb_voxels,
		cudaIpcMemHandle_t &	ipc_handle,
		int	device_id
	)

Download a pre allocated brick to host array by using its CUDA IPC handle.

Parameters

[out]	h_voxels	Host pointer of the destination brick.
[in]	nb_voxels	The total number of voxels for the brick.
[in]	ipc_handle	The CUDA IPC handle of the source brick
[in]	device_id	The device id of the GPU that owns the brick

int cuda::get_nb_gpus

(

)

Get the number of GPU available for the current host.

void cuda::set_voxel_values	(	cudaArray *	dst_brick,
		const int	dst_brick_size[3],
		const cudaIpcMemHandle_t &	src_brick_ipc_handle,
		unsigned char *	d_src_brick,
		const int	src_brick_size[3],
		size_t	src_mem_offset,
		int	device_id
	)

Copy a brick already allocated in device memory (by the application) to the internal IndeX cudaArray representation by using CUDA IPC.

Parameters

[out]	dst_brick	The destination IndeX's volume brick pointer
[in]	dst_brick_size	The size (sx,sy,sz) of the destination brick
[in]	src_brick_ipc_handle	The CUDA IPC handle of the source brick
[in]	d_src_brick	The device memory pointer of the source brick Used when CUDA IPC handle is not available
[in]	src_brick_size	The size (sx,sy,sz) of the source brick
[in]	src_mem_offset	Memory offset for the source brick pointer
[in]	device_id	The device id of the GPU that owns the brick

void cuda::update_brick	(	unsigned char *	d_voxels,
		int	brick_size[3],
		int	device_id
	)

Sample brick update function.

It changes the content of a given brick For this example the functions increases all voxels values in 1.

Parameters

[in]	d_voxels	Device pointer of the source brick
[in]	brick_size	The brick size (sx, sy, sz)
[in]	device_id	The device id of the GPU that owns the brick