viennacl::ocl Namespace Reference

OpenCL backend. Manages platforms, contexts, buffers, kernels, etc. More...

Classes
struct	accelerator_tag
	A tag identifying OpenCL devices as accelerators (e.g. Intel Xeon Phi) More...
class	backend
	A backend that provides contexts for ViennaCL objects (vector, matrix, etc.) More...
class	build_program_failure
	Exception thrown if the OpenCL program cannot be built, usually due to a syntax error in the OpenCL code. More...
class	command_queue
	A class representing a command queue. More...
class	compiler_not_available
	Exception thrown if the OpenCL just-in-time compiler is not available. More...
class	context
	Manages an OpenCL context and provides the respective convenience functions for creating buffers, etc. More...
struct	cpu_tag
	A tag identifying OpenCL devices as CPUs. More...
struct	default_tag
	A tag denoting the default OpenCL device type (SDK-specific) More...
class	device
	A class representing a compute device (e.g. a GPU) More...
class	device_not_available
	Exception thrown if the selected compute device is not available (maybe locked by another process). More...
class	device_not_found
	Exception thrown in the case that a requested compute device was not found. More...
struct	DOUBLE_PRECISION_CHECKER
	Ensures that double precision types are only allocated if it is supported by the device. If double precision is requested for a device not capable of providing that, a double_precision_not_provided_error is thrown. More...
class	double_precision_not_provided_error
	Exception thrown if the user wants to use double precision arithmetics, but the device does not support double precision. More...
struct	error_checker
	An error reporting class. Template argument is used to avoid problems with external linkage. More...
struct	gpu_tag
	A tag identifying OpenCL devices as GPUs. More...
class	handle
	Handle class the effectively represents a smart pointer for OpenCL handles. More...
class	handle_inc_dec_helper
	Helper for OpenCL reference counting used by class handle. More...
class	image_format_mismatch
	Exception thrown if there is a mismatch in image formats for the operands. More...
class	image_format_not_supported
	Exception thrown if the requested image format is not supported. More...
class	invalid_arg_index
	Exception thrown if the kernel argument index is invalid, e.g. an arg index larger than the number of kernel arguments was provided. More...
class	invalid_arg_size
	Exception thrown if the arguments to an OpenCL kernel have an invalid size e.g. not sizeof(cl_mem)). More...
class	invalid_arg_value
	Exception thrown if the kernel argument provided has an invalid value. More...
class	invalid_binary
	Exception thrown if the OpenCL binary (generated from the jit-compiler or loaded from some other location) won't work on the device (e.g. due to a lack of double precision support). More...
class	invalid_buffer_size
	Exception thrown if the provided buffer size is invalid (e.g. zero) More...
class	invalid_build_options
	Exception thrown if invalid build options are passed to the OpenCL just-in-time compiler. More...
class	invalid_command_queue
	Exception thrown if an invalid OpenCL command queue is provided to an OpenCL function. More...
class	invalid_context
	Exception thrown if an invalid OpenCL context is provided to an OpenCL function. More...
class	invalid_device
	Exception thrown if an invalid OpenCL device is provided to an OpenCL function. More...
class	invalid_device_type
	Exception thrown if an invalid device type is specified. More...
class	invalid_event
	Exception thrown if the provided event object (of type cl_event) is invalid. More...
class	invalid_event_wait_list
	Exception thrown if the provided event wait list is invalid. More...
class	invalid_gl_object
	Exception thrown if the provided OpenGL (not OpenCL) object is invalid. More...
class	invalid_global_offset
	Exception thrown if the provided offset for get_global_id() in OpenCL kernels is invalid. More...
class	invalid_global_work_size
	Exception thrown if the total number of work items is invalid (for example, not divisible by the number of work items per work group). More...
class	invalid_host_ptr
	Exception thrown if the provided pointer to host memory is invalid. More...
class	invalid_image_format_descriptor
	Exception thrown if an invalid image format descriptor is provided. More...
class	invalid_image_size
	Exception thrown if the image size provided is invalid (e.g. zero). More...
class	invalid_kernel
	Exception thrown if the provided kernel object (of type cl_kernel) is invalid (e.g. not initialized, from different context, or corrupted). More...
class	invalid_kernel_args
	Exception thrown if the kernel arguments are invalid and/or do not fit the kernel parameter list. More...
class	invalid_kernel_definition
	Exception thrown if the kernel definition (number of arguments, argument types, etc.) is not the same for all devices for which the program has been built. More...
class	invalid_kernel_name
	Exception thrown if the provided kernel name is invalid (e.g. not part of the program provided). More...
class	invalid_mem_object
	Exception thrown if an invalid OpenCL memory object (of type cl_mem) is passed to an OpenCL funciton. More...
class	invalid_mip_level
	Exception thrown if the provided miplevel is greater than zero, but the OpenGL implementation does not support creating from non-zero mipmap levels. More...
class	invalid_operation
	Exception thrown if interoperability of OpenCL with other frameworks collide. More...
class	invalid_platform
	Exception thrown if an invalid OpenCL platform is provided to an OpenCL function. More...
class	invalid_program
	Exception thrown if an OpenCL program object handle is invalid (e.g. not initialized). More...
class	invalid_program_executable
	Exception thrown if there is no built program exectuable available for the device. More...
class	invalid_property
	Exception thrown if an invalid property is provided to a function (vague value). More...
class	invalid_queue_properties
	Exception thrown if invalid OpenCL command queue properties are provided when creating a command queue. More...
class	invalid_sampler
	Exception thrown if an invalid sampler is provided for an image. More...
class	invalid_value
	Exception thrown is an invalid value is provided to an OpenCL function. More...
class	invalid_work_dimension
	Exception thrown if the work dimension is invalid (usually this means that the work dimension was set to be larger than three. More...
class	invalid_work_group_size
	Exception thrown if the number of work groups is invalid (usually this means that more than 256/512/768/1024 work groups have been specified, but the device(s) cannot support this. More...
class	invalid_work_item_size
	Exception thrown if the number of work items per work group invalid (usually this means that more than 256/512/768/1024 work items have been specified, but the device(s) cannot support this. More...
class	kernel
	Represents an OpenCL kernel within ViennaCL. More...
class	kernel_not_found
class	local_mem
	A class representing local (shared) OpenCL memory. Typically used as kernel argument. More...
class	map_failure
	Exception thrown if the mapping of device memory to the host memory space failed. More...
class	mem_copy_overlap
	Exception thrown if the source buffer overlaps the destination buffer when copying from device memory to device memory. More...
class	mem_object_allocation_failure
	Exception thrown if a memory object cannot be allocated. Usually the requested memory buffer is simply too large. More...
class	out_of_host_memory
	Exception thrown if the host cannot provide enough memory for the datastructures in the OpenCL backend (temporary arrays, etc.) to perform the requested operation. More...
class	out_of_resources
	Exception thrown if the compute device is out of resources (either global memory, registers, etc.) for the requested operation. More...
struct	packed_cl_uint
	Helper class for packing four cl_uint numbers into a uint4 type for access inside an OpenCL kernel. More...
class	platform
	Wrapper class for an OpenCL platform. More...
class	profiling_info_not_available
	Exception thrown if the OpenCL context does not have CL_QUEUE_PROFILING_ENABLE set, if the execution is not complete, or the event object is a user event object. More...
class	program
	Wrapper class for an OpenCL program. More...
class	program_not_found
class	queue_not_found
struct	type_to_string
	Helper class for converting a type to its string representation. More...
class	unknown_error
	Exception thrown if the returned error cannot be resolved to some defined error constant. Might result from invalid sources, invalid memory operations, etc. More...

Enumerations
enum	vendor_id {   beignet_id = 358, intel_id = 32902, nvidia_id = 4318, amd_id = 4098,   unknown_id = 0 }
enum	device_architecture_family {   tesla = 0, fermi, kepler, maxwell,   evergreen, northern_islands, southern_islands, volcanic_islands,   unknown }

Functions
viennacl::ocl::context &	current_context ()
	Convenience function for returning the current context. More...
void	switch_context (long i)
	Convenience function for switching the current context. More...
viennacl::ocl::context &	get_context (long i)
	Convenience function for returning the current context. More...
void	setup_context (long i, std::vector< cl_device_id > const &devices)
	Convenience function for setting devices for a context. More...
void	setup_context (long i, viennacl::ocl::device const &device)
	Convenience function for setting devices for a context. More...
void	setup_context (long i, cl_context c, std::vector< cl_device_id > const &devices, std::map< cl_device_id, std::vector< cl_command_queue > > const &queues)
	Convenience function for setting up a context in ViennaCL from an existing OpenCL context. More...
void	setup_context (long i, cl_context c, std::vector< cl_device_id > const &devices, std::vector< cl_command_queue > const &queues)
	Convenience function for setting up a context in ViennaCL from an existing OpenCL context. More...
void	setup_context (long i, cl_context c, cl_device_id d, cl_command_queue q)
	Convenience function for setting up a context in ViennaCL from an existing OpenCL context. More...
void	set_context_device_type (long i, cl_device_type dev_type)
	Convenience function for setting the default device type for a context. More...
void	set_context_device_type (long i, viennacl::ocl::gpu_tag)
	Convenience function for setting the default device type for a context to GPUs. More...
void	set_context_device_type (long i, viennacl::ocl::cpu_tag)
	Convenience function for setting the default device type for a context to CPUs. More...
void	set_context_device_type (long i, viennacl::ocl::default_tag)
	Convenience function for setting the default device type for a context to the default OpenCL device type. More...
void	set_context_device_type (long i, viennacl::ocl::accelerator_tag)
	Convenience function for setting the default device type for a context to accelerators. More...
void	set_context_device_num (long i, vcl_size_t num)
	Convenience function for setting the number of default devices per context. More...
void	set_context_platform_index (long i, vcl_size_t pf_index)
	Convenience function for setting the platform index. More...
viennacl::ocl::command_queue &	get_queue ()
	Convenience function for getting the default queue for the currently active device in the active context. More...
viennacl::ocl::command_queue &	get_queue (viennacl::ocl::device d, unsigned int queue_id=0)
	Convenience function for getting the queue for a particular device in the current active context. More...
viennacl::ocl::command_queue &	get_queue (cl_device_id dev_id, unsigned int queue_id=0)
	Convenience function for getting the queue for a particular device in the current active context. More...
viennacl::ocl::kernel &	get_kernel (std::string const &prog_name, std::string const &kernel_name)
	Convenience function for getting the kernel for a particular program from the current active context. More...
void	switch_device (viennacl::ocl::device &d)
	Convenience function for switching the active device in the current context. More...
viennacl::ocl::device const &	current_device ()
	Convenience function for returning the active device in the current context. More...
device_architecture_family	get_architecture_family (cl_uint vendor_id, std::string const &name)
template<typename KernelType >
void	enqueue (KernelType &k, viennacl::ocl::command_queue const &queue)
	Enqueues a kernel in the provided queue. More...
template<typename KernelType >
void	enqueue (KernelType &k)
	Convenience function that enqueues the provided kernel into the first queue of the currently active device in the currently active context. More...
void	enqueue (viennacl::device_specific::custom_operation &op, viennacl::ocl::command_queue const &queue)
void	enqueue (viennacl::device_specific::custom_operation &op)
std::vector< platform >	get_platforms ()
template<typename T >
void	append_double_precision_pragma (viennacl::ocl::context const &, std::string &)
template<>
void	append_double_precision_pragma< double > (viennacl::ocl::context const &ctx, std::string &source)

Detailed Description

OpenCL backend. Manages platforms, contexts, buffers, kernels, etc.

Enumeration Type Documentation

enum viennacl::ocl::device_architecture_family

Enumerator
tesla
fermi
kepler
maxwell
evergreen
northern_islands
southern_islands
volcanic_islands
unknown

Definition at line 55 of file device_utils.hpp.

enum viennacl::ocl::vendor_id

Enumerator
beignet_id
intel_id
nvidia_id
amd_id
unknown_id

Definition at line 45 of file device_utils.hpp.

Function Documentation

template<typename T >

void viennacl::ocl::append_double_precision_pragma	(	viennacl::ocl::context const &	,
		std::string &
	)

Definition at line 75 of file utils.hpp.

template<>

void viennacl::ocl::append_double_precision_pragma< double > ( viennacl::ocl::context const &  ctx, std::string &  source  )

inline

Definition at line 78 of file utils.hpp.

viennacl::ocl::context & viennacl::ocl::current_context ( )

inline

Convenience function for returning the current context.

Examples:

blas3.cpp, custom-context.cpp, and custom-kernels.cpp.

Definition at line 213 of file backend.hpp.

viennacl::ocl::device const & viennacl::ocl::current_device ( )

inline

Convenience function for returning the active device in the current context.

Examples:

amg.cpp, armadillo-with-viennacl.cpp, blas3.cpp, eigen-with-viennacl.cpp, mtl4-with-viennacl.cpp, and spai.cpp.

Definition at line 351 of file backend.hpp.

template<typename KernelType >

void viennacl::ocl::enqueue	(	KernelType &	k,
		viennacl::ocl::command_queue const &	queue
	)

Enqueues a kernel in the provided queue.

Examples:

custom-context.cpp, custom-kernels.cpp, and matrix-free.cpp.

Definition at line 50 of file enqueue.hpp.

template<typename KernelType >

void viennacl::ocl::enqueue

(

KernelType &

k

)

Convenience function that enqueues the provided kernel into the first queue of the currently active device in the currently active context.

Definition at line 131 of file enqueue.hpp.

void viennacl::ocl::enqueue ( viennacl::device_specific::custom_operation &  op, viennacl::ocl::command_queue const &  queue  )

inline

Definition at line 136 of file enqueue.hpp.

void viennacl::ocl::enqueue ( viennacl::device_specific::custom_operation &  op )

inline

Definition at line 141 of file enqueue.hpp.

device_architecture_family viennacl::ocl::get_architecture_family ( cl_uint  vendor_id, std::string const &  name  )

inline

Definition at line 72 of file device_utils.hpp.

viennacl::ocl::context& viennacl::ocl::get_context ( long  i )

inline

Convenience function for returning the current context.

Examples:

amg.cpp, examples/tutorial/libviennacl.cpp, multithreaded.cpp, multithreaded_cg.cpp, and spai.cpp.

Definition at line 225 of file backend.hpp.

viennacl::ocl::kernel& viennacl::ocl::get_kernel ( std::string const &  prog_name, std::string const &  kernel_name  )

inline

Convenience function for getting the kernel for a particular program from the current active context.

Definition at line 339 of file backend.hpp.

std::vector< platform > viennacl::ocl::get_platforms ( )

inline

Examples:

amg.cpp, multithreaded.cpp, multithreaded_cg.cpp, spai.cpp, and viennacl-info.cpp.

Definition at line 124 of file platform.hpp.

viennacl::ocl::command_queue& viennacl::ocl::get_queue ( )

inline

Convenience function for getting the default queue for the currently active device in the active context.

Definition at line 320 of file backend.hpp.

viennacl::ocl::command_queue& viennacl::ocl::get_queue ( viennacl::ocl::device  d, unsigned int  queue_id = 0  )

inline

Convenience function for getting the queue for a particular device in the current active context.

Definition at line 326 of file backend.hpp.

viennacl::ocl::command_queue& viennacl::ocl::get_queue ( cl_device_id  dev_id, unsigned int  queue_id = 0  )

inline

Convenience function for getting the queue for a particular device in the current active context.

Definition at line 332 of file backend.hpp.

void viennacl::ocl::set_context_device_num ( long  i, vcl_size_t  num  )

inline

Convenience function for setting the number of default devices per context.

Definition at line 302 of file backend.hpp.

void viennacl::ocl::set_context_device_type ( long  i, cl_device_type  dev_type  )

inline

Convenience function for setting the default device type for a context.

Definition at line 272 of file backend.hpp.

void viennacl::ocl::set_context_device_type ( long  i, viennacl::ocl::gpu_tag    )

inline

Convenience function for setting the default device type for a context to GPUs.

Definition at line 278 of file backend.hpp.

void viennacl::ocl::set_context_device_type ( long  i, viennacl::ocl::cpu_tag    )

inline

Convenience function for setting the default device type for a context to CPUs.

Definition at line 284 of file backend.hpp.

void viennacl::ocl::set_context_device_type ( long  i, viennacl::ocl::default_tag    )

inline

Convenience function for setting the default device type for a context to the default OpenCL device type.

Definition at line 290 of file backend.hpp.

void viennacl::ocl::set_context_device_type ( long  i, viennacl::ocl::accelerator_tag    )

inline

Convenience function for setting the default device type for a context to accelerators.

Definition at line 296 of file backend.hpp.

void viennacl::ocl::set_context_platform_index ( long  i, vcl_size_t  pf_index  )

inline

Convenience function for setting the platform index.

Parameters

i	Context ID
pf_index	The platform index as returned by clGetPlatformIDs(). This is not the ID of type cl_platform_id!

Definition at line 313 of file backend.hpp.

void viennacl::ocl::setup_context ( long  i, std::vector< cl_device_id > const &  devices  )

inline

Convenience function for setting devices for a context.

Examples:

amg.cpp, custom-context.cpp, multithreaded.cpp, multithreaded_cg.cpp, and spai.cpp.

Definition at line 231 of file backend.hpp.

void viennacl::ocl::setup_context ( long  i, viennacl::ocl::device const &  device  )

inline

Convenience function for setting devices for a context.

Definition at line 238 of file backend.hpp.

void viennacl::ocl::setup_context ( long  i, cl_context  c, std::vector< cl_device_id > const &  devices, std::map< cl_device_id, std::vector< cl_command_queue > > const &  queues  )

inline

Convenience function for setting up a context in ViennaCL from an existing OpenCL context.

Definition at line 247 of file backend.hpp.

void viennacl::ocl::setup_context ( long  i, cl_context  c, std::vector< cl_device_id > const &  devices, std::vector< cl_command_queue > const &  queues  )

inline

Convenience function for setting up a context in ViennaCL from an existing OpenCL context.

Definition at line 256 of file backend.hpp.

void viennacl::ocl::setup_context ( long  i, cl_context  c, cl_device_id  d, cl_command_queue  q  )

inline

Convenience function for setting up a context in ViennaCL from an existing OpenCL context.

Definition at line 262 of file backend.hpp.

void viennacl::ocl::switch_context ( long  i )

inline

Convenience function for switching the current context.

Examples:

custom-context.cpp.

Definition at line 219 of file backend.hpp.

void viennacl::ocl::switch_device ( viennacl::ocl::device &  d )

inline

Convenience function for switching the active device in the current context.

Definition at line 345 of file backend.hpp.