cuda::device Namespace Reference

Definitions and functionality related to CUDA devices (not including the device wrapper type device_t itself) More...

Classes
struct	compute_architecture_t
	A numeric designator of an architectural generation of CUDA devices. More...
struct	compute_capability_t
	A numeric designator of the computational capabilities of a CUDA device. More...
struct	pci_location_t
	Location "coordinates" for a CUDA device on a PCIe bus. More...
class	primary_context_t
	A class for holding the primary context of a CUDA device (device_t). More...
struct	properties_t
	A structure holding a collection various properties of a device. More...

Typedefs
using	multiprocessor_count_t = int
	Type of the number of mutiprocessors within a single GPU.
using	id_t = CUdevice
	Numeric ID of a CUDA device used by the CUDA Runtime API. More...
using	attribute_t = CUdevice_attribute
	CUDA devices have both "attributes" and "properties". More...
using	attribute_value_t = int
	All CUDA device attributes (cuda::device::attribute_t) have a value of this type.
using	flags_t = context::flags_t
using	host_thread_synch_scheduling_policy_t = context::host_thread_synch_scheduling_policy_t

Enumerations
enum	: device::id_t { default_device_id = 0 }

Functions
constexpr compute_capability_t	make_compute_capability (unsigned combined) noexcept
	A named constructor idiom for {compute_capability_t}. More...
constexpr compute_capability_t	make_compute_capability (unsigned major, unsigned minor) noexcept
	A named constructor idiom for {compute_capability_t}.
device::id_t	count ()
	Get the number of CUDA devices usable on the system (with the current CUDA library and kernel driver) More...

Detailed Description

Definitions and functionality related to CUDA devices (not including the device wrapper type device_t itself)

Typedef Documentation

attribute_t

using cuda::device::attribute_t = typedef CUdevice_attribute

CUDA devices have both "attributes" and "properties".

This is the type for attribute identifiers/indices.

id_t

using cuda::device::id_t = typedef CUdevice

Numeric ID of a CUDA device used by the CUDA Runtime API.

Note

at the time of writing and the foreseeable future, this type should be an int.

Enumeration Type Documentation

anonymous enum

anonymous enum : device::id_t

Enumerator
default_device_id	If the CUDA runtime has not been set to a specific device, this is the ID of the device it defaults to.

Function Documentation

count()

device::id_t cuda::device::count ( )

inline

Get the number of CUDA devices usable on the system (with the current CUDA library and kernel driver)

Note

This should be returning an unsigned value; unfortunately, device::handle_t is signed in CUDA for some reason and we maintain compatibility (although this might change in the future). So... the returned type is the same as in cudaGetDeviceCount, a signed integer.

Returns

the number of CUDA devices on this system

Exceptions

cuda::error

if the device count could not be obtained

make_compute_capability()

constexpr compute_capability_t cuda::device::make_compute_capability ( unsigned  combined )

noexcept

A named constructor idiom for {compute_capability_t}.

Parameters

combined

A combination of the major and minor version number, e.g. 91 for major 9, minor 1