Class CudaDevice

java.lang.Object
com.ibm.cuda.CudaDevice
public final class CudaDevice extends Object
The CudaDevice class represents a CUDA-capable device.

  • Field Details

    • ATTRIBUTE_ASYNC_ENGINE_COUNT

      public static final int ATTRIBUTE_ASYNC_ENGINE_COUNT
      Number of asynchronous engines.
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    • ATTRIBUTE_CAN_MAP_HOST_MEMORY

      public static final int ATTRIBUTE_CAN_MAP_HOST_MEMORY
      Device can map host memory into CUDA address space.
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    • ATTRIBUTE_CLOCK_RATE

      public static final int ATTRIBUTE_CLOCK_RATE
      Typical clock frequency in kilohertz.
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    • ATTRIBUTE_COMPUTE_CAPABILITY

      public static final int ATTRIBUTE_COMPUTE_CAPABILITY
      Compute capability version number. This value is the major compute capability version * 10 + the minor compute capability version, so a compute capability version 3.5 function would return the value 35.
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    • ATTRIBUTE_COMPUTE_CAPABILITY_MAJOR

      public static final int ATTRIBUTE_COMPUTE_CAPABILITY_MAJOR
      Major compute capability version number.
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    • ATTRIBUTE_COMPUTE_CAPABILITY_MINOR

      public static final int ATTRIBUTE_COMPUTE_CAPABILITY_MINOR
      Minor compute capability version number.
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    • ATTRIBUTE_COMPUTE_MODE

      public static final int ATTRIBUTE_COMPUTE_MODE
      Compute mode (see COMPUTE_MODE_XXX for details).
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    • ATTRIBUTE_CONCURRENT_KERNELS

      public static final int ATTRIBUTE_CONCURRENT_KERNELS
      Device can possibly execute multiple kernels concurrently.
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    • ATTRIBUTE_ECC_ENABLED

      public static final int ATTRIBUTE_ECC_ENABLED
      Device has ECC support enabled.
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    • ATTRIBUTE_GLOBAL_MEMORY_BUS_WIDTH

      public static final int ATTRIBUTE_GLOBAL_MEMORY_BUS_WIDTH
      Global memory bus width in bits.
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    • ATTRIBUTE_INTEGRATED

      public static final int ATTRIBUTE_INTEGRATED
      Device is integrated with host memory.
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    • ATTRIBUTE_KERNEL_EXEC_TIMEOUT

      public static final int ATTRIBUTE_KERNEL_EXEC_TIMEOUT
      Specifies whether there is a run time limit on kernels.
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    • ATTRIBUTE_L2_CACHE_SIZE

      public static final int ATTRIBUTE_L2_CACHE_SIZE
      Size of L2 cache in bytes.
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    • ATTRIBUTE_MAX_BLOCK_DIM_X

      public static final int ATTRIBUTE_MAX_BLOCK_DIM_X
      Maximum block dimension X.
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    • ATTRIBUTE_MAX_BLOCK_DIM_Y

      public static final int ATTRIBUTE_MAX_BLOCK_DIM_Y
      Maximum block dimension Y.
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    • ATTRIBUTE_MAX_BLOCK_DIM_Z

      public static final int ATTRIBUTE_MAX_BLOCK_DIM_Z
      Maximum block dimension Z.
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    • ATTRIBUTE_MAX_GRID_DIM_X

      public static final int ATTRIBUTE_MAX_GRID_DIM_X
      Maximum grid dimension X.
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    • ATTRIBUTE_MAX_GRID_DIM_Y

      public static final int ATTRIBUTE_MAX_GRID_DIM_Y
      Maximum grid dimension Y.
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    • ATTRIBUTE_MAX_GRID_DIM_Z

      public static final int ATTRIBUTE_MAX_GRID_DIM_Z
      Maximum grid dimension Z.
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    • ATTRIBUTE_MAX_PITCH

      public static final int ATTRIBUTE_MAX_PITCH
      Maximum pitch in bytes allowed by memory copies.
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    • ATTRIBUTE_MAX_REGISTERS_PER_BLOCK

      public static final int ATTRIBUTE_MAX_REGISTERS_PER_BLOCK
      Maximum number of 32-bit registers available per block.
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    • ATTRIBUTE_MAX_SHARED_MEMORY_PER_BLOCK

      public static final int ATTRIBUTE_MAX_SHARED_MEMORY_PER_BLOCK
      Maximum shared memory available per block in bytes.
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    • ATTRIBUTE_MAX_THREADS_PER_BLOCK

      public static final int ATTRIBUTE_MAX_THREADS_PER_BLOCK
      Maximum number of threads per block.
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    • ATTRIBUTE_MAX_THREADS_PER_MULTIPROCESSOR

      public static final int ATTRIBUTE_MAX_THREADS_PER_MULTIPROCESSOR
      Maximum resident threads per multiprocessor.
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    • ATTRIBUTE_MAXIMUM_SURFACE1D_LAYERED_LAYERS

      public static final int ATTRIBUTE_MAXIMUM_SURFACE1D_LAYERED_LAYERS
      Maximum layers in a 1D layered surface.
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    • ATTRIBUTE_MAXIMUM_SURFACE1D_LAYERED_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_SURFACE1D_LAYERED_WIDTH
      Maximum 1D layered surface width.
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    • ATTRIBUTE_MAXIMUM_SURFACE1D_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_SURFACE1D_WIDTH
      Maximum 1D surface width.
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    • ATTRIBUTE_MAXIMUM_SURFACE2D_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_SURFACE2D_HEIGHT
      Maximum 2D surface height.
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    • ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_HEIGHT
      Maximum 2D layered surface height.
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    • ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_LAYERS

      public static final int ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_LAYERS
      Maximum layers in a 2D layered surface.
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    • ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_SURFACE2D_LAYERED_WIDTH
      Maximum 2D layered surface width.
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    • ATTRIBUTE_MAXIMUM_SURFACE2D_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_SURFACE2D_WIDTH
      Maximum 2D surface width.
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    • ATTRIBUTE_MAXIMUM_SURFACE3D_DEPTH

      public static final int ATTRIBUTE_MAXIMUM_SURFACE3D_DEPTH
      Maximum 3D surface depth.
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    • ATTRIBUTE_MAXIMUM_SURFACE3D_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_SURFACE3D_HEIGHT
      Maximum 3D surface height.
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    • ATTRIBUTE_MAXIMUM_SURFACE3D_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_SURFACE3D_WIDTH
      Maximum 3D surface width.
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    • ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_LAYERED_LAYERS

      public static final int ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_LAYERED_LAYERS
      Maximum layers in a cubemap layered surface.
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    • ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_LAYERED_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_LAYERED_WIDTH
      Maximum cubemap layered surface width.
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    • ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_SURFACECUBEMAP_WIDTH
      Maximum cubemap surface width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE1D_LAYERED_LAYERS

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE1D_LAYERED_LAYERS
      Maximum layers in a 1D layered texture.
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    • ATTRIBUTE_MAXIMUM_TEXTURE1D_LAYERED_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE1D_LAYERED_WIDTH
      Maximum 1D layered texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE1D_LINEAR_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE1D_LINEAR_WIDTH
      Maximum 1D linear texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE1D_MIPMAPPED_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE1D_MIPMAPPED_WIDTH
      Maximum mipmapped 1D texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE1D_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE1D_WIDTH
      Maximum 1D texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_GATHER_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_GATHER_HEIGHT
      Maximum 2D texture height if CUDA_ARRAY3D_TEXTURE_GATHER is set.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_GATHER_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_GATHER_WIDTH
      Maximum 2D texture width if CUDA_ARRAY3D_TEXTURE_GATHER is set.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_HEIGHT
      Maximum 2D texture height.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_HEIGHT
      Maximum 2D layered texture height.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_LAYERS

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_LAYERS
      Maximum layers in a 2D layered texture.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_LAYERED_WIDTH
      Maximum 2D layered texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_HEIGHT
      Maximum 2D linear texture height.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_PITCH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_PITCH
      Maximum 2D linear texture pitch in bytes.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_LINEAR_WIDTH
      Maximum 2D linear texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_MIPMAPPED_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_MIPMAPPED_HEIGHT
      Maximum mipmapped 2D texture height.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_MIPMAPPED_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_MIPMAPPED_WIDTH
      Maximum mipmapped 2D texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE2D_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE2D_WIDTH
      Maximum 2D texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE3D_DEPTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE3D_DEPTH
      Maximum 3D texture depth.
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    • ATTRIBUTE_MAXIMUM_TEXTURE3D_DEPTH_ALTERNATE

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE3D_DEPTH_ALTERNATE
      Alternate maximum 3D texture depth.
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    • ATTRIBUTE_MAXIMUM_TEXTURE3D_HEIGHT

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE3D_HEIGHT
      Maximum 3D texture height.
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    • ATTRIBUTE_MAXIMUM_TEXTURE3D_HEIGHT_ALTERNATE

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE3D_HEIGHT_ALTERNATE
      Alternate maximum 3D texture height.
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    • ATTRIBUTE_MAXIMUM_TEXTURE3D_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE3D_WIDTH
      Maximum 3D texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURE3D_WIDTH_ALTERNATE

      public static final int ATTRIBUTE_MAXIMUM_TEXTURE3D_WIDTH_ALTERNATE
      Alternate maximum 3D texture width.
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    • ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_LAYERED_LAYERS

      public static final int ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_LAYERED_LAYERS
      Maximum layers in a cubemap layered texture.
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    • ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_LAYERED_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_LAYERED_WIDTH
      Maximum cubemap layered texture width/height.
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    • ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_WIDTH

      public static final int ATTRIBUTE_MAXIMUM_TEXTURECUBEMAP_WIDTH
      Maximum cubemap texture width/height.
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    • ATTRIBUTE_MEMORY_CLOCK_RATE

      public static final int ATTRIBUTE_MEMORY_CLOCK_RATE
      Peak memory clock frequency in kilohertz.
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    • ATTRIBUTE_MULTIPROCESSOR_COUNT

      public static final int ATTRIBUTE_MULTIPROCESSOR_COUNT
      Number of multiprocessors on device.
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    • ATTRIBUTE_PCI_BUS_ID

      public static final int ATTRIBUTE_PCI_BUS_ID
      PCI bus ID of the device.
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    • ATTRIBUTE_PCI_DEVICE_ID

      public static final int ATTRIBUTE_PCI_DEVICE_ID
      PCI device ID of the device.
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    • ATTRIBUTE_PCI_DOMAIN_ID

      public static final int ATTRIBUTE_PCI_DOMAIN_ID
      PCI domain ID of the device.
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    • ATTRIBUTE_STREAM_PRIORITIES_SUPPORTED

      public static final int ATTRIBUTE_STREAM_PRIORITIES_SUPPORTED
      Device supports stream priorities.
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    • ATTRIBUTE_SURFACE_ALIGNMENT

      public static final int ATTRIBUTE_SURFACE_ALIGNMENT
      Alignment requirement for surfaces.
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    • ATTRIBUTE_TCC_DRIVER

      public static final int ATTRIBUTE_TCC_DRIVER
      Device is using TCC driver model.
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    • ATTRIBUTE_TEXTURE_ALIGNMENT

      public static final int ATTRIBUTE_TEXTURE_ALIGNMENT
      Alignment requirement for textures.
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    • ATTRIBUTE_TEXTURE_PITCH_ALIGNMENT

      public static final int ATTRIBUTE_TEXTURE_PITCH_ALIGNMENT
      Pitch alignment requirement for textures.
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    • ATTRIBUTE_TOTAL_CONSTANT_MEMORY

      public static final int ATTRIBUTE_TOTAL_CONSTANT_MEMORY
      Memory available on device for __constant__ variables in a kernel in bytes.
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    • ATTRIBUTE_UNIFIED_ADDRESSING

      public static final int ATTRIBUTE_UNIFIED_ADDRESSING
      Device shares a unified address space with the host.
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    • ATTRIBUTE_WARP_SIZE

      public static final int ATTRIBUTE_WARP_SIZE
      Warp size in threads.
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    • COMPUTE_MODE_DEFAULT

      public static final int COMPUTE_MODE_DEFAULT
      Default compute mode (multiple contexts allowed per device).
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    • COMPUTE_MODE_PROCESS_EXCLUSIVE

      public static final int COMPUTE_MODE_PROCESS_EXCLUSIVE
      Compute exclusive process mode (at most one context used by a single process can be present on this device at a time).
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    • COMPUTE_MODE_PROHIBITED

      public static final int COMPUTE_MODE_PROHIBITED
      Compute prohibited mode (no contexts can be created on this device at this time).
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    • COMPUTE_MODE_THREAD_EXCLUSIVE

      public static final int COMPUTE_MODE_THREAD_EXCLUSIVE
      Exclusive thread mode (at most one context, used by a single thread, can be present on this device at a time).
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    • FLAG_LMEM_RESIZE_TO_MAX

      public static final int FLAG_LMEM_RESIZE_TO_MAX
      Keep local memory allocation after launch.
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    • FLAG_MAP_HOST

      public static final int FLAG_MAP_HOST
      Support mapped pinned allocations.
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    • FLAG_SCHED_AUTO

      public static final int FLAG_SCHED_AUTO
      Automatic scheduling.
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    • FLAG_SCHED_BLOCKING_SYNC

      public static final int FLAG_SCHED_BLOCKING_SYNC
      Set blocking synchronization as default scheduling.
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    • FLAG_SCHED_SPIN

      public static final int FLAG_SCHED_SPIN
      Set spin as default scheduling.
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    • FLAG_SCHED_YIELD

      public static final int FLAG_SCHED_YIELD
      Set yield as default scheduling.
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    • MASK_SCHED

      public static final int MASK_SCHED
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  • Constructor Details

    • CudaDevice

      public CudaDevice(int deviceId)
      Creates a device handle corresponding to deviceId.

      No checking is done on deviceId, but it must be non-negative and less than the value returned getCount() to be useful.

      Parameters:
      deviceId - an integer identifying the device of interest

  • Method Details

    • getCount

      public static int getCount() throws CudaException
      Returns the number of CUDA-capable devices available to the Java host.
      Returns:
      the number of available CUDA-capable devices
      Throws:
      CudaException - if a CUDA exception occurs

    • getDriverVersion

      @Deprecated public static int getDriverVersion() throws CudaException
      Deprecated.
      Use Cuda.getDriverVersion() instead.
      Returns a number identifying the driver version.
      Returns:
      the driver version number
      Throws:
      CudaException - if a CUDA exception occurs

    • getRuntimeVersion

      @Deprecated public static int getRuntimeVersion() throws CudaException
      Deprecated.
      Use Cuda.getRuntimeVersion() instead.
      Returns a number identifying the runtime version.
      Returns:
      the runtime version number
      Throws:
      CudaException - if a CUDA exception occurs

    • addCallback

      public void addCallback(Runnable callback) throws CudaException
      Queues the given callback to be executed when the associated device has completed all previous actions in the default stream.
      Parameters:
      callback - code to run
      Throws:
      CudaException - if a CUDA exception occurs

    • canAccessPeer

      public boolean canAccessPeer(CudaDevice peerDevice) throws CudaException
      Returns whether this device can access memory of the specified peerDevice.
      Parameters:
      peerDevice - the peer device
      Returns:
      true if this device can access memory of peerDevice, false otherwise
      Throws:
      CudaException - if a CUDA exception occurs

    • disablePeerAccess

      public void disablePeerAccess(CudaDevice peerDevice) throws CudaException
      Disable access to memory of peerDevice by this device.
      Parameters:
      peerDevice - the peer device
      Throws:
      CudaException - if a CUDA exception occurs
      SecurityException - if a security manager exists and the calling thread does not have permission to disable peer access

    • enablePeerAccess

      public void enablePeerAccess(CudaDevice peerDevice) throws CudaException
      Enable access to memory of peerDevice by this device.
      Parameters:
      peerDevice - the peer device
      Throws:
      CudaException - if a CUDA exception occurs
      SecurityException - if a security manager exists and the calling thread does not have permission to enable peer access

    • equals

      public boolean equals(Object other)
      Does the argument represent the same device as this?
      Overrides:
      equals in class Object
      Parameters:
      other - Object the object to compare with this object.
      Returns:
      boolean true if the object is the same as this object false if it is different from this object.
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    • getAttribute

      public int getAttribute(int attribute) throws CudaException
      Returns the value of the specified attribute.
      Parameters:
      attribute - the attribute to be queried (see ATTRIBUTE_XXX)
      Returns:
      the attribute value
      Throws:
      CudaException - if a CUDA exception occurs

    • getCacheConfig

      public CudaDevice.CacheConfig getCacheConfig() throws CudaException
      Returns the current cache configuration of this device.
      Returns:
      the current cache configuration
      Throws:
      CudaException - if a CUDA exception occurs

    • getDeviceId

      public int getDeviceId()
      Returns an integer identifying this device (the value provided when this object was constructed).
      Returns:
      an integer identifying this device

    • getFreeMemory

      public long getFreeMemory() throws CudaException
      Returns the amount of free device memory in bytes.
      Returns:
      the number of bytes of free device memory
      Throws:
      CudaException - if a CUDA exception occurs

    • getGreatestStreamPriority

      public int getGreatestStreamPriority() throws CudaException
      Returns the greatest possible priority of a stream on this device. Note that stream priorities follow a convention where lower numbers imply greater priorities.
      Returns:
      the greatest possible priority of a stream on this device
      Throws:
      CudaException - if a CUDA exception occurs

    • getLeastStreamPriority

      public int getLeastStreamPriority() throws CudaException
      Returns the least possible priority of a stream on this device. Note that stream priorities follow a convention where lower numbers imply greater priorities.
      Returns:
      the greatest possible priority of a stream on this device
      Throws:
      CudaException - if a CUDA exception occurs

    • getLimit

      public long getLimit(CudaDevice.Limit limit) throws CudaException
      Returns the value of the specified limit.
      Parameters:
      limit - the limit to be queried
      Returns:
      the value of the specified limit
      Throws:
      CudaException - if a CUDA exception occurs

    • getName

      public String getName() throws CudaException
      Returns the name of this device.
      Returns:
      the name of this device
      Throws:
      CudaException - if a CUDA exception occurs

    • getSharedMemConfig

      public CudaDevice.SharedMemConfig getSharedMemConfig() throws CudaException
      Returns the current shared memory configuration of this device.
      Returns:
      the current shared memory configuration
      Throws:
      CudaException - if a CUDA exception occurs

    • getTotalMemory

      public long getTotalMemory() throws CudaException
      Returns the total amount of memory on this device in bytes.
      Returns:
      the number of bytes of device memory
      Throws:
      CudaException - if a CUDA exception occurs

    • setCacheConfig

      public void setCacheConfig(CudaDevice.CacheConfig config) throws CudaException
      Configures the cache of this device.
      Parameters:
      config - the desired cache configuration
      Throws:
      CudaException - if a CUDA exception occurs
      SecurityException - if a security manager exists and the calling thread does not have permission to set device cache configurations

    • setLimit

      public void setLimit(CudaDevice.Limit limit, long value) throws CudaException
      Configures the specified limit.
      Parameters:
      limit - the limit to be configured
      value - the desired limit value
      Throws:
      CudaException - if a CUDA exception occurs
      SecurityException - if a security manager exists and the calling thread does not have permission to set device limits

    • setSharedMemConfig

      public void setSharedMemConfig(CudaDevice.SharedMemConfig config) throws CudaException
      Configures the shared memory of this device.
      Parameters:
      config - the desired shared memory configuration
      Throws:
      CudaException - if a CUDA exception occurs
      SecurityException - if a security manager exists and the calling thread does not have permission to set device shared memory configurations

    • synchronize

      public void synchronize() throws CudaException
      Synchronizes on this device. This method blocks until the associated device has completed all previous actions in the default stream.
      Throws:
      CudaException - if a CUDA exception occurs