template<typename
OffsetT>
class cub::GridQueue< OffsetT >
GridQueue is a descriptor utility for dynamic queue management.
- Overview
- GridQueue descriptors provides abstractions for "filling" or "draining" globally-shared vectors.
- A "filling" GridQueue works by atomically-adding to a zero-initialized counter, returning a unique offset for the calling thread to write its items. The GridQueue maintains the total "fill-size". The fill counter must be reset using GridQueue::ResetFill by the host or kernel instance prior to the kernel instance that will be filling.
- Similarly, a "draining" GridQueue works by works by atomically-incrementing a zero-initialized counter, returning a unique offset for the calling thread to read its items. Threads can safely drain until the array's logical fill-size is exceeded. The drain counter must be reset using GridQueue::ResetDrain or GridQueue::FillAndResetDrain by the host or kernel instance prior to the kernel instance that will be filling. (For dynamic work distribution of existing data, the corresponding fill-size is simply the number of elements in the array.)
- Iterative work management can be implemented simply with a pair of flip-flopping work buffers, each with an associated set of fill and drain GridQueue descriptors.
- Template Parameters
-
| OffsetT | Signed integer type for global offsets |
Definition at line 82 of file grid_queue.cuh.
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| __host__ __device__ __forceinline__ | GridQueue () |
| | Constructs an invalid GridQueue descriptor.
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| __host__ __device__ __forceinline__ | GridQueue (void *d_storage) |
| | Constructs a GridQueue descriptor around the device storage allocation.
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| __host__ __device__ __forceinline__ cudaError_t | FillAndResetDrain (OffsetT fill_size, cudaStream_t stream=0) |
| | This operation sets the fill-size and resets the drain counter, preparing the GridQueue for draining in the next kernel instance. To be called by the host or by a kernel prior to that which will be draining.
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| __host__ __device__ __forceinline__ cudaError_t | ResetDrain (cudaStream_t stream=0) |
| | This operation resets the drain so that it may advance to meet the existing fill-size. To be called by the host or by a kernel prior to that which will be draining.
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| __host__ __device__ __forceinline__ cudaError_t | ResetFill (cudaStream_t stream=0) |
| | This operation resets the fill counter. To be called by the host or by a kernel prior to that which will be filling.
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| __host__ __device__ __forceinline__ cudaError_t | FillSize (OffsetT &fill_size, cudaStream_t stream=0) |
| | Returns the fill-size established by the parent or by the previous kernel.
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| __device__ __forceinline__ OffsetT | Drain (OffsetT num_items) |
| | Drain num_items from the queue. Returns offset from which to read items. To be called from CUDA kernel.
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| __device__ __forceinline__ OffsetT | Fill (OffsetT num_items) |
| | Fill num_items into the queue. Returns offset from which to write items. To be called from CUDA kernel.
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1.9.8