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grid_mapping.cuh

/******************************************************************************
* Copyright (c) 2011, Duane Merrill. All rights reserved.
* Copyright (c) 2011-2013, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
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* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
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* documentation and/or other materials provided with the distribution.
* * Neither the name of the NVIDIA CORPORATION nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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******************************************************************************/
/**
* \file
* cub::GridMappingStrategy enumerates alternative strategies for mapping constant-sized tiles of device-wide data onto a grid of CUDA thread blocks.
*/
#pragma once
#include "../util_namespace.cuh"
/// Optional outer namespace(s)
CUB_NS_PREFIX
/// CUB namespace
namespace cub {
/**
* \addtogroup GridModule
* @{
*/
/******************************************************************************
* Mapping policies
*****************************************************************************/
/**
* \brief cub::GridMappingStrategy enumerates alternative strategies for mapping constant-sized tiles of device-wide data onto a grid of CUDA thread blocks.
*/
enum GridMappingStrategy
{
/**
* \brief An "even-share" strategy for assigning input tiles to thread blocks.
*
* \par Overview
* The input is evenly partitioned into \p p segments, where \p p is
* constant and corresponds loosely to the number of thread blocks that may
* actively reside on the target device. Each segment is comprised of
* consecutive tiles, where a tile is a small, constant-sized unit of input
* to be processed to completion before the thread block terminates or
* obtains more work. The kernel invokes \p p thread blocks, each
* of which iteratively consumes a segment of <em>n</em>/<em>p</em> elements
* in tile-size increments.
*/
GRID_MAPPING_EVEN_SHARE,
/**
* \brief A dynamic "queue-based" strategy for assigning input tiles to thread blocks.
*
* \par Overview
* The input is treated as a queue to be dynamically consumed by a grid of
* thread blocks. Work is atomically dequeued in tiles, where a tile is a
* unit of input to be processed to completion before the thread block
* terminates or obtains more work. The grid size \p p is constant,
* loosely corresponding to the number of thread blocks that may actively
* reside on the target device.
*/
GRID_MAPPING_DYNAMIC,
};
/** @} */ // end group GridModule
} // CUB namespace
CUB_NS_POSTFIX // Optional outer namespace(s)

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