CUTLASS: tensor_foreach.h Source File

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device/tensor_foreach.h
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1 /***************************************************************************************************
2 * Copyright (c) 2017-2019, NVIDIA CORPORATION. All rights reserved.
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7 * conditions and the following disclaimer.
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13 * permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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24 **************************************************************************************************/
25 #pragma once
26
27 #include <stdexcept>
28 #include "cutlass/cutlass.h"
29 #include "cutlass/util/reference/device/kernel/tensor_foreach.h"
30
31 namespace cutlass {
32 namespace reference {
33 namespace device {
34
36
38 template <typename Func, int Rank, typename Params>
39 struct TensorForEach {
40
42 TensorForEach(Coord<Rank> size, Params params = Params(), int grid_size = 0, int block_size = 0) {
43
44 if (!grid_size || !block_size) {
45
46 // if grid_size or block_size are zero, query occupancy using the CUDA Occupancy API
47 cudaError_t result = cudaOccupancyMaxPotentialBlockSize(
48 &grid_size,
49 &block_size,
50 reinterpret_cast<void const *>(kernel::TensorForEach<Func, Rank, Params>));
51
52 if (result != cudaSuccess) {
53 throw std::runtime_error("Failed to query occupancy.");
54 }
55
56 // Limit block size. This has the effect of increasing the number of items processed by a
57 // single thread and reduces the impact of initialization overhead.
58 block_size = (block_size < 128 ? block_size : 128);
59 }
60
61 dim3 grid(grid_size, 1, 1);
62 dim3 block(block_size, 1, 1);
63
64 kernel::TensorForEach<Func, Rank, Params><<< grid, block >>>(size, params);
65 }
66 };
67
69
71 template <typename Func, int Rank, typename Params>
72 struct TensorDiagonalForEach {
73
75 TensorDiagonalForEach(Coord<Rank> size, Params params = Params(), int start = 0, int end = -1, int block_size = 128) {
76
77 if (end < 0) {
78 end = size.min();
79 }
80
81 dim3 block(block_size, 1, 1);
82 dim3 grid((end - start + block_size - 1) / block_size, 1, 1);
83
84 kernel::TensorDiagonalForEach<Func, Rank, Params><<< grid, block >>>(size, params, start, end);
85 }
86 };
87
88
90
91 template <typename Element, typename Func>
92 struct BlockForEach {
93
95 BlockForEach(
96 Element *ptr,
97 size_t capacity,
98 typename Func::Params params = typename Func::Params(),
99 int grid_size = 0,
100 int block_size = 0) {
101
102 if (!grid_size || !block_size) {
103
104 // if grid_size or block_size are zero, query occupancy using the CUDA Occupancy API
105 cudaError_t result = cudaOccupancyMaxPotentialBlockSize(
106 &grid_size,
107 &block_size,
108 reinterpret_cast<void const *>(kernel::BlockForEach<Element, Func>));
109
110 if (result != cudaSuccess) {
111 throw std::runtime_error("Failed to query occupancy.");
112 }
113
114 // Limit block size. This has the effect of increasing the number of items processed by a
115 // single thread and reduces the impact of initialization overhead.
116 block_size = (block_size < 128 ? block_size : 128);
117 }
118
119 dim3 grid(grid_size, 1, 1);
120 dim3 block(block_size, 1, 1);
121
122 kernel::BlockForEach<Element, Func><<< grid, block >>>(ptr, capacity, params);
123 }
124 };
125
127
128 } // namespace device
129 } // namespace reference
130 } // namespace cutlass
cutlass
Definition: aligned_buffer.h:35
cutlass::reference::device::TensorDiagonalForEach::TensorDiagonalForEach
TensorDiagonalForEach(Coord< Rank > size, Params params=Params(), int start=0, int end=-1, int block_size=128)
Constructor performs the operation.
Definition: device/tensor_foreach.h:75
cutlass::reference::device::TensorForEach::TensorForEach
TensorForEach(Coord< Rank > size, Params params=Params(), int grid_size=0, int block_size=0)
Constructor performs the operation.
Definition: device/tensor_foreach.h:42
cutlass::reference::device::TensorDiagonalForEach
Launches a kernel calling a functor for each element along a tensor&#39;s diagonal.
Definition: device/tensor_foreach.h:72
cutlass::reference::device::BlockForEach::BlockForEach
BlockForEach(Element *ptr, size_t capacity, typename Func::Params params=typename Func::Params(), int grid_size=0, int block_size=0)
Constructor performs the operation.
Definition: device/tensor_foreach.h:95
cutlass::reference::device::TensorForEach
Launches a kernel calling a functor for each element in a tensor&#39;s index space.
Definition: device/tensor_foreach.h:39
cutlass::Coord
Statically-sized array specifying Coords within a tensor.
Definition: coord.h:43
cutlass::reference::device::BlockForEach
Definition: device/tensor_foreach.h:92
tensor_foreach.h
cutlass.h
Basic include for CUTLASS.