Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
Michele Di Giorgio | d9eaf61 | 2020-07-08 11:12:57 +0100 | [diff] [blame] | 2 | * Copyright (c) 2017-2020 Arm Limited. |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 3 | * |
| 4 | * SPDX-License-Identifier: MIT |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to |
| 8 | * deal in the Software without restriction, including without limitation the |
| 9 | * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| 10 | * sell copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all |
| 14 | * copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | #include "arm_compute/runtime/OMP/OMPScheduler.h" |
| 25 | |
| 26 | #include "arm_compute/core/CPP/ICPPKernel.h" |
| 27 | #include "arm_compute/core/Error.h" |
| 28 | #include "arm_compute/core/Helpers.h" |
| 29 | #include "arm_compute/core/Utils.h" |
Pablo Tello | 7fad9b1 | 2018-03-14 17:55:27 +0000 | [diff] [blame] | 30 | #include "arm_compute/runtime/CPUUtils.h" |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 31 | |
| 32 | #include <omp.h> |
| 33 | |
Georgios Pinitas | 12833d0 | 2019-07-25 13:31:10 +0100 | [diff] [blame] | 34 | namespace arm_compute |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 35 | { |
Moritz Pflanzer | f4af76e | 2017-09-06 07:42:43 +0100 | [diff] [blame] | 36 | OMPScheduler::OMPScheduler() // NOLINT |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 37 | : _num_threads(omp_get_max_threads()) |
| 38 | { |
| 39 | } |
| 40 | |
| 41 | unsigned int OMPScheduler::num_threads() const |
| 42 | { |
| 43 | return _num_threads; |
| 44 | } |
| 45 | |
| 46 | void OMPScheduler::set_num_threads(unsigned int num_threads) |
| 47 | { |
| 48 | const unsigned int num_cores = omp_get_max_threads(); |
Georgios Pinitas | 4bd9fda | 2017-10-04 12:35:58 +0100 | [diff] [blame] | 49 | _num_threads = (num_threads == 0) ? num_cores : num_threads; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 50 | } |
| 51 | |
Anthony Barbier | 376c85f | 2018-05-25 14:17:21 +0100 | [diff] [blame] | 52 | void OMPScheduler::schedule(ICPPKernel *kernel, const Hints &hints) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 53 | { |
| 54 | ARM_COMPUTE_ERROR_ON_MSG(!kernel, "The child class didn't set the kernel"); |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 55 | ARM_COMPUTE_ERROR_ON_MSG(hints.strategy() == StrategyHint::DYNAMIC, |
| 56 | "Dynamic scheduling is not supported in OMPScheduler"); |
Georgios Pinitas | 4bd9fda | 2017-10-04 12:35:58 +0100 | [diff] [blame] | 57 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 58 | const Window &max_window = kernel->window(); |
Anthony Barbier | 376c85f | 2018-05-25 14:17:21 +0100 | [diff] [blame] | 59 | const unsigned int num_iterations = max_window.num_iterations(hints.split_dimension()); |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 60 | const unsigned int num_threads = std::min(num_iterations, _num_threads); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 61 | |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 62 | if(!kernel->is_parallelisable() || num_threads == 1) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 63 | { |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 64 | ThreadInfo info; |
| 65 | info.cpu_info = &_cpu_info; |
Georgios Pinitas | 4bd9fda | 2017-10-04 12:35:58 +0100 | [diff] [blame] | 66 | kernel->run(max_window, info); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 67 | } |
| 68 | else |
| 69 | { |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 70 | const unsigned int num_windows = num_threads; |
| 71 | std::vector<IScheduler::Workload> workloads(num_windows); |
| 72 | for(unsigned int t = 0; t < num_windows; t++) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 73 | { |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 74 | //Capture 't' by copy, all the other variables by reference: |
| 75 | workloads[t] = [t, &hints, &max_window, &num_windows, &kernel](const ThreadInfo & info) |
| 76 | { |
| 77 | Window win = max_window.split_window(hints.split_dimension(), t, num_windows); |
| 78 | win.validate(); |
| 79 | kernel->run(win, info); |
| 80 | }; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 81 | } |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 82 | run_workloads(workloads); |
| 83 | } |
| 84 | } |
| 85 | |
Georgios Pinitas | 0499dff | 2020-07-31 22:21:38 +0100 | [diff] [blame] | 86 | void OMPScheduler::schedule_op(ICPPKernel *kernel, const Hints &hints, ITensorPack &tensors) |
Michalis Spyrou | bcd2352 | 2020-05-21 15:02:36 +0100 | [diff] [blame] | 87 | { |
| 88 | ARM_COMPUTE_ERROR_ON_MSG(!kernel, "The child class didn't set the kernel"); |
| 89 | ARM_COMPUTE_ERROR_ON_MSG(hints.strategy() == StrategyHint::DYNAMIC, |
| 90 | "Dynamic scheduling is not supported in OMPScheduler"); |
| 91 | |
| 92 | const Window &max_window = kernel->window(); |
| 93 | const unsigned int num_iterations = max_window.num_iterations(hints.split_dimension()); |
| 94 | const unsigned int num_threads = std::min(num_iterations, _num_threads); |
| 95 | |
| 96 | if(!kernel->is_parallelisable() || num_threads == 1) |
| 97 | { |
| 98 | ThreadInfo info; |
| 99 | info.cpu_info = &_cpu_info; |
Georgios Pinitas | 0499dff | 2020-07-31 22:21:38 +0100 | [diff] [blame] | 100 | kernel->run_op(tensors, max_window, info); |
Michalis Spyrou | bcd2352 | 2020-05-21 15:02:36 +0100 | [diff] [blame] | 101 | } |
| 102 | else |
| 103 | { |
| 104 | const unsigned int num_windows = num_threads; |
| 105 | std::vector<IScheduler::Workload> workloads(num_windows); |
| 106 | for(unsigned int t = 0; t < num_windows; t++) |
| 107 | { |
| 108 | //Capture 't' by copy, all the other variables by reference: |
Georgios Pinitas | 0499dff | 2020-07-31 22:21:38 +0100 | [diff] [blame] | 109 | workloads[t] = [t, &hints, &max_window, &num_windows, &kernel, &tensors](const ThreadInfo & info) |
Michalis Spyrou | bcd2352 | 2020-05-21 15:02:36 +0100 | [diff] [blame] | 110 | { |
| 111 | Window win = max_window.split_window(hints.split_dimension(), t, num_windows); |
| 112 | win.validate(); |
Georgios Pinitas | 0499dff | 2020-07-31 22:21:38 +0100 | [diff] [blame] | 113 | kernel->run_op(tensors, win, info); |
Michalis Spyrou | bcd2352 | 2020-05-21 15:02:36 +0100 | [diff] [blame] | 114 | }; |
| 115 | } |
| 116 | run_workloads(workloads); |
| 117 | } |
| 118 | } |
Vidhya Sudhan Loganathan | d646ae1 | 2018-11-19 15:18:20 +0000 | [diff] [blame] | 119 | #ifndef DOXYGEN_SKIP_THIS |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 120 | void OMPScheduler::run_workloads(std::vector<arm_compute::IScheduler::Workload> &workloads) |
| 121 | { |
| 122 | const unsigned int num_threads = std::min(_num_threads, static_cast<unsigned int>(workloads.size())); |
| 123 | if(num_threads < 1) |
| 124 | { |
| 125 | return; |
| 126 | } |
| 127 | |
| 128 | ThreadInfo info; |
| 129 | info.cpu_info = &_cpu_info; |
| 130 | info.num_threads = num_threads; |
| 131 | #pragma omp parallel firstprivate(info) num_threads(num_threads) |
| 132 | { |
| 133 | const int tid = omp_get_thread_num(); |
| 134 | info.thread_id = tid; |
| 135 | workloads[tid](info); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 136 | } |
| 137 | } |
Vidhya Sudhan Loganathan | d646ae1 | 2018-11-19 15:18:20 +0000 | [diff] [blame] | 138 | #endif /* DOXYGEN_SKIP_THIS */ |
Georgios Pinitas | 12833d0 | 2019-07-25 13:31:10 +0100 | [diff] [blame] | 139 | } // namespace arm_compute |