Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 1 | /* |
Simone Pellegrini | 7f7936a | 2018-03-29 11:59:28 +0200 | [diff] [blame] | 2 | * Copyright (c) 2017-2018 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 | |
| 34 | using namespace arm_compute; |
| 35 | |
| 36 | OMPScheduler &OMPScheduler::get() |
| 37 | { |
| 38 | static OMPScheduler scheduler; |
| 39 | return scheduler; |
| 40 | } |
| 41 | |
Moritz Pflanzer | f4af76e | 2017-09-06 07:42:43 +0100 | [diff] [blame] | 42 | OMPScheduler::OMPScheduler() // NOLINT |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 43 | : _num_threads(omp_get_max_threads()) |
| 44 | { |
| 45 | } |
| 46 | |
| 47 | unsigned int OMPScheduler::num_threads() const |
| 48 | { |
| 49 | return _num_threads; |
| 50 | } |
| 51 | |
| 52 | void OMPScheduler::set_num_threads(unsigned int num_threads) |
| 53 | { |
| 54 | const unsigned int num_cores = omp_get_max_threads(); |
Georgios Pinitas | 4bd9fda | 2017-10-04 12:35:58 +0100 | [diff] [blame] | 55 | _num_threads = (num_threads == 0) ? num_cores : num_threads; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 56 | } |
| 57 | |
Anthony Barbier | 376c85f | 2018-05-25 14:17:21 +0100 | [diff] [blame] | 58 | void OMPScheduler::schedule(ICPPKernel *kernel, const Hints &hints) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 59 | { |
| 60 | 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] | 61 | ARM_COMPUTE_ERROR_ON_MSG(hints.strategy() == StrategyHint::DYNAMIC, |
| 62 | "Dynamic scheduling is not supported in OMPScheduler"); |
Georgios Pinitas | 4bd9fda | 2017-10-04 12:35:58 +0100 | [diff] [blame] | 63 | |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 64 | const Window &max_window = kernel->window(); |
Anthony Barbier | 376c85f | 2018-05-25 14:17:21 +0100 | [diff] [blame] | 65 | const unsigned int num_iterations = max_window.num_iterations(hints.split_dimension()); |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 66 | const unsigned int num_threads = std::min(num_iterations, _num_threads); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 67 | |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 68 | if(!kernel->is_parallelisable() || num_threads == 1) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 69 | { |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 70 | ThreadInfo info; |
| 71 | info.cpu_info = &_cpu_info; |
Georgios Pinitas | 4bd9fda | 2017-10-04 12:35:58 +0100 | [diff] [blame] | 72 | kernel->run(max_window, info); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 73 | } |
| 74 | else |
| 75 | { |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 76 | const unsigned int num_windows = num_threads; |
| 77 | std::vector<IScheduler::Workload> workloads(num_windows); |
| 78 | for(unsigned int t = 0; t < num_windows; t++) |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 79 | { |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 80 | //Capture 't' by copy, all the other variables by reference: |
| 81 | workloads[t] = [t, &hints, &max_window, &num_windows, &kernel](const ThreadInfo & info) |
| 82 | { |
| 83 | Window win = max_window.split_window(hints.split_dimension(), t, num_windows); |
| 84 | win.validate(); |
| 85 | kernel->run(win, info); |
| 86 | }; |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 87 | } |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 88 | run_workloads(workloads); |
| 89 | } |
| 90 | } |
| 91 | |
Vidhya Sudhan Loganathan | d646ae1 | 2018-11-19 15:18:20 +0000 | [diff] [blame] | 92 | #ifndef DOXYGEN_SKIP_THIS |
Georgios Pinitas | 584252d | 2018-06-29 18:25:22 +0100 | [diff] [blame] | 93 | void OMPScheduler::run_workloads(std::vector<arm_compute::IScheduler::Workload> &workloads) |
| 94 | { |
| 95 | const unsigned int num_threads = std::min(_num_threads, static_cast<unsigned int>(workloads.size())); |
| 96 | if(num_threads < 1) |
| 97 | { |
| 98 | return; |
| 99 | } |
| 100 | |
| 101 | ThreadInfo info; |
| 102 | info.cpu_info = &_cpu_info; |
| 103 | info.num_threads = num_threads; |
| 104 | #pragma omp parallel firstprivate(info) num_threads(num_threads) |
| 105 | { |
| 106 | const int tid = omp_get_thread_num(); |
| 107 | info.thread_id = tid; |
| 108 | workloads[tid](info); |
Anthony Barbier | 6ff3b19 | 2017-09-04 18:44:23 +0100 | [diff] [blame] | 109 | } |
| 110 | } |
Vidhya Sudhan Loganathan | d646ae1 | 2018-11-19 15:18:20 +0000 | [diff] [blame] | 111 | #endif /* DOXYGEN_SKIP_THIS */ |