| /* |
| * Copyright (c) 2017 ARM Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #include "arm_compute/runtime/OMP/OMPScheduler.h" |
| |
| #include "arm_compute/core/CPP/ICPPKernel.h" |
| #include "arm_compute/core/Error.h" |
| #include "arm_compute/core/Helpers.h" |
| #include "arm_compute/core/Utils.h" |
| |
| #include <omp.h> |
| |
| using namespace arm_compute; |
| |
| OMPScheduler &OMPScheduler::get() |
| { |
| static OMPScheduler scheduler; |
| return scheduler; |
| } |
| |
| OMPScheduler::OMPScheduler() // NOLINT |
| : _num_threads(omp_get_max_threads()) |
| { |
| } |
| |
| unsigned int OMPScheduler::num_threads() const |
| { |
| return _num_threads; |
| } |
| |
| void OMPScheduler::set_num_threads(unsigned int num_threads) |
| { |
| const unsigned int num_cores = omp_get_max_threads(); |
| _num_threads = num_threads == 0 ? num_cores : num_threads; |
| } |
| |
| void OMPScheduler::schedule(ICPPKernel *kernel, unsigned int split_dimension) |
| { |
| ARM_COMPUTE_ERROR_ON_MSG(!kernel, "The child class didn't set the kernel"); |
| |
| const Window &max_window = kernel->window(); |
| const unsigned int num_iterations = max_window.num_iterations(split_dimension); |
| const unsigned int num_threads = std::min(num_iterations, _num_threads); |
| |
| if(!kernel->is_parallelisable() || 1 == num_threads) |
| { |
| kernel->run(max_window); |
| } |
| else |
| { |
| #pragma omp parallel num_threads(num_threads) |
| { |
| #pragma omp for |
| for(unsigned int t = 0; t < num_threads; ++t) |
| { |
| Window win = max_window.split_window(split_dimension, t, num_threads); |
| win.set_thread_id(t); |
| win.set_num_threads(num_threads); |
| kernel->run(win); |
| } |
| } |
| } |
| } |