63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
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// ----------------------------------------------------------------------------
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// - Open3D: www.open3d.org -
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// ----------------------------------------------------------------------------
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// Copyright (c) 2018-2023 www.open3d.org
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// SPDX-License-Identifier: MIT
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// ----------------------------------------------------------------------------
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//***************************************************************************************/
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//
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// Based on Pointnet2 Library (MIT License):
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// https://github.com/sshaoshuai/Pointnet2.PyTorch
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//
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// Copyright (c) 2019 Shaoshuai Shi
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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//***************************************************************************************/
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#pragma once
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#include <cmath>
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namespace open3d {
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namespace ml {
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namespace contrib {
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#define TOTAL_THREADS 1024
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#define THREADS_PER_BLOCK 256
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#define DIVUP(m, n) ((m) / (n) + ((m) % (n) > 0))
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inline int OptNumThreads(int work_size) {
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const int pow_2 = std::log(static_cast<double>(work_size)) / std::log(2.0);
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return max(min(1 << pow_2, TOTAL_THREADS), 1);
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}
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inline dim3 OptBlockConfig(int x, int y) {
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const int x_threads = OptNumThreads(x);
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const int y_threads =
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max(min(OptNumThreads(y), TOTAL_THREADS / x_threads), 1);
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dim3 block_config(x_threads, y_threads, 1);
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return block_config;
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}
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} // namespace contrib
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} // namespace ml
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} // namespace open3d
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