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#ifndef _CUDA_UTILS_H |
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#define _CUDA_UTILS_H |
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#include <cmath> |
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#include <algorithm> |
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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 opt_n_threads(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 std::max(std::min(1 << pow_2, TOTAL_THREADS), 1); |
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} |
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inline dim3 opt_block_config(int x, int y) { |
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const int x_threads = opt_n_threads(x); |
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const int y_threads = std::max(std::min(opt_n_threads(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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#endif |
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