22 lines
550 B
C++
22 lines
550 B
C++
#pragma once
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// from pytorch.aten
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#include "tensorview.h"
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namespace tv
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{
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namespace launch
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{
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template <typename T1, typename T2>
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inline int DivUp(const T1 a, const T2 b) { return (a + b - 1) / b; }
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// Use 1024 threads per block, which requires cuda sm_2x or above
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constexpr int CUDA_NUM_THREADS = 1024;
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// CUDA: number of blocks for threads.
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inline int getBlocks(const int N)
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{
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TV_ASSERT_RT_ERR(N > 0, "CUDA kernel launch blocks must be positive, but got N=", N);
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return DivUp(N, CUDA_NUM_THREADS);
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}
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} // namespace launch
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} // namespace tv
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