optimize index computation #33909
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optimize index computation #33909
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… roll_optimize_kernel
Xreki
reviewed
Jul 5, 2021
paddle/fluid/operators/roll_op.cu
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| dim_idx = (idx / strides[i]) % sizes[i]; | ||
| dim_idx_shift = (dim_idx + shifts[i]) % sizes[i]; | ||
| output_idx = output_idx + (dim_idx_shift - dim_idx) * strides[i]; | ||
| dim_idx = (idx / strides[i]) % sizes[i] + shifts[i]; |
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变量名应符合实际代表的含义，这里应该是原来的dim_idx_shift，且临时变量dim_idx不再需要，应该删除。
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不是dim_idx_shift，就是新的dim_idx位置的预估
paddle/fluid/operators/roll_op.cu
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| @@ -40,9 +40,12 @@ __global__ void RollCudaKernel(const T* input, T* output, int64_t N, | |||
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| #pragma unroll Rank | |||
added 3 commits
July 6, 2021 05:05
… roll_optimize_kernel
… roll_optimize_kernel
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PR types
Performance optimization
PR changes
OPs
Describe
optimize the index computation
Paddle vs Pytorch
axis=(1)
shift=(5)
axis=(0)
shift=(5)
axis=(0,1)
shift=(5,5)