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ncnn中Mat类设计的内存对齐问题 #5510

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HuPengsheet opened this issue Jun 13, 2024 · 1 comment

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HuPengsheet commented Jun 13, 2024

ncnn中的Mat类，是在channel维度上对齐的，有一个c_step参数。
我在b站看过作者的讲解，说这个对齐主要考虑到ARMV7和openmp下的cache miss导致的性能原因。
想请问一下，这个cache miss是怎么理解，我想学习一下这个内存对齐对于性能的影响。

感谢！

Member

nihui commented Jun 19, 2024

armv7 对齐访问速度快
对齐还能避免 openmp false sharing

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