每个块的最大线程数 [英] maximum number of threads per block

问题描述

我有以下信息：

Maximum number of threads per block:           512
Maximum sizes of each dimension of a block:    512 x 512 x 64

这意味着2d中的最大线程数线程块是512x512，它在每个块中给我一个262144个线程？

如果是，那么这是一个很好的做法是在内核中有最少256个线程的这个线程数量？

does this mean that the maximum number of threads in a 2d thread block is 512x512 which gives me a 262144 threads in every block?
if yes, then is it a good practice to have this number of threads in a a kernel of minimum 256 blocks?

推荐答案

不，这意味着每个块的最大线程数为512，

No, it means that the maximum threads per block is 512,

如何将它放在[1 ... 512] x [1 ... 512] x [1 ... 64]。

You can decide how to lay that out over [1 ... 512] x [1 ... 512] x [1 ... 64].

在2D中确定。

对于块大小的决定，很多事情都会考虑，比如一个块需要的内存量， -warp是在硬件上（我不记得如果它总是16在Nvidia硬件）。

As for the deciding on the size of the block, lots of things come into consideration, like the amount of memory a block needs and how big a half-warp is on the hardware (I don't remember if its always 16 on Nvidia hardware).

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