每个网格的最大块数：CUDA [英] Maximum blocks per grid:CUDA

问题描述

每个内核启动时可以创建的网格中的最大块数是多少？这里有点困惑因为

What is the maximum number of blocks in a grid that can created per kernel launch? I am slightly confused here since

现在计算能力表这里说，在CUDA计算能力2.0中每个网格可以有65535个块。

Now the compute capability table here says that there can be 65535 blocks per grid dimemsion in CUDA compute capability 2.0.

这意味着块的总数= 65535 * 65535？

Does that mean the total number of blocks = 65535*65535?

或者说这意味着你最多可以将65535重新排列成65536块的1d网格
或sqrt（65535）的2d网格* sqrt（65535） ？

Or does it mean that you can rearrange at most 65535 into a 1d grid of 65536 blocks or 2d grid of sqrt(65535) * sqrt(65535) ?

谢谢。

推荐答案

65535每个网格的维度。在计算1.x卡上，支持1D和2D网格。在计算2.x卡上，还支持3D网格，因此65535，65535 x 65535和65535 x 65535 x 65535是Fermi（计算2.x）卡的限制。

65535 per dimension of the grid. On compute 1.x cards, 1D and 2D grids are supported. On compute 2.x cards, 3D grids are also supported, so 65535, 65535 x 65535, and 65535 x 65535 x 65535 are the limits for Fermi (compute 2.x) cards.

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