感谢大家的评论和回答.没事的全部与"PIN"选项有关.

Thanks all for the comments and answers. You are all right. It's all about the "PIN" option.

要解决我的问题，我只需要:

To solve my problem, I just had to:

I_MPI_WAIT_MODE = 1

I_MPI_WAIT_MODE=1

I_MPI_PIN_DOMAIN = omp

I_MPI_PIN_DOMAIN=omp

就这么简单.现在所有处理器都适用于所有级别.

Simple as that. Now all processors are available to all ranks.

该选项

I_MPI_DEBUG = 4

I_MPI_DEBUG=4

显示每个等级获得的处理器.

shows which processors each rank gets.