我设法解决了这个问题.老实说，这真是愚蠢.由于某种原因，我没有使用正确的OpenMPI安装(我不知道它使用的是哪个).我使用正确的mpif90重新编译并使用正确的mpirun运行它，现在我得到了预期的结果. 抱歉给您带来的困惑，但是我对此很陌生.谢谢您的帮助！

I managed to solve it. It was quite silly, to be honest. For some reason I was not using the right OpenMPI installation (I have no idea which it was using). I recompiled using the right mpif90 and run it using the right mpirun and now I get the expected result. Sorry for the confusion, but I am quite new to this. And thank you for the help!