Question

我想知道是否有任何命令可以显示MVAPICH安装的启用功能，类似于我们可以为OpenMPI找到的功能：

ompi_info

特别是，我很想知道是否启用了多线程支持。

Answer 1

我建议只运行这样一个简单的测试程序：

#include <stdio.h>
#include <stdlib.h>

#include <mpi.h>

int main(void)
{
  int lvlrequired, lvlprovided;

  lvlrequired = MPI_THREAD_MULTIPLE;

  MPI_Init_thread(NULL, NULL, lvlrequired, &lvlprovided);

  if (lvlprovided < lvlrequired)
    {
      printf("Required level of threading support *not* available\n");
    }
  else
    {
      printf("Required level of threading support *is* available\n");
    }

  MPI_Finalize();

  return(0);
}

在我的Ubuntu笔记本电脑上使用标准的OpenMPI：

me@laptop$ mpicc -o threadcheck threadcheck.c
me@laptop$ mpiexec -n 2 ./threadcheck
Required level of threading support *not* available
Required level of threading support *not* available

与ompi_info：

一致

me@laptop$ ompi_info | grep THREAD_MULTIPLE
          Thread support: posix (MPI_THREAD_MULTIPLE: no, OPAL support: yes, OMPI progress: no, ORTE progress: yes, Event lib: yes)

但如果我请求MPI_THREAD_SERIALIZED

me@laptop$ mpiexec -n 2 ./threadcheck
Required level of threading support *is* available
Required level of threading support *is* available

希望这很有用。

大卫

检查我的MVAPICH是否启用了多线程

1 个答案: