在分離呼叫時提升MPI塊

我在每臺機器上使用MPICH和Boost爲3個虛擬機設置了一個Beowulf羣集。我的程序在羣集上正常工作，但是當我嘗試使用boost :: split時，無限期地執行塊。在分離呼叫時提升MPI塊

看看下面的代碼：

#include <boost/mpi.hpp> 
#include <iostream> 

namespace mpi = boost::mpi; 

int main (int argc , char* argv[]) 
{ 
    mpi::environment env(argc,argv); 
    mpi::communicator world; 

    int group_id = world.rank()%3; 

    mpi::communicator local = world.split(group_id); 

    std::cout << "I am process " << world.rank() << " of " << world.size() << "." << std::endl; 

    std::cout << "I am sub-process " << local.rank() << " of " << local.size() << "." << std::endl; 



    return 0; 
}

當集羣上執行，沒有任何反應。但如果我只在單個節點上執行它（讓我們用-np 9說了），它工作得很好：

I am process 5 of 9. 
I am process 2 of 9. 
I am process 3 of 9. 
I am process 1 of 9. 
I am process 6 of 9. 
I am process 7 of 9. 
I am process 0 of 9. 
I am process 4 of 9. 
I am sub-process 2 of 3. 
I am sub-process 0 of 3. 
I am sub-process 1 of 3. 
I am sub-process 2 of 3. 
I am sub-process 1 of 3. 
I am sub-process 1 of 3. 
I am sub-process 0 of 3. 
I am process 8 of 9. 
I am sub-process 2 of 3. 
I am sub-process 0 of 3.

刪除了boost ::拆分呼叫使得例如執行按預期在3節點，所以這裏的分裂呼叫顯然是有罪的。

任何想法我做錯了boost :: split？

來源

2017-04-26 user5046689