CODEWITHSUNDEEP
cudamapreducempigpudistributed-computing
Yik
Yik

Reputation: 525

Fatal error of using MPI in GPU MapReduce

I get a problem in running example of GPMR (a MapReduce framework). I have successfully compiled the examples contained in the framework. But when I run the examples, I get the following error:

Fatal error in MPI_Comm_rank: Invalid communicator, error stack: MPI_Comm_rank(106): MPI_Comm_rank(comm=0x8099680, rank=0x97ba5c8) failed MPI_Comm_rank(64).: Invalid communicator

The commands I issued include "./matmul", "mpiexec -np 2 ./matmul", "mpirun -np 2 ./matmul", where "matmul" is a binary file of a matrix multiply example. and all of them have the same error.

Your answer would be highly appreciated. I am looking forward to your helpful advice.

Regards,

Jay

Upvotes: 0

Views: 316

Answers (1)

Yik
Yik

Reputation: 525

I've solved the problem by compiling the program via the same mpicxx. Previously, I compiled a lib by ...\bin\mipcxx, while the program via mpicx. That is the problem.

Upvotes: 1

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