Hi,
I have a problem running mpi C++ executable on multiple nodes.
I wrote a simple HellowWorld application in C++. Unfortunately, it only
runs on the local node and does not run on remote nodes. The exact same
program in C works fine on multiple nodes.
<Output from running C helloworld>
$ mpicc hello.c -o helloC
$ mpirun -np 5 helloC
Hello, world! I am 0 of 5.
Hello, world! I am 1 of 5.
Hello, world! I am 3 of 5.
Hello, world! I am 2 of 5.
Hello, world! I am 4 of 5.
<Output from running C++ helloworld>
$ mpic++ hello.cpp -o helloCpp
$ mpirun -np 5 helloCpp
Hello, I am 0 of 1
I found a similar problem in the mailing list
(http://www.lam-mpi.org/MailArchives/lam/msg04970.php), however I can
run individual executable on each node and mpirun does not throw any
error message at all.
All nodes run the same LAM version and file system on Linux kernel 2.4.26.
I also attached output from lamboot and lamnodes and C/C++ hello world
program at the end of this mail.
I want to develop C++ application, so I really appreciate if somebody could
help me out here.
Thank you.
Hiroshi
$ lamboot -v hostfile
LAM 7.0.6/MPI 2 C++/ROMIO - Indiana University
n-1<8803> ssi:boot:base:linear: booting n0 (weill.cse.unsw.edu.au)
n-1<8803> ssi:boot:base:linear: booting n1 (vina01.cse.unsw.edu.au)
n-1<8803> ssi:boot:base:linear: booting n2 (vina02.cse.unsw.edu.au)
n-1<8803> ssi:boot:base:linear: booting n3 (vina03.cse.unsw.edu.au)
n-1<8803> ssi:boot:base:linear: booting n4 (vina04.cse.unsw.edu.au)
n-1<8803> ssi:boot:base:linear: finished
$ lamnodes
n0 weill.orchestra.cse.unsw.EDU.AU:1:origin,this_node
n1 vina01.orchestra.cse.unsw.EDU.AU:1:
n2 vina02.orchestra.cse.unsw.EDU.AU:1:
n3 vina03.orchestra.cse.unsw.EDU.AU:1:
n4 vina04.orchestra.cse.unsw.EDU.AU:1:
hello.c
----------------------------------------------------------------------
#include <stdlib.h>
#include <mpi.h>
int main(int argc, char *argv[]) {
int rank, size;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
printf("Hello, world! I am %d of %d.\n", rank, size);
MPI_Finalize();
return 0;
}
----------------------------------------------------------------------
hello.cpp
----------------------------------------------------------------------
#include <iostream>
#include <mpi.h>
using namespace std;
int main(int argc, char* argv[]) {
MPI::Init(argc, argv);
cout << "Hello, I am " << MPI::COMM_WORLD.Get_rank();
cout << " of " << MPI::COMM_WORLD.Get_size();
MPI::Finalize();
return 0;
}
----------------------------------------------------------------------
----------------------------------------------------
Hiroshi Higuchi <hiroshih_at_[hidden]>
----------------------------------------------------
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