Joao,
You're taking in account the time required to setup the whole
communication framework, which is slower in the case of shared memory
than TCP (I can explain if you care). However, the idea of using
shared memory is to accelerate communications, which are not tested by
your
FWIW, orterun is exactly the same as mpirun (one is a sym link to the
other).
This smacks of having a mismatch of Open MPI versions on different
nodes.
Can you verify that default version of Open MPI that is being found on
all your nodes is the same?
On Nov 30, 2007, at 12:01 AM,
Hello,
Open MPI 1.2.4
I am trying to run a simple C program.
##
#include
#include
#include
#include "mpi.h"
void
main(int argc, char **argv)
{
int tag = 0;
int
MPI_Comm_spawn has to build an intercommunicator with the child process
that it spawns. Thus, you can not spawn a non-MPI job such as
/bin/hostname, since the parent process waits for some messages from the
child process(es) in order to set up the intercommunicator.
Thanks
Edgar
Prakash
Thanks Edgar. I did not know that. Really?
Anyways, you are sure, an MPI job will work as a spawned process
instead of "hostname"?
Thanks,
Prakash
On Dec 1, 2007, at 5:56 PM, Edgar Gabriel wrote:
MPI_Comm_spawn has to build an intercommunicator with the child
process
that it spawns.
