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Subject: [OMPI devel] mpi very slow to start on Mac OS X
From: Christopher Jefferson (chris_at_[hidden])
Date: 2009-05-06 16:05:18


I am using the system openmpi (1.2.3) on Mac OS X 10.5.6, gcc 4.0.1. I
believe these are all the standard tools.

If I mpirun as:

mpirun -n 2 ./a.out

Using the test code from http://www.boost.org/doc/libs/1_39_0/doc/html/mpi/getting_started.html#mpi.config
  (note that at the moment I have not installed, and am not using,
boost)

I get the following output:

~/temp$ time mpirun -n 2 ./mpi-test
[christopher-jeffersons-macbook.local:06005] [0,1,0]-[0,0,0]
mca_oob_tcp_peer_complete_connect: connection failed: Connection
refused (61) - retrying
[christopher-jeffersons-macbook.local:06006] [0,1,1]-[0,0,0]
mca_oob_tcp_peer_complete_connect: connection failed: Connection
refused (61) - retrying
[christopher-jeffersons-macbook.local:06005] [0,1,0]-[0,0,0]
mca_oob_tcp_peer_complete_connect: connection failed: Operation timed
out (60) - retrying
[christopher-jeffersons-macbook.local:06006] [0,1,1]-[0,0,0]
mca_oob_tcp_peer_complete_connect: connection failed: Operation timed
out (60) - retrying
[christopher-jeffersons-macbook.local:06005] [0,1,0]-[0,1,1]
mca_oob_tcp_peer_complete_connect: connection failed: Connection
refused (61) - retrying
[christopher-jeffersons-macbook.local:06005] [0,1,0]-[0,1,1]
mca_oob_tcp_peer_complete_connect: connection failed: Operation timed
out (60) - retrying
Rank 0 OK!
Rank 1 OK!

real 3m52.070s
user 0m0.019s
sys 0m0.025s

Note in particular the time.

Running just ' int main(void) { }' takes about 1 minute 16 seconds.

Any suggestions very welcome!