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I still have a problem to select an interface with openmpi-1.1a7 on
I compile in 64 bit mode, with Studio11 compilers
I attempted to force interface exclusion without success.
This problem is critical for us because we'll soon have Infiniband
interfaces for mpi traffic.
roch_at_n15 ~/MPI > mpirun --mca btl_tcp_if_exclude bge1 -np 2 -host
Process 0 is alive on n15
Process 1 is alive on n27
[n27:05110] *** An error occurred in MPI_Barrier
[n27:05110] *** on communicator MPI_COMM_WORLD
[n27:05110] *** MPI_ERR_INTERN: internal error
[n27:05110] *** MPI_ERRORS_ARE_FATAL (goodbye)
1 process killed (possibly by Open MPI)
The code works without mca btl_tcp_if_exclude option.
Currently each node has two ethernet interfaces :
roch_at_n15 ~ > /usr/sbin/ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu
8232 index 1
inet 127.0.0.1 netmask ff000000
bge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
inet 192.168.12.15 netmask ffffff00 broadcast 192.168.12.255
bge1: flags=1004843<UP,BROADCAST,RUNNING,MULTICAST,DHCP,IPv4> mtu 1500
inet 192.168.11.15 netmask ffffff00 broadcast 192.168.11.255
The hostname of the nodes are nxx.
in /etc/hosts, nxx corresponds to the interface bge1; pxx to the
Thanks in advance for any help.