[mpich-discuss] Unexpected results

[Ken Miller]

Hello,

I am hoping someone might be able to point out what I am doing wrong. I have setup a Raspberry Pi cluster by going through a couple tutorials. The last step is to use MPI to test the cluster. Everything was going great until I ran the following command:

mpiexec -f machinefile -n 4 hostname

My machinefile contains the following:

pi at Pi01 ~/mpi_test $ cat machinefile
192.168.2.121
192.168.2.122
192.168.2.123
192.168.2.124

But, when I run the mpiexec command, I get the following error:

pi at Pi01 ~/mpi_test $ mpiexec -f machinefile -n 4 hostname
Pi01
[mpiexec at Pi01] control_cb (/home/pi/mpich2/mpich-3.1/src/pm/hydra/pm/pmiserv/pmiserv_cb.c:200): assert (!closed) failed
[mpiexec at Pi01] HYDT_dmxu_poll_wait_for_event (/home/pi/mpich2/mpich-3.1/src/pm/hydra/tools/demux/demux_poll.c:76): callback returned error status
[mpiexec at Pi01] HYD_pmci_wait_for_completion (/home/pi/mpich2/mpich-3.1/src/pm/hydra/pm/pmiserv/pmiserv_pmci.c:198): error waiting for event
[mpiexec at Pi01] main (/home/pi/mpich2/mpich-3.1/src/pm/hydra/ui/mpich/mpiexec.c:336): process manager error waiting for completion
pi at Pi01 ~/mpi_test $ 

Clearly, I am missing something. Would appreciate any help in advance.

Thanks.

Ken

ps. I am connected to the other Pis evident by the following ping results. I can also log into each of the other 3 Pis.

ping 192.168.2.122
PING 192.168.2.122 (192.168.2.122) 56(84) bytes of data.
64 bytes from 192.168.2.122: icmp_req=1 ttl=64 time=0.807 ms
64 bytes from 192.168.2.122: icmp_req=2 ttl=64 time=0.626 ms
64 bytes from 192.168.2.122: icmp_req=3 ttl=64 time=0.614 ms
64 bytes from 192.168.2.122: icmp_req=4 ttl=64 time=0.605 ms
64 bytes from 192.168.2.122: icmp_req=5 ttl=64 time=0.603 ms
^C
--- 192.168.2.122 ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4002ms
rtt min/avg/max/mdev = 0.603/0.651/0.807/0.078 ms
pi at Pi01 ~/mpi_test $ ping 192.168.2.123
PING 192.168.2.123 (192.168.2.123) 56(84) bytes of data.
64 bytes from 192.168.2.123: icmp_req=1 ttl=64 time=0.794 ms
64 bytes from 192.168.2.123: icmp_req=2 ttl=64 time=0.634 ms
64 bytes from 192.168.2.123: icmp_req=3 ttl=64 time=0.628 ms
64 bytes from 192.168.2.123: icmp_req=4 ttl=64 time=0.607 ms
^C
--- 192.168.2.123 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3003ms
rtt min/avg/max/mdev = 0.607/0.665/0.794/0.081 ms
pi at Pi01 ~/mpi_test $ ping 192.168.2.124
PING 192.168.2.124 (192.168.2.124) 56(84) bytes of data.
64 bytes from 192.168.2.124: icmp_req=1 ttl=64 time=0.787 ms
64 bytes from 192.168.2.124: icmp_req=2 ttl=64 time=0.632 ms
64 bytes from 192.168.2.124: icmp_req=3 ttl=64 time=0.612 ms
^C
--- 192.168.2.124 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 0.612/0.677/0.787/0.078 ms
pi at Pi01 ~/mpi_test $ 
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