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@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@Pi01 ~/mpi_test $ mpiexec -f machinefile -n 4 hostname

Pi01

[mpiexec@Pi01] control_cb (/home/pi/mpich2/mpich-3.1/src/pm/hydra/pm/pmiserv/pmiserv_cb.c:200): assert (!closed) failed

[mpiexec@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@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@Pi01] main (/home/pi/mpich2/mpich-3.1/src/pm/hydra/ui/mpich/mpiexec.c:336): process manager error waiting for completion

pi@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@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@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@Pi01 ~/mpi_test $ 

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-- 
Antonio J. Peña
Postdoctoral Appointee
Mathematics and Computer Science Division
Argonne National Laboratory
9700 South Cass Avenue, Bldg. 240, Of. 3148
Argonne, IL 60439-4847
apenya@mcs.anl.gov
www.mcs.anl.gov/~apenya