Yes it works simply as mpiexec -n 4 hostname. Prints out Pi01 four times. Have the 4 Pis connected to a 5 port switch, going a 24 port switch and then Asus RT66N roter. MPICH installed is 3.1. Only downloaded and installed the one version. Thanks. Ken Sent from my iPad
On Apr 2, 2015, at 10:07 PM, Antonio J. Peña <[email protected]> wrote:
That should be fine. Let's start from the basics: does it work without the "-f machinefile" parameter? if it does, it means that you have some connection problem (e.g.: do you have a firewall installed?); otherwise, there's something wrong in the installation (e.g.: multiple MPI implementations installed).
BTW, which MPICH version are you using?
On 04/02/2015 08:52 PM, Ken Miller wrote: Antonio,
I can ssh without having to enter a password from: Pi01 to Pi02 Pi01 to Pi03 Pi01 to Pi04
Also from each Pi back to Pi01
However, I'm asked for a password from Pi04 to Pi03 and Pi02, etc.
Does that matter since I am running the mpiexec command from Pi01 only?
Thanks.
Ken
Sent from my iPad
On Apr 2, 2015, at 9:29 PM, Antonio J. Peña <[email protected]> wrote:
Well, I meant to suggest to actually check if that had the expected effects, so rephrasing what I said: can you check if you can ssh without being asked for a password to all nodes from all nodes, using exactly what you have in the host file (i.e.: ip addresses)?
On 04/02/2015 08:20 PM, Ken Miller wrote: Antonio,
Thanks for the quick response.
I did do the following on each of the other three Pis:
On Pi02: ssh-keygen cd .ssh cd id_rsa.pub pi02 scp 192.168.2.121:/home/pi/.ssh/p01 . cat pi01>>authorized_keys
and then I copied each from the other three Pis to Pi01 and cat those to the authorized_keys on Pi01
Is that what you are referring to?
If not, do you mind pointing me in the right direction?
Thanks in advance.
Ken
On Apr 2, 2015, at 9:09 PM, Antonio J. Peña <[email protected]> wrote:
Hi Ken,
Please check that you have password-less ssh connectivity between the nodes.
Best, Antonio
On 04/02/2015 07:33 PM, Ken Miller wrote: 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 [email protected] www.mcs.anl.gov/~apenya _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss
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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 [email protected] www.mcs.anl.gov/~apenya _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss
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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 [email protected] www.mcs.anl.gov/~apenya _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss
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