<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Antonio,<div><br></div><div>Thanks for the quick response.</div><div><br></div><div>I did do the following on each of the other three Pis:</div><div><br></div><div>On Pi02:</div><div>ssh-keygen</div><div>cd .ssh</div><div>cd id_rsa.pub pi02</div><div>scp 192.168.2.121:/home/pi/.ssh/p01 .</div><div>cat pi01>>authorized_keys</div><div><br></div><div>and then I copied each from the other three Pis to Pi01 and cat those to the authorized_keys on Pi01</div><div><br></div><div>Is that what you are referring to?</div><div><br></div><div>If not, do you mind pointing me in the right direction?</div><div><br></div><div>Thanks in advance.</div><div><br></div><div>Ken</div><div><br></div><div><div><div>On Apr 2, 2015, at 9:09 PM, Antonio J. Peņa <<a href="mailto:apenya@mcs.anl.gov">apenya@mcs.anl.gov</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
<div text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix"><br>
Hi Ken,<br>
<br>
Please check that you have password-less ssh connectivity between
the nodes.<br>
<br>
Best,<br>
Antonio<br>
<br>
<br>
On 04/02/2015 07:33 PM, Ken Miller wrote:<br>
</div>
<blockquote cite="mid:B9583627-EF54-49E4-AEA4-FD4F3FC874E5@gmail.com" type="cite">
Hello,
<div><br>
</div>
<div>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:</div>
<div><br>
</div>
<div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;">mpiexec
-f machinefile -n 4 hostname</div>
</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;"><br>
</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;">My
machinefile contains the following:</div>
<div style="margin: 0px; font-size: 11px; font-family: Menlo;"><br>
</div>
<div style="margin: 0px;">
<div style="font-family: Menlo; font-size: 11px; margin: 0px;"><span style="color: #34bd26"><b>pi@Pi01</b></span> <span style="color: #5330e1"><b>~/mpi_test $</b></span> cat
machinefile</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">192.168.2.121</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">192.168.2.122</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">192.168.2.123</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">192.168.2.124</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;"><br>
</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">But,
when I run the mpiexec command, I get the following error:</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;"><br>
</div>
<div style="margin: 0px;">
<div style="font-family: Menlo; font-size: 11px; margin: 0px;"><span style="color: #34bd26"><b>pi@Pi01</b></span> <span style="color: #5330e1"><b>~/mpi_test $</b></span> mpiexec
-f machinefile -n 4 hostname</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">Pi01</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">[mpiexec@Pi01]
control_cb
(/home/pi/mpich2/mpich-3.1/src/pm/hydra/pm/pmiserv/pmiserv_cb.c:200):
assert (!closed) failed</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">[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</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">[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</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;">[mpiexec@Pi01]
main
(/home/pi/mpich2/mpich-3.1/src/pm/hydra/ui/mpich/mpiexec.c:336):
process manager error waiting for completion</div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;
color: rgb(83, 48, 225);"><span style="color: #34bd26"><b>pi@Pi01</b></span><span style=""> </span><b>~/mpi_test $</b><span style=""> </span></div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;
color: rgb(83, 48, 225);"><span style=""><br>
</span></div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;
color: rgb(83, 48, 225);"><span style="">Clearly,
I am missing something. Would appreciate any help in
advance.</span></div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;
color: rgb(83, 48, 225);"><span style=""><br>
</span></div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;
color: rgb(83, 48, 225);"><span style="">Thanks.</span></div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;
color: rgb(83, 48, 225);"><span style=""><br>
</span></div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;
color: rgb(83, 48, 225);"><span style="">Ken</span></div>
<div style="font-family: Menlo; font-size: 11px; margin: 0px;
color: rgb(83, 48, 225);"><span style=""><br>
</span></div>
<div style="margin: 0px;"><font face="Menlo"><span style="font-size: 11px;">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.</span></font></div>
<div style="margin: 0px;"><font face="Menlo"><span style="font-size: 11px;"><br>
</span></font></div>
<div style="margin: 0px;">
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">ping 192.168.2.122</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">PING 192.168.2.122 (192.168.2.122) 56(84) bytes of
data.</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.122: icmp_req=1 ttl=64
time=0.807 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.122: icmp_req=2 ttl=64
time=0.626 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.122: icmp_req=3 ttl=64
time=0.614 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.122: icmp_req=4 ttl=64
time=0.605 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.122: icmp_req=5 ttl=64
time=0.603 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">^C</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">--- 192.168.2.122 ping statistics ---</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">5 packets transmitted, 5 received, 0% packet loss,
time 4002ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">rtt min/avg/max/mdev = 0.603/0.651/0.807/0.078 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;"><span style="color: #34bd26"><b>pi@Pi01</b></span>
<span style="color: #5330e1"><b>~/mpi_test $</b></span>
ping 192.168.2.123</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">PING 192.168.2.123 (192.168.2.123) 56(84) bytes of
data.</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.123: icmp_req=1 ttl=64
time=0.794 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.123: icmp_req=2 ttl=64
time=0.634 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.123: icmp_req=3 ttl=64
time=0.628 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.123: icmp_req=4 ttl=64
time=0.607 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">^C</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">--- 192.168.2.123 ping statistics ---</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">4 packets transmitted, 4 received, 0% packet loss,
time 3003ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">rtt min/avg/max/mdev = 0.607/0.665/0.794/0.081 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;"><span style="color: #34bd26"><b>pi@Pi01</b></span>
<span style="color: #5330e1"><b>~/mpi_test $</b></span>
ping 192.168.2.124</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">PING 192.168.2.124 (192.168.2.124) 56(84) bytes of
data.</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.124: icmp_req=1 ttl=64
time=0.787 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.124: icmp_req=2 ttl=64
time=0.632 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">64 bytes from 192.168.2.124: icmp_req=3 ttl=64
time=0.612 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">^C</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">--- 192.168.2.124 ping statistics ---</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">3 packets transmitted, 3 received, 0% packet loss,
time 2002ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo;">rtt min/avg/max/mdev = 0.612/0.677/0.787/0.078 ms</div>
<div style="margin: 0px; font-size: 11px; font-family:
Menlo; color: rgb(83, 48, 225);"><span style="color:
#34bd26"><b>pi@Pi01</b></span><span style=""> </span><b>~/mpi_test $</b><span style=""> </span></div>
</div>
</div>
</div>
<br>
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<br>
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<br>
<pre class="moz-signature" cols="72">--
Antonio J. Peņa
Postdoctoral Appointee
Mathematics and Computer Science Division
Argonne National Laboratory
9700 South Cass Avenue, Bldg. 240, Of. 3148
Argonne, IL 60439-4847
<a class="moz-txt-link-abbreviated" href="mailto:apenya@mcs.anl.gov">apenya@mcs.anl.gov</a>
<a class="moz-txt-link-abbreviated" href="http://www.mcs.anl.gov/~apenya">www.mcs.anl.gov/~apenya</a></pre>
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