Hello Sofia,
After further reflection I wonder if you have a firewall that is
preventing connections to certain ports.
--td
Terry Dontje wrote:
Hello Sofia,
Ok, so I really wanted the stack of when you run with "-mca
mpi_preconnect_all 1" I believe you'll see that one of the processes
will be in init. However, the stack still probably will not help me
help you. What needs to happen is to step through the code in dbx
while the connection is trying to be established. I am hoping you
might find the connect call fails or that we've been given an
interface that somehow cannot reach the other node. However, when you
specified "-mca btl_tcp_if_include eth1" that should have forced
things to use the interface you need. So it really comes down to why
are we not connecting to the eth1 address? Are we failing on routing
to that address or is the connect failing because we are trying to use
a port that we are not really allowed to use or is it something else?
I don't think it is a routing problem since you are able to reach each
node via ssh. Is there someone else on the list that might want to
lend a hand here? I feel like I am missing something obvious going on
here.
--td
Date: Fri, 19 Sep 2008 16:09:11 +0200
From: "Sofia Aparicio Secanellas" <sapari...@grpss.ssr.upm.es>
Subject: Re: [OMPI users] Problem with MPI_Send and MPI_Recv
To: "Open MPI Users" <us...@open-mpi.org>
Message-ID: <1BBF50FE29F743B5829CC3785F47CADD@aparicio1>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
Hello Terry,
I have installed 1.2.7 and I obtain the same result.
I will explain you what I have done.
1. On my computer edu@10.1.10.240 I have added a new user called
sofia. This way I have sofia@10.1.10.208 and sofia@10.1.10.240.
2. I have downloaded the openmpi 1.2.7 from the openmpi website on
both computers in /home/sofia/Desktop.
3. I have installed everything using "sudo ./configure", "sudo make"
and "sudo make install".
4. To make ssh not ask me for a password. I have typed in
sofia@10.1.10.208 "ssh-keygen -t dsa", "cd $HOME/.ssh" and "cp
id_dsa.pub authorized_keys". I have copied the directory
"/home/sofia/.ssh" from sofia@10.1.10.208 to /home/sofia/.ssh in
sofia@10.1.10.240. The ssh command without password works on
computer sofia@10.1.10.208 but computer sofia@10.1.10.208 ask me for
a passphrase and for the password. Is it normal?
5. I have created a directory "/home/sofia/programasparalelos" on
both computers and I have given permissions to the directory with
"chmod 777".
6. I have copied on both computers in
"/home/sofia/programasparalelos" the program "PruebaSumaParalela.c"
(I have changed a little bit the program, I enclose you the new
program) and I have compiled using "mpicc PruebaSumaParalela.c -o
PruebaSumaParalela.out".
7. Now I run the program on both computersusing the command:
mpirun -np2 --host 10.1.10.208,10.1.10.240 --prefix /usr/local
./PruebaSumaParalela.out
When I run the program I obtain 3 PIDs executing on every computer,
2 of "./PruebaSumaParalela.out" and 1 of "mpirun -np2 --host
10.1.10.208,10.1.10.240 --prefix /usr/local
./PruebaSumaParalela.out". I enclose you the results obtained on
every computer for every "./PruebaSumaParalela.out".
Thank you very much.
Sofia
