Hello Terry,
Thank you very much for your help.
Sofia,
I took your program and actually ran it successfully on my systems using
Open MPI r19400. A couple questions:
1. Have you tried to run the program on a single node?
mpirun -np 2 --host 10.4.5.123 --prefix /usr/local
./PruebaSumaParalela.out
Yes. In this case, the program works perfectly.
2. Can you try and run the code the following way and is the output
different?
mpirun -np 2 --host 10.4.5.123,edu@10.4.5.126 --mca mpi_preconnect_all
1 --prefix /usr/local ./PruebaSumaParalela.out
The program also hangs but the output is different. In both computers I get
the following:
Inicio
Inicio
totalnodes:2
mynode:0
Inicio Recv
3. When the program hangs can you attach a debugger to one of the
processes and print out a stack?
I do not know how to do that.
4. What version of Open MPI are you using, on what type of machine, using
which OS?
Openmpi-1.2.2 in both computers
In 10.4.5.123 I have:
Ubuntu Linux pichurra 2.6.22-15-generic #1 SMP Tue Jun 10 09:21:34 UTC 2008
i686 GNU/Linux
In edu@10.4.5.126 I have:
K-Ubuntu Linux hp1-Linux 2.6.20-16-generic #2 SMP Sun Sep 23 19:50:39 UTC
2007 i686 GNU/Linux
Sofia
----- Original Message -----
From: "Terry Dontje" <terry.don...@sun.com>
To: <us...@open-mpi.org>
Sent: Wednesday, September 17, 2008 1:24 PM
Subject: Re: [OMPI users] Problem with MPI_Send and MPI_Recv
Sofia,
I took your program and actually ran it successfully on my systems using
Open MPI r19400. A couple questions:
1. Have you tried to run the program on a single node?
mpirun -np 2 --host 10.4.5.123 --prefix /usr/local
./PruebaSumaParalela.out
2. Can you try and run the code the following way and is the output
different?
mpirun -np 2 --host 10.4.5.123,edu@10.4.5.126 --mca mpi_preconnect_all
1 --prefix /usr/local ./PruebaSumaParalela.out
3. When the program hangs can you attach a debugger to one of the
processes and print out a stack?
4. What version of Open MPI are you using, on what type of machine, using
which OS?
--td
Date: Tue, 16 Sep 2008 18:15:59 +0200
From: "Sofia Aparicio Secanellas" <sapari...@grpss.ssr.upm.es>
Subject: [OMPI users] Problem with MPI_Send and MPI_Recv
To: <us...@open-mpi.org>
Message-ID: <D99B2E131E0640C9A2A4D8A0FD2472A5@aparicio1>
Content-Type: text/plain; charset="iso-8859-1"
Hello,
I am new using MPI. I want to run a simple program (I enclose the
program) in 2 different computers. I have installed MPI in both
computers. I have compiled the program using:
mpiCC -o PruebaSumaParalela.out PruebaSumaParalela.cpp
I have copied the executable PruebaSumaParalela.out to my /home directoy
in both computers. Then I run:
mpirun -np 2 --host 10.4.5.123,edu@10.4.5.126 --prefix /usr/local
./PruebaSumaParalela.out
The 10.4.5.123 computer prints:
Inicio
Inicio
totalnodes:2
mynode:0
Inicio Recv
totalnodes:2
mynode:1
Inicio Send
sum:375250
The edu@10.4.5.126 computer prints:
Inicio
Inicio
totalnodes:2
mynode:1
Inicio Send
sum:375250
totalnodes:2
mynode:0
Inicio Recv
But the program does not finish on any computer. It seems that the Send
and Recv does not work. Master computer is waiting to receive something
that the slave does not send.
Do you know what the problem could be ?
Thank you very much.
Sofia
No virus found in this outgoing message
Checked by PC Tools AntiVirus (4.0.0.26 - 10.100.007).
http://www.pctools.com/free-antivirus/
-------------- next part --------------
HTML attachment scrubbed and removed
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: PruebaSumaParalela.cpp
URL:
<http://www.open-mpi.org/MailArchives/users/attachments/20080916/d19b7a37/attachment.ksh>
------------------------------
_______________________________________________
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users
No virus found in this incoming message
Checked by PC Tools AntiVirus (4.0.0.26 - 10.100.007).
http://www.pctools.com/free-antivirus/
No virus found in this outgoing message
Checked by PC Tools AntiVirus (4.0.0.26 - 10.100.007).
http://www.pctools.com/free-antivirus/
