Hello George,
Thanks for your messages. Yes i disconnect my different worlds before
calling MPI_Finalize().
Bernard
George Bosilca a écrit :
I was somehow confused when I wrote my last email and I mixed up the
MPI versions (thanks to Dick Treumann for gently pointing me to the
truth). Before MPI 2.1, the MPI Standard was unclear how the
MPI_Finalize should behave in the context of spawned or joined worlds,
which make the disconnect+finalize the only safe and portable way to
correctly finalize all processes connected. However, the MPI 2.1 had
clarified this point, and now MPI_Finalize is collective over all
connected processes (for a definition of connected processes please
see the MPI 2.1 10.5 page 318).
However, if you really want to write a portable MPI application, I
suggest to use the disconnect+finalize, at least until all MPI
libraries available are 2.1 compliant.
Open MPI 1.3 version was supposed to be 2.1 compliant, so I guess I'll
have to create a new bug report for this.
Thanks,
george.
On Jan 23, 2009, at 10:02 , George Bosilca wrote:
I don't know what your program is doing but I kind of guess what the =
problem is. If you use MPI 2 dynamics to spawn or connect two =
MPI_COMM_WORLD you have to disconnect them before calling =
MPI_Finalize. The reason is that an MPI_Finalize do the opposite of
an =
MPI_Init, so it is MPI_COMM_WORLD based. Make sure your different =
world are disconnected before doing the MPI_Finalize should solve the =
problem.
george.
On Jan 23, 2009, at 06:00 , Bernard Secher - SFME/LGLS wrote:
No i didn't run this program whith Open-MPI 1.2.X because one said =
to me there were many changes between 1.2.X version and 1.3 version =
about MPI_publish_name, MPI_Lookup_name (new ompi-server, ...), and =
it was better to use 1.3 version.
Yes i am sure all processes reach MPI_Finalize() function because i =
write message just before (it is the END_OF macro in my program), =
and i am sure all processes are locked in MPI_Finalize() function =
beacause i write message just after (it is the MESSAGE macro).
May be all MPI_Sends are not matched by corresponding MPI_Recvs,... =
It can be a possibility.
Thanks
Bernard
jody a =E9crit :
Hi Bernard
The structure looks as far as i can see.
Did it run OK on Open-MPI 1.2.X?
So are you sure all processes reach the MPI_Finalize command?
Usually MPI_Finalize only completes when all processes reach it.
I think you should also make sure that all MPI_Sends are matched by
corresponding MPI_Recvs.
Jody
On Fri, Jan 23, 2009 at 11:08 AM, Bernard Secher - SFME/LGLS
<bernard.sec...@cea.fr> wrote:
Thanks Jody for your answer.
I launch 2 instances of my program on 2 processes each instance, =
on the same
machine.
I use MPI_Publish_name, MPI_Lookup_name to create a global =
communicator on
the 4 processes.
Then the 4 processes exchange data.
The main program is a CORBA server. I send you this program.
Bernard
jody a =E9crit :
For instance:
- how many processes on how many machines,
- what kind of computation
- perhaps minimal code which reproduces this failing
- configuration settings, etc.
See: http://www.open-mpi.org/community/help/
Without any information except for "it doesn't work",
nobody can give you any help whatsoever.
Jody
On Fri, Jan 23, 2009 at 9:33 AM, Bernard Secher - SFME/LGLS
<bernard.sec...@cea.fr> wrote:
Hello Jeff,
I don't understand what you mean by "A _detailed_ description of =
what is
failing".
The problem is a dead lock in MPI_Finalize() function. All =
processes are
blocked in this MPI_Finalize() function.
Bernard
Jeff Squyres a =E9crit :
Per this note on the "getting help" page, we still need the =
following:
"A _detailed_ description of what is failing. The more details =
that you
provide, the better. E-mails saying "My application doesn't work!" =
will
inevitably be answered with requests for more information about =
exactly what
doesn't work; so please include as much information detailed in =
your initial
e-mail as possible."
Additionally:
"The best way to get help is to provide a "recipie" for =
reproducing the
problem."
Thanks!
On Jan 22, 2009, at 8:53 AM, Bernard Secher - SFME/LGLS wrote:
Hello Tim,
I send you the information in join files.
Bernard
Tim Mattox a =E9crit :
Can you send all the information listed here:
http://www.open-mpi.org/community/help/
On Wed, Jan 21, 2009 at 8:58 AM, Bernard Secher - SFME/LGLS
<bernard.sec...@cea.fr> wrote:
Hello,
I have a case wher i have a dead lock in MPI_Finalize() function =
with
openMPI v1.3.
Can some body help me please?
Bernard
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