Hi all,
I am currently working on a multi-threaded hybrid parallel simulation
which uses both pthreads and OpenMPI. The simulation uses several
pthreads per MPI node.
My code uses the nonblocking routines MPI_Isend/MPI_Irecv/MPI_Waitany
quite successfully to implement the node-to-node communicat
Short update:
I just installed version 1.4.4 from source (compiled with
--enable-mpi-threads), and the problem persists.
I should also point out that if, in thread (ii), I wait for the
nonblocking communication in thread (i) to finish, nothing bad happens.
But this makes the nonblocking communic
Sorry for the delay in replying.
Unfortunately, the "uninitialized values" kinds of warnings from valgrind are
to be expected when using the OFED stack. Specifically, a bunch of memory in
an OMPI process comes directly from OS-bypass kinds of mechanisms, which
effectively translates into val
Thanks for all your suggestions.
Yes, indeed what I'm trying to do is execute a serial program. All the
documentation you mention was pretty useful.
I have another question, if mpirun launches several copies of the program on
the different hosts, does it mean that I must have a copy of the program
On Oct 20, 2011, at 10:33 AM, Jorge Jaramillo wrote:
> Thanks for all your suggestions.
>
> Yes, indeed what I'm trying to do is execute a serial program. All the
> documentation you mention was pretty useful.
> I have another question, if mpirun launches several copies of the program on
> the
Dear Jeff,
thanks for replying and for providing MPI implementation details. As you say,
the possible problem is a subtle memory bug.
In our code, MPI communications are limited to a few subroutines named
cutman_ and sharing a similar structure involving a possibile large number
(1000 or
Hi Jorge
Aha! A serial executable. I guessed it right! :)
But Ralph certainly came up with the simpler solution: use mpirun.
As for the other question:
If you are using Torque/PBS to launch the job,
put this line in your PBS script:
cd $PBS_O_WORKDIR
which will put you in the work director
