Hi,
I'm developing a causality chain tracking library and need a mechanism to
attach an extra data to every MPI message, so called piggyback mechanism.
As far as I know there are a few solutions to this problem from which the
two fundamental ones are the following:
- Dynamic datatype wrapping
Hi,
I got a "Too many open files" error while running over 1024 processes
on 512 cpus. I found the same error on
http://www.open-mpi.org/community/lists/users/2006/11/2216.php, but I
would like to know whether it is another solution instead of changing
limit descriptors. The limit descript
Hi,
does someone know whether there is a special requirement on the order of
spawning processes and the consequent merge of the intercommunicators?
I have two hosts, let's name them local and remote, and a parent process
on local that goes on spawning one process on each one of the two nodes.
Afte
Hi Rainer,
Thank you for your reply. Linux does not freeze. The one that freezes is
OpenMPI. Sorry for my unaccurate choice of words that led to confusion.
Therefore dmesg does not show anything abnormal (I attached to this email
a full dmesg log, captured when openmpi freezes).
When openmpi
Hello Jorge,
On Monday 29 October 2007 18:27, Jorge Parra wrote:
> When running openMPI my system freezes when initializing MPI (function
> MPI_init). This happens only when I try to run the process in multiples
> nodes in my cluster. Running multiple instances of the testing code
> locally (i.e ./
Hi folks, I have been seeing some
nasty behaviour in MPI_Send/Recv with large dataset(8 MB), when used with
OpenMP and Openmpi together with IB Interconnect. Attached is a
program. The code first calls MPI_Init_thread()
followed by openmp thread creation API. The program works fine
