On Jun 14, 2012, at 8:43 PM, Ramesh Vinayagam wrote:
> I was wondering is there a way to communicate between two processes with two
> different communicators simultaneously in MPI? Like having two channels for
> communication?
I'm not quite sure what you're asking. Are you asking if it's possi
There's nothing that says that your daemons have to be MPI processes. They
could be proper system-level daemons that live "forever", for example. You
might not be able to speak to them via MPI easily (e.g., you may need to use
TCP sockets or some other network transport), but this is fairly co
On Jun 13, 2012, at 10:35 AM, Filippo Donida wrote:
> My idea is to have a thread to be launched just after the MPI_Isend call with
> a fake MPI_Test function call, just to make the sending operation
> progressing.
Sorry for jumping in late (usual disclaimer about my INBOX being a disaster...)
On Jun 11, 2012, at 7:48 PM, Yong Qin wrote:
> ah, I guess my original understanding of PML was wrong. Adding "-mca
> pml ob1" does help to ease the problem.
See the README for a little more discussion about this issue. There can only
be 1 PML in use by a given MPI job -- using "--mca pml ob1"
Were there any clues in /var/log/messages or dmesg?
You might also want to check out this IBM writeup about some Mellanox
parameters:
http://www.ibm.com/developerworks/wikis/display/hpccentral/Using+RDMA+with+pagepool+larger+than+8GB
That IBM server seems to be misbehaving right now (500/intern
On Jun 15, 2012, at 8:02 AM, Jeff Squyres wrote:
> Were there any clues in /var/log/messages or dmesg?
>
Thanks. I found a suggestion from Nathan Hjelm to add "options mlx4_core
log_mtts_per_seg=X" (where X is 5 in my case).
Offline suggestions (which also included that) were also add "--mc
Hi Marcus
Sounds like you might be running out of IB resources as opposed to main memory
- not much we can suggest there other than trying to set queue sizes, which is
a complicated option. You might look at "ompi_info --param btl openib" and see
if adjusting some of those helps.
Ralph
On Ju
On Jun 15, 2012, at 11:26 AM, Daniels, Marcus G wrote:
>> Were there any clues in /var/log/messages or dmesg?
>
> Thanks. I found a suggestion from Nathan Hjelm to add "options mlx4_core
> log_mtts_per_seg=X" (where X is 5 in my case).
> Offline suggestions (which also included that) were als
Hi Damien,
I installed MS Visual Studio 2010 and tried the whole procedure again
and it worked!
That's the great news.
Now the bad news is that I'm trying to run the program again using
mpiexec and it won't!
I get these error messages:
orte_rml_base_select failed
orte_ess_set_name fail
Hmmm. Two things. Can you run helloworldMPI.exe on it's own? It
should output "Number of threads = 1, My rank = 0"
Also, can you post the output of ompi_info ? I think you might still
have some path mixups. A successful OpenMPI build with this simple
program should just work.
If you sti
Just figured it out.
The only thing different from when it ran yesterday to today was I was
connected to a network. So I connected my laptop to a network and it
worked again.
Thanks for all your help, Damien!
I'm sure I'm gonna get stuck more along the way so hoping you can help.
--
Vima
OK, that's what orte_rml_base_select failed means, no TCP connection.
But you should be able to make OpenMPI & mpiexec work without a network
if you're just running in local memory. There's probably a runtime
parameter to set but I don't know what it is. Maybe Jeff or Shiqing can
weigh in wi
Thanks Jeff,
I was looking more into this scenario :
if (rank ==0){
MPI_Send(&tmp,2048, MPI_INT, 1,123, myComm);
MPI_Recv(&tmp2,2048, MPI_INT, 1,321,
MPI_COMM_WORLD, MPI_STATUS_IGNORE);
}
if (rank == 1){
MPI_Send(&tmp1,2048, MPI_INT, 0,321, MPI_COMM_WO
On Jun 15, 2012, at 4:38 PM, Ramesh Vinayagam wrote:
> I was looking more into this scenario :
>
> if (rank ==0){
> MPI_Send(&tmp,2048, MPI_INT, 1,123, myComm);
> MPI_Recv(&tmp2,2048, MPI_INT, 1,321,
> MPI_COMM_WORLD, MPI_STATUS_IGNORE);
> }
> if (rank == 1){
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