[OMPI users] MPI_COMM_split hanging

I am attempting to split my application into multiple master+workers groups using MPI_COMM_split. My MPI revision is shown as: mpirun --tag-output ompi_info -v ompi full --parsable [1,0]:package:Open MPI root@build-x86-64 Distribution [1,0]:ompi:version:full:1.4.3 [1,0]:ompi:version:svn:r23834 [1

Re: [OMPI users] MPI_Allgather problem

I guess your output is from different ranks. YOu can add rank infor inside print to tell like follows: (void) printf("rank %d: gathered[%d].node = %d\n", rank, i, gathered[i].node); >From my side, I did not see anything wrong from your code in Open MPI 1.4.3. after I add rank, the output is ran

[OMPI users] MPI_Allgather problem

Dear all, I have not used OpenMPI much before, but am maintaining a large legacy application. We noticed a bug to do with a call to MPI_Allgather as summarised in this post to Stackoverflow: http://stackoverflow.com/questions/8445398/mpi-allgather-produces-inconsistent-results In the process of l

[OMPI users] mca_btl_sm_component_progress read an unknown type of header

Hi all, This question was buried in an earlier question, and I got no replies, so I'll try reposting it with a more enticing subject. I have a multithreaded openmpi code where each task has N+1 threads, the N threads send nonblocking messages that are received by the 1 thread on the other tasks.

Re: [OMPI users] Asymmetric performance with nonblocking, multithreaded communications

Hi Yiannis, On Fri, Dec 9, 2011 at 10:21 AM, Yiannis Papadopoulos wrote: > Patrik Jonsson wrote: >> >> Hi all, >> >> I'm seeing performance issues I don't understand in my multithreaded >> MPI code, and I was hoping someone could shed some light on this. >> >> The code structure is as follows: A

Re: [OMPI users] Asymmetric performance with nonblocking, multithreaded communications

Patrik Jonsson wrote: Hi all, I'm seeing performance issues I don't understand in my multithreaded MPI code, and I was hoping someone could shed some light on this. The code structure is as follows: A computational domain is decomposed into MPI tasks. Each MPI task has a "master thread" that re

Re: [OMPI users] Cofigure(?) problem building /1.5.3 on ScientificLinux6.0

Hello Gus, Ralph, Jeff a very late answer for this - just found it in my mailbox. Would "cp -rp" help? (To preserve time stamps, instead of "cp -r".) Yes, the root of the evil were the time stamps. 'cp -a' is the magic wand. Many thanks for your help, and I should wear sackcloth and ashes..

Re: [OMPI users] Program hangs in mpi_bcast

Dear Jeff, thanks so much for your detailed reply and explanations and sorry for not answering sooner. I'll try to develop reproducer and I have some ideas how this can be done. At least I know typical scenarios causing this issue to appear. To be honest, I'm rather busy these days (as probabl