Re: [OMPI users] alltoallv

2017-10-11 Thread Peter Kjellström
On Tue, 10 Oct 2017 11:57:51 -0400 Michael Di Domenico wrote: > i'm getting stuck trying to run some fairly large IMB-MPI alltoall > tests under openmpi 2.0.2 on rhel 7.4 What is the IB stack used, just RHEL inbox? Do you run openmpi on the psm mtl for qlogic and openib

[OMPI users] alltoallv

2017-10-10 Thread Michael Di Domenico
i'm getting stuck trying to run some fairly large IMB-MPI alltoall tests under openmpi 2.0.2 on rhel 7.4 i have two different clusters, one running mellanox fdr10 and one running qlogic qdr if i issue mpirun -n 1024 ./IMB-MPI1 -npmin 1024 -iter 1 -mem 2.001 alltoallv the job just stalls after

Re: [OMPI users] AlltoallV (with some zero send count values)

2012-03-14 Thread Shamis, Pavel
> > Can anyone tell me whether it is legal to pass zero values for some of the > send count elements in an MPI_AlltoallV() call? I want to perform an > all-to-all operation but for performance reasons do not want to send data to > various ranks who don't need to receive any useful values. If

Re: [OMPI users] AlltoallV (with some zero send count values)

2012-03-09 Thread Jeffrey Squyres
On Mar 6, 2012, at 4:43 PM, Timothy Stitt wrote: > Can anyone tell me whether it is legal to pass zero values for some of the > send count elements in an MPI_AlltoallV() call? I want to perform an > all-to-all operation but for performance reasons do not want to send data to > various ranks

Re: [OMPI users] AlltoallV (with some zero send count values)

2012-03-06 Thread Timothy Stitt
Thanks Jed for the advice. How well-implemented are the one-sided communication routines? Are they something that could be trusted in a production code? Sent from my iPad On Mar 6, 2012, at 6:06 PM, "Jed Brown" > wrote: On Tue, Mar 6, 2012 at 15:43, Timothy

Re: [OMPI users] AlltoallV (with some zero send count values)

2012-03-06 Thread Jed Brown
On Tue, Mar 6, 2012 at 15:43, Timothy Stitt wrote: > Can anyone tell me whether it is legal to pass zero values for some of the > send count elements in an MPI_AlltoallV() call? I want to perform an > all-to-all operation but for performance reasons do not want to send

[OMPI users] AlltoallV (with some zero send count values)

2012-03-06 Thread Timothy Stitt
Hi all, Can anyone tell me whether it is legal to pass zero values for some of the send count elements in an MPI_AlltoallV() call? I want to perform an all-to-all operation but for performance reasons do not want to send data to various ranks who don't need to receive any useful values. If it