Re: [OMPI users] Can't run with more than two nodes in the hostfile

Forgive me, but I am now fully confused - case 1 and case 3 appear identical to me, except for the debug-daemons flag on case 3. On Jul 15, 2014, at 7:56 AM, Ricardo Fernández-Perea wrote: > What I mean with "another mpi process". > I have 4 nodes where there is process that use mpi and whe

Re: [OMPI users] Running OSU benchmark latency test with Open MPI version 1.6.5 and version 1.8.1

Hi Na Zhang, It seems likely that on your Open MPI 1.8.1 run that you have the 2 ranks running on one host whereas on the 1.6.5 results they are running on 2 hosts. You should be able to verify that by running top on one of the nodes during the 1.8.1 runs and see if you have 2 or 0 osu_latency

[OMPI users] mpi and open-mpi newbie question - connect btl choices

Hi, I'm new to mpi and open-mpi. All in the same day is testing me. My thought is to compare openmpi to shared mem for ad-hoc inter-process channels on the same machine. I've created a couple of little examples of a publisher and subscriber using MPI_Comm_accept and MPI_Comm_connect. (Ubuntu 1

Re: [OMPI users] Running OSU benchmark latency test with Open MPI version 1.6.5 and version 1.8.1

Forgot to add the config info about the tests in previous post. We have FDR IB, two nodes (HP DL 380 G8 sever) communicating through a Mellanox Switch, RDMA mode, hyperthreading enabled. Thanks, Na Zhang On Tue, Jul 15, 2014 at 12:00 PM, Na Zhang wrote: > Dear developers and users, > > I am t

[OMPI users] Running OSU benchmark latency test with Open MPI version 1.6.5 and version 1.8.1

Dear developers and users, I am trying to run OSU benchmark tests (like osu_latency, osu_bw, etc) with Open MPI. While I was able to run the tests with both versions (1.6.5, 1.8.1, same default build), I got disparate performance results. Please see data below. I wonder what reason would cause th

Re: [OMPI users] Can't run with more than two nodes in the hostfile

What I mean with "another mpi process". I have 4 nodes where there is process that use mpi and where initiated using mpirun from the control node already running when I run the command against any of those nodes it execute but when I do it against any other node it fails if no_tree_spawn flag

Re: [OMPI users] Can't run with more than two nodes in the hostfile

I'm afraid I don't understand your comment about "another mpi process". Looking at your output, it would appear that there is something going on with host nexus17. In both cases, mpirun is launching a single daemon onto only one other node - the only difference was in the node being used. The "n

Re: [OMPI users] Can't run with more than two nodes in the hostfile

I have try if another mpi process is running in the node already the process run $ricardo$ /opt/openmpi/bin/mpirun --mca plm_rsh_no_tree_spawn 1 -mca plm_base_verbose 10 -host nexus16 ompi_info [nexus10.nlroc:27397] mca: base: components_register: registering plm components [nexus10.nlroc:27397]