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]
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
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
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
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
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
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
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
