Maxsym,
can you please post your sbatch script ?
fwiw, i am unable to reproduce the issue with the latest v2.x from github.
by any chance, would you be able to test the latest openmpi 2.1.2rc3 ?
Cheers,
Gilles
On 9/8/2017 4:19 PM, Maksym Planeta wrote:
Indeed mpirun shows slots=1 per node, but I create allocation with
--ntasks-per-node 24, so I do have all cores of the node allocated.
When I use srun I can get all the cores.
On 09/07/2017 02:12 PM, r...@open-mpi.org wrote:
My best guess is that SLURM has only allocated 2 slots, and we respect the RM
regardless of what you say in the hostfile. You can check this by adding
--display-allocation to your cmd line. You probably need to tell slurm to
allocate more cpus/node.
On Sep 7, 2017, at 3:33 AM, Maksym Planeta <mplan...@os.inf.tu-dresden.de>
wrote:
Hello,
I'm trying to tell OpenMPI how many processes per node I want to use, but
mpirun seems to ignore the configuration I provide.
I create following hostfile:
$ cat hostfile.16
taurusi6344 slots=16
taurusi6348 slots=16
And then start the app as follows:
$ mpirun --display-map -machinefile hostfile.16 -np 2 hostname
Data for JOB [42099,1] offset 0
======================== JOB MAP ========================
Data for node: taurusi6344 Num slots: 1 Max slots: 0 Num procs: 1
Process OMPI jobid: [42099,1] App: 0 Process rank: 0 Bound: socket
0[core 0[hwt 0]], socket 0[core 1[hwt 0]], socket 0[core 2[hwt 0]], socket
0[core 3[hwt 0]], socket 0[core 4[hwt 0]], socket 0[core 5[hwt 0]], socket
0[core 6[hwt 0]], socket 0[core 7[hwt 0]], socket 0[core 8[hwt 0]], socket
0[core 9[hwt 0]], socket 0[core 10[hwt 0]], socket 0[core 11[hwt
0]]:[B/B/B/B/B/B/B/B/B/B/B/B][./././././././././././.]
Data for node: taurusi6348 Num slots: 1 Max slots: 0 Num procs: 1
Process OMPI jobid: [42099,1] App: 0 Process rank: 1 Bound: socket
0[core 0[hwt 0]], socket 0[core 1[hwt 0]], socket 0[core 2[hwt 0]], socket
0[core 3[hwt 0]], socket 0[core 4[hwt 0]], socket 0[core 5[hwt 0]], socket
0[core 6[hwt 0]], socket 0[core 7[hwt 0]], socket 0[core 8[hwt 0]], socket
0[core 9[hwt 0]], socket 0[core 10[hwt 0]], socket 0[core 11[hwt
0]]:[B/B/B/B/B/B/B/B/B/B/B/B][./././././././././././.]
=============================================================
taurusi6344
taurusi6348
If I put anything more than 2 in "-np 2", I get following error message:
$ mpirun --display-map -machinefile hostfile.16 -np 4 hostname
--------------------------------------------------------------------------
There are not enough slots available in the system to satisfy the 4 slots
that were requested by the application:
hostname
Either request fewer slots for your application, or make more slots available
for use.
--------------------------------------------------------------------------
The OpenMPI version is "mpirun (Open MPI) 2.1.0"
Also there is SLURM installed with version "slurm
16.05.7-Bull.1.1-20170512-1252"
Could you help me to enforce OpenMPI to respect slots paremeter?
--
Regards,
Maksym Planeta
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