Update... Problem of all processes runing on first node (oversubscribed
dual-core machine) is NOT resolved.
Changing the mpirun command in the Torque batch script ("pbs_hello" - See
previous) to
mpirun --nooversubscribe --display-allocation hostname
Then submitting to PBS/Torque using
qsub -l nodes=5:ppn=1:dualcore pbs_hello
To run on 5 dual-core machines. Produces the following result...
=======8<--------CUT HERE----------
PBS Job Number 8996
PBS batch run on node21.emperor
Time it was started 2017-10-03_13:04:07
Current Directory /net/shrek.emperor/home/shrek/anthony
Submitted work dir /home/shrek/anthony/mpi-pbs
Number of Nodes 5
Nodefile List /var/lib/torque/aux//8996.shrek.emperor
node21.emperor
node25.emperor
node24.emperor
node23.emperor
node22.emperor
---------------------------------------
====================== ALLOCATED NODES ======================
node21: slots=1 max_slots=0 slots_inuse=0 state=UP
node25.emperor: slots=1 max_slots=0 slots_inuse=0 state=UP
node24.emperor: slots=1 max_slots=0 slots_inuse=0 state=UP
node23.emperor: slots=1 max_slots=0 slots_inuse=0 state=UP
node22.emperor: slots=1 max_slots=0 slots_inuse=0 state=UP
=================================================================
node21.emperor
node21.emperor
node21.emperor
node21.emperor
node21.emperor
=======8<--------CUT HERE----------
The $PBS_NODE file shows torque requesting 5 processes on 5 separate
machines.
The mpirun command's "ALLOCATED NODES" shows it picked up the request
correctly from torque.
But the "hostname" output still shows ALL processes were run on the first
node only!
Even though I requested it not to over subscribe.
I am at a complete loss as to how to solve this problem..
ANY and all suggestions, or even ways I can get other information as to
what is causing this will be most welcome.
Anthony Thyssen ( System Programmer ) <a.thys...@griffith.edu.au>
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