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--- strutture:cnaf:clusterhpc:using_the_cnaf_hpc_cluster [2017/07/04 11:06]
dcesini@infn.it [Requesting Access]
+++ strutture:cnaf:clusterhpc:using_the_cnaf_hpc_cluster [2021/03/05 14:54] (current)
dcesini@infn.it [Alternative MPI multinode submission]
@@ Line 126: / Line 126: @@
 </code>
-==== Submitting MPI Jobs ====
+==== Submitting MPI Jobs via mpirun.lsf (obsolete)====
 Currently only **OpenMPI** jobs have been tested on the HPC cluster. \\
@@ Line 187: / Line 187: @@
 (Thanks to S.Sinigardi for sharing it)\\
+==== Alternative MPI multinode submission ====
+It is possible to avoid the usage of mpirun.lsf and dinamically set the mpirun machine file in the following way:
+) Create automatically the machine file to be using in the mpirun:
+    echo $LSB_HOSTS | awk '{split($0,array," ")} END {for (i in array) printf ("%s\n",array[i])}' | awk '{count[$0]++} END {for (word in count) print word,"slots=" count[word]}' > /home/HPC/username/mymachine.txt
+) Use this command to launch mpirun:
+    mpirun --machinefile /home/HPC/username/machinefile.txt -x PSM_SHAREDCONTEXTS_MAX=8 -np $LSB_DJOB_NUMPROC /home/HPC/username/executablename
+A possible bsub submission is:
+    bsub -q hpc_inf_SL7  -n 16 -R "span[ptile=8]" -o testmpimy.out -e testmpimy.err /home/HPC/username/run_this_example.sh
+where in the run_this_example.sh script you launch the previous commands:
+----run_this_example.sh----
+    #!/bin/bash
+    echo $LSB_HOSTS | awk '{split($0,array," ")} END {for (i in array) printf ("%s\n",array[i])}' | awk '{count[$0]++} END {for (word in count) print word,"slots=" count[word]}' > /home/HPC/username/mymachine.txt
+    mpirun --machinefile /home/HPC/username/machinefile.txt -x PSM_SHAREDCONTEXTS_MAX=8 -np $LSB_DJOB_NUMPROC /home/HPC/username/executablename
 ==== Submitting GPU Jobs ====

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