Cluster Grid

Debugging MPI applications using Totalview

Running this debugger requires remote X acces. For this, familiarize yourself to this article. (Remote display on Cluster nodes).

Another article would be running MPI applications on the NCIT cluster and Debugging simple applications using Totalview.

Quicksteps:

Debugging MPI applications with totalview is simmilar to running simple debug with Totalview. You must only add -tv to mpirun, or you cand run totalview directly and select a Parallel job execution. (see user manual).

[alexandru.herisanu@fep-53-3 mpi]$ cat debug.sh
#!/bin/bash

module load compilers/gcc-4.1.2
module load mpi/openmpi-1.3.2_gcc-4.1.2
module load debuggers/totalview-8.4.1-7
setenv DISPLAY fep-53-3.grid.pub.ro:1000.0

# You can ask mpirun to start TotalView
#mpirun -np $NSLOTS -tv ./mpi_scatter

# or you can run it yourself, but now you have $NSLOTS available.

#You can use your own public/private key authentication or

#Sun Grid Engine's rsh

totalview

-----

[alexandru.herisanu@fep-53-3 mpi]$ qsub -q ibm-quad.q -pe openmpi 4 -cwd debug.sh
Your job 16 ("debug.sh") has been submitted