result

pp12821@marfim:~/python$ ladalloc -c atlantica -n 2 -t 60 -e
/usr/local/torque-2.5.11/bin/qsub -I -V -d /home/pp12821/python -l nodes=2:cluster-Atlantica:ppn=16,walltime=00:60:00
qsub: waiting for job 57322.marfim.lad.pucrs.br to start
qsub: job 57322.marfim.lad.pucrs.br ready

--------------------------------------
Running PBS prologue script

Checking all prerequisites...
Done.

pp12821@atlantica02:~/python$ time ladrun -np 16 mpi_sort.py
objdump: mpi_sort.py: File format not recognized

real	0m2.000s
user	0m2.310s
sys	0m3.050s
pp12821@atlantica02:~/python$ time ladrun -np 32 mpi_sort.py
objdump: mpi_sort.py: File format not recognized

real	0m2.126s
user	0m4.740s
sys	0m6.640s
pp12821@atlantica02:~/python$ exit
qsub: job 57322.marfim.lad.pucrs.br completed
pp12821@marfim:~/python$ ladalloc -c atlantica -n 4 -t 60 -e
/usr/local/torque-2.5.11/bin/qsub -I -V -d /home/pp12821/python -l nodes=4:cluster-Atlantica:ppn=16,walltime=00:60:00
qsub: waiting for job 57323.marfim.lad.pucrs.br to start
qsub: job 57323.marfim.lad.pucrs.br ready

--------------------------------------
Running PBS prologue script

Checking all prerequisites...
Done.

pp12821@atlantica04:~/python$ time ladrun -np 32 mpi_sort.py
objdump: mpi_sort.py: File format not recognized

real	0m4.506s
user	0m2.720s
sys	0m5.210s
pp12821@atlantica04:~/python$ time ladrun -np 64 mpi_sort.py
objdump: mpi_sort.py: File format not recognized

real	0m4.534s
user	0m5.650s
sys	0m11.370s
pp12821@atlantica04:~/python$ exit
qsub: job 57323.marfim.lad.pucrs.br completed