On Fri, Dec 4, 2009 at 08:03, Ralph Castain <r...@open-mpi.org> wrote:
> > > It is polling at the barrier. This is done aggressively by default for > performance. You can tell it to be less aggressive if you want via the > yield_when_idle mca param. > > How do I use this parameter correctly? I tried /usr/local/openmpi-1.3.4-gcc-4.4.2/bin/mpirun -np 3 --mca mpi_yield_when_idle 1 ./master but still get nbock 20794 0.0 0.0 53980 2344 pts/2 S+ 08:11 0:00 /usr/local/openmpi-1.3.4-gcc-4.4.2/bin/mpirun -np 3 --mca mpi_yield_when_idle 1 ./master nbock 20795 96.7 0.0 159096 3896 pts/2 R+ 08:11 1:10 ./master nbock 20796 0.0 0.0 158960 3804 pts/2 S+ 08:11 0:00 ./master nbock 20797 0.0 0.0 158960 3804 pts/2 S+ 08:11 0:00 ./master nbock 20813 88.1 0.0 158964 3892 pts/2 R+ 08:12 0:08 ./slave arg1 arg2 nbock 20814 86.9 0.0 158964 3908 pts/2 R+ 08:12 0:08 ./slave arg1 arg2 nbock 20815 87.5 0.0 158964 3900 pts/2 R+ 08:12 0:08 ./slave arg1 arg2 nick
