== np 2 cluster_poisson
OK (np=2)
== np 4 cluster_poisson
OK (np=4)
== np 8 cluster_poisson
OK (np=8)
== np 2 hub_ml
OK (np=2)
== np 4 hub_static
OK (np=4)
== np 4 ring_mini
OK (np=4)
== np 1 cluster_periodic
OK (np=1)
== np 2 cluster_periodic
OK (np=2)
== np 8 cluster_posonly
OK (np=8)
== np 4 cluster_multilevel
OK (np=4)
== np 4 hub_pgs
OK (np=4)
== np 4 cluster
OK (np=4)
== np 4 cluster_friction
OK (np=4)
== np 4 cluster_jacobi
OK (np=4)
