[mvapich-discuss] Rank Placement in MVAPICH

[vaibhav dutt]

Hi,

I am trying to execute a job  of 16 processes across two nodes and my
hostfile looks like

n1:8
n2:8.

I notice that the ranks   0,2,4,6,8,10,12,14 are on node 1 and
1,3,5,7,9,11,13,15 are on node 2 which seems to be
cyclic distribution. Is this the default rank placement strategy in MVAPICH
as I did not give any special option on runtime
for the rank distribution to be cyclic. How to change it to block?

Thanks
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