[GE users] process to core distribution

Joseph Hargitai joseph.hargitai at nyu.edu
Fri Oct 17 11:48:55 BST 2008

Running parallel jobs:

with openmpi the distribution of processes on 16 core nodes are even when using a pe that allows 8 or 4 cores only. Meaning you get 2 processes on each of the cores.

with mvapich1x we get a fillup - first 8 cores populate. 2 other cpus idle.

Noted that in mvapich2 there is a method to distribute to specific cores.

What role if any is SGE playing in how processes are mapped to cores?


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