Supercluster interactive multi-CPU
The next step in scaling up your program is to increase the number of processes that are devoted to the simulation. This is particularly simple if you are working with an n-way decomposition. Because there will be processes running simultaneously, errors related to timing or insufficient "barrier" commands will frequently be encountered at this stage. Also, some speedup estimates can be made by comparing the performance on n nodes with that on 1 node.
As an example, you can try the orient2 example, which is an n-way decomposition of the serial Genesis Orient_tut example:
These names tell PVM where it may spawn other nodes. Since the demo.g script spawns 6 nodes, and we have 4 total machines (axpfea,axp0,axp1, & axp2), for running 7 processes, each CPU will be assigned 1 or 2 nodes. For production runs, it is a good idea to have the number of CPUs equal the number of nodes so that each node has its own CPU, but for testing this is not necessary.