[ET Trac] [Einstein Toolkit] #1075: Test cases with specific number of processes

[Einstein Toolkit]

#1075: Test cases with specific number of processes
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  Reporter:  eschnett     |       Owner:        
      Type:  enhancement  |      Status:  review
  Priority:  major        |   Milestone:        
 Component:  Cactus       |     Version:        
Resolution:               |    Keywords:        
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Comment (by eschnett):

 A queueing system does not provide MPI processes and OpenMP threads, it
 provides nodes and cores. One has to map these manually, in particular
 when OpenMP is used; the queueing systems' output is usually not good
 enough for this. The respective logic is present in most Simfactory run
 scripts. Simfactory supports over- and under-subscribing, and this works
 fine on most systems (probably on all except BlueGene/P).

 In your case above, most MPI implementations will wrap around, and assign
 the second process to cnode01 as well.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/1075#comment:17>
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