[ET Trac] [Einstein Toolkit] #744: Define API for finding out which MPI processes share a host

[Einstein Toolkit]

#744: Define API for finding out which MPI processes share a host
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 Reporter:  eschnett     |       Owner:     
     Type:  enhancement  |      Status:  new
 Priority:  major        |   Milestone:     
Component:  Cactus       |     Version:     
 Keywords:               |  
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 This API could be a flesh API, provided by the driver, or could be
 implemented via aliased functions.

 For example:

 int CCTK_nHosts(cGH*)
 int CCTK_MyHost(cGH*)

 Probably also functions for mapping:

 process <-> (host, hostprocess)
 host -> (list of processes)

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/744>
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