[Carpet] component numbers; CCTK_DELTA_SPACE from one component to another

[Erik Schnetter]

On May 23, 2006, at 12:53:45, Jonathan Thornburg wrote:

> Hi, Erik,
>
> A couple of related questions:
>
> If I do a BEGIN_LOCAL_COMPONENT_LOOP ... END_LOCAL_COMPONENT_LOOP,
> is it guaranteed that Carpet::component will sequence through the
> contiguous set of integers from 0 to
> Carpet::vhh.at(Carpet::map)->components(Carpet::reflevel)-1
> inclusive?  Or is it possible that the local component numbers will
> be some subset of this?

The global component numbers run from 0 to N-1, where N is often the  
number of processors.  The local loop iterates over that subset which  
is local to a processor, i.e., most of the time a single integer in  
the range 0 to N-1.

> Is it necessarily the case that CCTK_DELTA_SPACE() has the same value
> for each component in a given map at a given refinement level?

Yes.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>

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