[Users] Einstein Toolkit and modern AMD supercomputer

[Roland Haas]

Hello all,

> - Avoid buffer zones by using an improved time interpolation scheme
> (I've seen papers, I don't know about 3d code)
Eloisa, Ian, I and Erik worked on this for a bit quite a while ago. The
results can be found in branch ianhinder/rkprol:

git clone -b ianhinder/rkprol https://bitbucket.org/cactuscode/cactusnumerical.git

note that this is actually a change to MoL not not so much Carpet. This
implementation should work, but is not optimized and most likely still
has (way) too much communication. Based on two presentations at the ET
meeting in Stockholm: 

https://docs.einsteintoolkit.org/et-docs/ET_Workshop_2015

by Bishop Mongwane and Saran Tunyasuvunakool.

Yours,
Roland

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