User: knarf Date: 2011/04/04 12:12 AM

Modified: / ET.tex

Log: some future work

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File [modified]: ET.tex Delta lines: +24 -4 =================================================================== --- ET.tex 2011-04-02 02:03:03 UTC (rev 42) +++ ET.tex 2011-04-04 05:12:38 UTC (rev 43) @@ -1258,11 +1258,31 @@

\section{Future Work\pages{1 Frank}} -- MHD -- massively parallel AMR -- radiation transport -- advanced wave extraction +This paper illustrated the current state of the ``Einstein Toolkit'', +a collection of freely available and easy to use computational codes +for numerical relativity. However, there is room for improvement on both +the underlying infrastructure and the included physics.

+One of the desirable additions of physics is a proper treatment of +radiation, in particular neutrinos, but possibly even some approximation +of emmission of electro-magnetic waves. Radiation transport is, even compared +to the full GRMHD problem, computationally very expensive, especially in +three dimensions. \todo{mention PetaCactus} + +\todo{mention advanced wave extraction} + +Another important goal is to increase the scalability of the Carpet AMR +infrastructure. It has been shown that good scaling is limited to less than +a few thousend proccesses, for some of the most used simulation scenarios. +In this case, work is already in progress to eliminate this bottle-neck. +On the other hand, a production simulation is typically composed from a large +number of components, and all of them have to scale well to achieve overall +good performance. This is not an easy problem, as most of the module authors +are neither computer scientists nor had they extensive training in parallel +development and profiling techniques. Close collaboration with such experts +has been shown to be very fruitful in the past and is definitely also planned +for the forseeable future. + \section*{Acknowledgments\pages{0.5 All}} \todo{Frank, ADDME} The Einstein Toolkit is directly supported by the National Science Foundation