[Commits] [svn:einsteintoolkit] Paper_EinsteinToolkit_2010/ (Rev. 43)

[knarf at cct.lsu.edu]

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

Modified:
 /
  ET.tex

Log:
 some future work

File Changes:

Directory: /
============

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