Meeting minutes:
Present were: Tanja, Roland, Frank, Bruno, Yosef, Peter, Erik, Eloisa, Ian
ET paper:
MHD: * Christian and Bruno independently looked at PPM and re-split its MHD version from the hydro only version and rearranged code to allow the compiler (ifort) to optimize the routine * Bruno finds about 3% speedup (in PPM) * Erik says that Christian found about 30% speedup * Bruno and Christian will exchange notes * Peter agreed to run some performance tests with hardware counters using a parameter file that Bruno will provide * we still fail the cylindrical blast wave test which many other codes also do not pass (using divergence cleaning) * will try dissipation in the B field * will run white noise test for dissipation to check that divergence cleaning works as expected (see apples with apples paper)
CCE: * Yosef committed writeup of sketch of documentation and a sample parameter file based on simfactory's qc0 example * we would like a testsuite, which might however require a large input file for CCE * Yosef is not sure if the PITTNull CCE extractor would work with Multipatch codes since he has no access to any * Christian Reisswigs Worldtube thorn should (there is a Llama version) * Yosef will give a short tutorial at a later date, date TBA
testsuites: * see Ian's email http://lists.einsteintoolkit.org/pipermail/users/2011-July/001253.html * test data was regenerated for RotatingSymmetry which was affected by changes in Kranc which affected McLachlan * correct boundary/ghost zones in GRHydro test for second order convergence (2 required for McLachlan due to advective derivatives) * try tapering to find fourth order convergence in constraints
paper: * no progress * need to write missing sections (!) * all authors: take half an hour to read sections and make comments * lead author(s) will assign sections to people to work on in the next two weeks, and which sections to keep or drop (depending on their state) * reserve a Monday call for paper talk (with all callers having read the paper) * decide on day for call within the next three days (until Wednesday), Frank will set up a doodle poll
Yours, Roland