Meeting minutes:
Present were: Tanja, Roland, Ian, Eloisa, Erik, Bruno, Yosef
ET paper: * Bruno still has troubles with RotatingSymmetry180 when using the development version of ET for the BBH example (parfile is in subversion) * will try running without RotatingSymmetry180 * convergence in norms is bad, somewhat better in 1D data for a short time after simulation startup * cosmology example is done for now * other examples had no maintainer on the phone call * example data: ** add parfiles to paper repository ** add data for plots to paper repository ** have single person generate all plots for final version to achieve uniform style
Array padding: * Erik suggests introducing array padding into Cactus to avoid cache aliasing issues * re-use existing but (essentially) unused cctk_lssh for loop boundaries of i,j,k * would use cctk_lsh to compute 1D index from i,j,k * would loop i,j,k using cctk_lssh * Cactus doc's already say to use cctk_lssh for this * thorns that are not updated *might* only compute extra unused data for the "padding" points ** thorns using ghostzones/boundary zones as cctk_lsh-nghostzones/boundary_width might cause problems ** thorns computing in the interior might compute extra data and overwrite ghostzone/boundary information * would like to have a mechanism to check for errors during runtime * make padding a runtime parameter in the parameter files * provide example parfile demonstrating speedup
Yours, Roland