1 | Earthquakes cause load imbalance as "action" concentrated in processors where quake occurs |
2 | Can be addressed at cost of increasing communication by using "block-cyclic" decomposition so each processor gets part of action |
3 | Problem particularly bad for Monte Carlo as like classic "clustering algorithms" needed near critical points to get good performance and these have poor parallel performance |
4 | Long range versions of Monte Carlo will perform satisfactorily as can parallelize over long range force part of computation |