The Next Four Orders of Magnitude in Performance for Parallel CFD

摘要

While some simulations whose computational work requirements are superlinear in memory requirements have executed at 1 Teraflop/s, simulations of PDE-based systems remain "mired" in the hundreds of Gigaflop/s on the same machines. We briefly review the algorithmic structure of typical PDE-based CFD codes that is responsible for this situation and consider possible architectural and algorithmic sources for performance improvement towards the achievement of the remaining four orders of magnitude required to reach 1 Petaflop/s.