High Performance Computing 1
How Much Main Memory?
•3/4 rule: For many 3-D computational physics
problems, main memory scales as d^3, while computational cost
scales as d^4.
•However:
•Advances in algorithms,
such as domain decomposition and multigrid, may overturn the
3/4 rule.
•Some
data-intensive applications will still require one byte per flop/s or
more.