
236 CHAPTER 4 Workload-Driven Evaluation
modest goal, let us assume that we have scaled down the application parameters and
the number of processors in some reasonable way and see how to scale other
machine parameters.
Other Machine Parameters
Scaled-down problem and machine sizes interact differently with low-level machine
parameters than the full-scale problems would. We may therefore have to scale these
parameters carefully as well
Consider the size of the cache or replication store. Suppose that the largest prob-
lem and machine configuration that we can simulate for the equation solver kernel
is a 512 x 512 grid with 16 processors (i.e. ...