🚀 go-pugleaf

In article <13910002@hpisod2.HP.COM> dhepner@hpisod2.HP.COM (Dan Hepner) writes:
>Is a coherent cache system essential or just nice?  And why?
It is essential if your cost of computing is dominated by software development
costs.  A system with large coherent caches allows you to exploit data locality
by suitably mapping processors to the data set, but still allows the maintenance
of a shared memory programming environment.  At our laboratory, the cost of
coding dominates the cost of computing by about a factor of 5.  Coding cost is
a very high priority issue because of this.  The situtation may be different in
other environments, ours may be unique with respect to the complexity of
physical simulation codes and the daily modifications to them that occurs to
support new physics as the designers who use the codes run their problems.


brooks@maddog.llnl.gov, brooks@maddog.uucp