Requirements Of A Practical Model
•Like
von Neumann …
–Capture
key features of HW implementations
–Reflect
costs realistically
–Portable
across physical machines
–Be as
simple as possible relative to the above
•Problems
for parallel programmers …
–Parallel
computers have widely different architectures -- steady-state cost not
established
–Existing
SW for Cray vector machines, poor guide
–Sequential
computers keep getting faster