Basic HTML version of Foils prepared February 13 00

Foil 17 Performance Analysis Parameters

From Master Set for Parallel Programming for Laplace's Equation CPS615 Spring Semester 00 -- February 00. by Geoffrey C. Fox


1 This will only depend on 3 parameters
2 n which is grain size -- amount of problem stored on each processor (bounded by local memory)
3 tfloat which is typical time to do one calculation on one node
4 tcomm which is typical time to communicate one word between two nodes
5 Most importance omission here is communication latency
6 Time to communicate = tlatency+ (Num Words)tcomm
7 Node A
8 Node B
9 tcomm
10 CPU tfloat
11 CPU tfloat
12 Memory n
13 Memory n

in Table To:


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