HTML version of Scripted Foils prepared 18 Sept 1995

Foil 78 Necessary Latency to Support Three Categories

From Second set of lectures on CPS615 Parallel Computing Overview CPS615 Basic Simulation Track for Computational Science -- Fall Semester 95. by Geoffrey C. Fox *
1 This is formal latency to ensure that one can reach design goals of previous table. I picosecond (Category I) cannot be attained. You solve this by having N concurrent streams -- Then each of them needs latency of N picoseconds
2 e.g. If output rate of an arithmetic unit is 1 per nanosecond, then each of 400 teraflop CPU's in Category I design must have 1000 arithmetic units running at full speed to each full system performance of 0.4 petaflops
3 See Chapter 6 of Petaflops Report -- July 94
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