Basic HTML version of Foils prepared 10 Sept 1996

Foil 25 Vector Supercomputers in a Nutshell - I

From New CPS615Master Foils-- 26 August 96 Basic Simulation Track for Computational Science CPS615 -- Fall Semester 96. by Geoffrey C. Fox


This design enhances performance by noting that many applications calculate "vector-like" operations
  • Such as c(i)=a(i)+b(i) for i=1...N and N quite large
This allows one to address two performance problems
  • Latency in accessing memory (e.g. could take 10-20 clock cycles between requesting a particular memory location and delivery of result to CPU)
  • A complex operation , e.g. a floating point operation, can take a few machine cycles to complete
They are typified by Cray 1, XMP, YMP, C-90, CDC-205, ETA-10 and Japaneses Supercomputers from NEC Fujitsu and Hitachi



© on Tue Oct 7 1997