PSTSWM SP2-66 Communication Protocol Performance

Performance Studies using

PSTSWM

IBM SP2-66 Protocol Performance

(distributed FFT experiment A1)

Date/Person: July 29, 1996 / P. Worley
Platform: IBM SP2 at NASA Ames Research Center (babbage.nas.nasa.gov):
   160 RS6000/590 nodes ("wide", 66.7 MHz POWER2 RISC chip set)
Environment: AIX 4.1.3.3;   POE 2.1.0.8
Code Version: 6.1
Compilation Options: mpxlf -O3 -qarch=pwr2
Math Library: ESSL
Communication Library: MPL
Parallel Algorithm: distributed FFT
Number of Timesteps: 12
Results:

16x1 Processors / Problem T21L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.1071e-01   0.55   0.49   1.23 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   c3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   10 

16x1 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  6.3819e-01   0.50   0.47   1.09 
Three Fastest
Protocols
1st2nd3rd
  a1   c3   d3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   10 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:13:02 EDT.