PSTSWM SP2-66 Communication Protocol Performance

Performance Studies using

PSTSWM

IBM SP2-66 Protocol Performance

(transpose LT experiment II-A1 / O(log P) transpose algorithm)

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: logtrans
(assuming transpose FFT)
Number of Timesteps: 12
Results:

1x16 Processors / Problem T21L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.0713e-02   0.78   0.86   1.29 
Three Fastest
Protocols
1st2nd3rd
  a1   c3   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   3 

1x16 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.6028e-01   0.81   0.97   1.29 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   c5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   3 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:13:14 EDT.