PSTSWM SP2-66 Communication Protocol Performance

Performance Studies using

PSTSWM

IBM SP2-66 Protocol Performance

(transpose LT experiment II-A2 / O(P) swap transpose algorithm)

Date/Person: March 22, 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: 6.0
Compilation Options: mpxlf -O3 -qarch=pwr2
Math Library: none
Communication Library: MPL
Parallel Algorithm: swtrans
(assuming transpose FFT)
Number of Timesteps: 12
Results:

1x16 Processors / Problem T21L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.5929e-02   1.09   1.13   3.40 
Three Fastest
Protocols
1st2nd3rd
  e1   e3   e2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   3 

1x8 Processors / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.8495e-01   0.17   0.19   0.38 
Three Fastest
Protocols
1st2nd3rd
  e3   e2   e1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   4   24 

1x16 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.7994e-01   0.20   0.20   0.41 
Three Fastest
Protocols
1st2nd3rd
  e3   e1   e2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   3   15 

1x8 Processors / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.2867e+00   0.06   0.06   0.17 
Three Fastest
Protocols
1st2nd3rd
  a3   a2   e1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   12   28 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:13:43 EDT.