PSTSWM T3E-900 Communication Protocol Performance

Performance Studies using

PSTSWM


SGI/Cray Research T3E-900 Protocol Performance

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

Date/Person: May 8, 1998 / P. Worley
Platform: T3E-900 at National Energy Research Scientific Computing Center (mcurie.nersc.gov):
   532 450-MHz DEC Alpha EV5 RISC processors
Environment: UNICOS/mk 2.0.2.28
mpt 1.2.0.2
Cray CF90 Version 3.0.2.1
Code Version: 6.3
Compilation Options: -dp -Oscalar3 -Wl,-Dstreams=on
Math Library: libsci
Communication Library: MPI
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
  3.6845e-02   0.48   0.41   0.99 
Three Fastest
Protocols
1st2nd3rd
  a6   e0   b0 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   6 

1x32 Processors / Problem T42L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.9920e-02   0.49   0.42   1.10 
Three Fastest
Protocols
1st2nd3rd
  a6   e0   e2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   7 

1x8 Processors / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.0509e-01   0.08   0.08   0.16 
Three Fastest
Protocols
1st2nd3rd
  e0   e1   e2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   7   31 

1x16 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.5317e-01   0.15   0.15   0.25 
Three Fastest
Protocols
1st2nd3rd
  a0   e0   a6 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   30 

1x32 Processors / Problem T85L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.9994e-01   0.11   0.11   0.27 
Three Fastest
Protocols
1st2nd3rd
  a6   e0   e2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   8   30 

1x8 Processors / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.2995e+00   0.10   0.10   0.12 
Three Fastest
Protocols
1st2nd3rd
  a0   e0   e1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   31 


Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:28:38 EDT.