PSTSWM T3E-900 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research T3E-900 Protocol Performance

(transpose FFT experiment C / O(P) swap transpose algorithm)

Date/Person: May 11, 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
Number of Timesteps: 12
Results:

16x4 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.2210e-01   0.13   0.11   0.31 
Three Fastest
Protocols
1st2nd3rd
  a0   a6   e0 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   29 

32x2 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.0735e-01   0.15   0.13   0.31 
Three Fastest
Protocols
1st2nd3rd
  a6   a0   e0 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   5   26 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.6781e-01   0.04   0.04   0.09 
Three Fastest
Protocols
1st2nd3rd
  e0   e2   a0 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   17   31 

16x4 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.3398e-01   0.07   0.08   0.16 
Three Fastest
Protocols
1st2nd3rd
  e0   e2   a0 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   13   31 

32x2 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.0957e-01   0.06   0.07   0.14 
Three Fastest
Protocols
1st2nd3rd
  e0   e2   c2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   12   31 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.1191e+00   0.02   0.02   0.04 
Three Fastest
Protocols
1st2nd3rd
  a0   a6   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  9   31   31 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:28:33 EDT.