PSTSWM T3E-900 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research T3E-900 Protocol Performance

(distributed FFT experiment A)

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: SHMEM
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
  3.5001e-02   0.10   0.11   0.17 
Three Fastest
Protocols
1st2nd3rd
  a1   a2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   9 

32x1 Processors / Problem T42L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.3247e-02   0.06   0.07   0.13 
Three Fastest
Protocols
1st2nd3rd
  a1   d1   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   4   9 

8x1 Processors / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.4027e-01   0.04   0.02   0.11 
Three Fastest
Protocols
1st2nd3rd
  a1   d2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   6   9 

16x1 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.9209e-01   0.05   0.05   0.09 
Three Fastest
Protocols
1st2nd3rd
  a1   d1   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   5   9 

32x1 Processors / Problem T85L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.4754e-01   0.03   0.01   0.09 
Three Fastest
Protocols
1st2nd3rd
  d1   c1   a1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   6   9 

8x1 Processors / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.4348e+00   0.04   0.03   0.09 
Three Fastest
Protocols
1st2nd3rd
  c2   d2   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   6   9 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:24:32 EDT.