PSTSWM T3E-900 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research T3E-900 Protocol Performance

(distributed FFT experiment B)

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: SHMEM
Parallel Algorithm: distributed FFT
Number of Timesteps: 12
Results:

16x4 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.8489e-02   0.07   0.07   0.15 
Three Fastest
Protocols
1st2nd3rd
  a1   a2   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   9 

32x2 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4069e-02   0.09   0.09   0.17 
Three Fastest
Protocols
1st2nd3rd
  a1   a2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   9 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.0647e-01   0.03   0.01   0.07 
Three Fastest
Protocols
1st2nd3rd
  d1   c2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   6   9 

16x4 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.2986e-01   0.03   0.01   0.08 
Three Fastest
Protocols
1st2nd3rd
  d1   d2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   6   9 

32x2 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.5617e-01   0.04   0.02   0.09 
Three Fastest
Protocols
1st2nd3rd
  d1   c1   c2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   6   9 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.8550e+00   0.03   0.03   0.07 
Three Fastest
Protocols
1st2nd3rd
  c1   d1   c2 
      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 10:24:34 EDT.