PSTSWM T3D Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research T3D Protocol Performance

(distributed LT experiment A / ring-pipeline sum algorithm)

Date/Person: October 28, 1994 / P. Worley
Platform: T3D at Cray Research in Eagen, MN (rain):
   128 150-MHz DEC Alpha EV4 RISC processors
Environment: IS-9.0
Cray CF90 Version 0.1.2.3
Code Version: 6.1
Compilation Options: /mpp/bin/f90 -dp -Oscalar3
Math Library: none
Communication Library: SHMEM
Parallel Algorithm: ringpipe
Number of Timesteps: 12
Results:

1x16 Processors / Problem T21L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.4545e-01   0.11   0.11   0.29 
Three Fastest
Protocols
1st2nd3rd
  a2   c2   i2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   7   16 

1x32 Processors / Problem T42L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.3528e-01   0.13   0.12   0.34 
Three Fastest
Protocols
1st2nd3rd
  a2   c2   f2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   5   16 

1x8 Processors / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  8.5344e-01   0.04   0.02   0.12 
Three Fastest
Protocols
1st2nd3rd
  i2   f2   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   11   19 

1x16 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.3369e+00   0.06   0.04   0.16 
Three Fastest
Protocols
1st2nd3rd
  i2   f2   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   10   19 

1x32 Processors / Problem T85L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.5450e+00   0.10   0.06   0.28 
Three Fastest
Protocols
1st2nd3rd
  i2   f2   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   7   16 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:24:03 EDT.