PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

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

Date/Person: May 11, 1998 / P. Worley
Platform: SGI Origin2000 at Los Alamos National Laboratory (nirvana11):
   128 195-MHz MIPS R10000 processors
Environment: IRIX 6.5
mpt_1.2.0.1
MIPSpro Compilers: Version MIPS pro_7.2
Code Version: 6.3
Compilation Options: f77 -64 -i4 -O3
Math Library: SCSL
Communication Library: SHMEM
Parallel Algorithm: logtrans
Number of Timesteps: 12
Results:

16x4 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.2329e-01   0.11   0.12   0.20 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   10 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.8745e-01   0.08   0.09   0.15 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   4   10 

16x4 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.2215e-01   0.15   0.18   0.26 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   9 

32x2 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  9.1210e-01   0.14   0.14   0.24 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   b1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   10 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.5535e+00   0.01   0.01   0.02 
Three Fastest
Protocols
1st2nd3rd
  a1   a2   d2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   10   10 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:06:31 EDT.