PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(distributed LT experiment C / ring-pipeline sum 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: MPI
Parallel Algorithm: ringpipe
Number of Timesteps: 12
Results:

4x16 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.1743e-01   0.19   0.08   0.70 
Three Fastest
Protocols
1st2nd3rd
  c0   a0   f2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   19   37 

2x32 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.7146e-01   0.29   0.07   0.94 
Three Fastest
Protocols
1st2nd3rd
  c0   a0   a6 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   20   31 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.7315e-01   0.07   0.06   0.21 
Three Fastest
Protocols
1st2nd3rd
  c1   i1   f3 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   22   50 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.7979e-01   0.10   0.08   0.20 
Three Fastest
Protocols
1st2nd3rd
  f3   c2   c3 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   11   50 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4958e-01   0.15   0.16   0.34 
Three Fastest
Protocols
1st2nd3rd
  f1   f3   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   13   41 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.9991e+00   0.06   0.06   0.10 
Three Fastest
Protocols
1st2nd3rd
  c3   c2   f3 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   21   50 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:06:45 EDT.