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: April 22, 1999 / P. Worley
Platform: SGI Origin2000 at Los Alamos National Laboratory (n12):
   128 250-MHz MIPS R10000 processors
Environment: IRIX 6.5
mpt_1.3.0.0
MIPSpro Compilers: Version 7.2.1
setenv MPI_DSM_MUSTRUN 1
Code Version: 6.4.3
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
  1.1611e-01   0.11   0.07   0.38 
Three Fastest
Protocols
1st2nd3rd
  c0   a6   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   19   39 

2x32 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.5895e-01   0.15   0.05   0.50 
Three Fastest
Protocols
1st2nd3rd
  c0   a0   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   31   36 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.3465e-01   0.05   0.05   0.11 
Three Fastest
Protocols
1st2nd3rd
  c3   c1   i1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   24   50 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.4073e-01   0.08   0.06   0.18 
Three Fastest
Protocols
1st2nd3rd
  f1   i1   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  7   17   50 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.0545e-01   0.13   0.09   0.30 
Three Fastest
Protocols
1st2nd3rd
  c1   f1   i1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   14   43 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.6488e+00   0.06   0.06   0.19 
Three Fastest
Protocols
1st2nd3rd
  c2   c3   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   21   50 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:42 EDT.