PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(distributed LT experiment C / exchange 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: exchsum
Number of Timesteps: 12
Results:

4x16 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  8.9078e-02   0.08   0.08   0.21 
Three Fastest
Protocols
1st2nd3rd
  c1   a5   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   10   25 

2x32 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.2500e-01   0.09   0.09   0.28 
Three Fastest
Protocols
1st2nd3rd
  a5   c1   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   6   24 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.7121e-01   0.05   0.05   0.24 
Three Fastest
Protocols
1st2nd3rd
  a1   b1   b2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   13   25 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.0111e-01   0.07   0.07   0.22 
Three Fastest
Protocols
1st2nd3rd
  a1   a5   a4 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   11   25 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  9.2782e-01   0.14   0.11   0.27 
Three Fastest
Protocols
1st2nd3rd
  a1   a4   a5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   24 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.2553e+00   0.08   0.06   0.14 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   a4 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   8   25 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:03 EDT.