PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(distributed LT experiment C / exchange 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: 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
  9.2573e-02   0.06   0.06   0.13 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   c2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   9   25 

2x32 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.2498e-01   0.09   0.07   0.53 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   10   24 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.1534e-01   0.04   0.03   0.36 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   22   24 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.7838e-01   0.19   0.07   0.52 
Three Fastest
Protocols
1st2nd3rd
  b3   b2   b6 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   11   15 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.4633e+00   0.49   0.44   1.12 
Three Fastest
Protocols
1st2nd3rd
  a5   a4   b6 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   6 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.3413e+00   0.17   0.11   0.52 
Three Fastest
Protocols
1st2nd3rd
  b6   b4   b5 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   5   19 

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