PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(distributed LT experiment C / ring 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: SHMEM
Parallel Algorithm: ringsum
Number of Timesteps: 12
Results:

4x16 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  6.5818e-02   0.15   0.16   0.28 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   c2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   9 

2x32 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  8.7115e-02   0.18   0.18   0.33 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   c2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   7 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.0658e-01   0.06   0.06   0.09 
Three Fastest
Protocols
1st2nd3rd
  c1   d1   b1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   10 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.8613e-01   0.10   0.12   0.16 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   b1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   10 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  6.2986e-01   0.16   0.16   0.26 
Three Fastest
Protocols
1st2nd3rd
  c1   d1   a1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   8 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4755e+00   0.03   0.04   0.05 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   b1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   8   10 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:06:43 EDT.