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: SHMEM
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
  8.8035e-02   0.10   0.10   0.20 
Three Fastest
Protocols
1st2nd3rd
  c2   c1   d2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   10 

2x32 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.5536e-01   0.13   0.10   0.28 
Three Fastest
Protocols
1st2nd3rd
  c2   a2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   9 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.5930e-01   0.06   0.05   0.14 
Three Fastest
Protocols
1st2nd3rd
  c2   c1   d2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   4   10 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.1325e-01   0.12   0.14   0.22 
Three Fastest
Protocols
1st2nd3rd
  a2   a1   c2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   10 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.2508e+00   0.22   0.27   0.38 
Three Fastest
Protocols
1st2nd3rd
  a2   a1   b2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   5 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.0018e+00   0.09   0.15   0.17 
Three Fastest
Protocols
1st2nd3rd
  a2   b2   b6 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   10 


Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:06:18 EDT.