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: SHMEM
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
  5.0320e-02   0.09   0.06   0.22 
Three Fastest
Protocols
1st2nd3rd
  i2   c1   i1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   6   19 

2x32 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.8264e-02   0.18   0.20   0.40 
Three Fastest
Protocols
1st2nd3rd
  f2   i2   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   14 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.9928e-01   0.04   0.04   0.08 
Three Fastest
Protocols
1st2nd3rd
  i2   f2   i1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   11   19 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.2434e-01   0.08   0.06   0.18 
Three Fastest
Protocols
1st2nd3rd
  f2   i2   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   7   19 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.4664e-01   0.13   0.09   0.50 
Three Fastest
Protocols
1st2nd3rd
  f2   i2   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   6   17 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.5098e+00   0.04   0.04   0.10 
Three Fastest
Protocols
1st2nd3rd
  i2   f2   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   12   19 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:44 EDT.