PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(distributed LT experiment C / ring 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: 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
  4.9538e-02   0.12   0.12   0.20 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   c2 
       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
  6.3058e-02   0.17   0.20   0.37 
Three Fastest
Protocols
1st2nd3rd
  c1   c2   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   8 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.0914e-01   0.04   0.05   0.07 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   7   10 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.7566e-01   0.07   0.08   0.13 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   3   10 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.2921e-01   0.10   0.12   0.22 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   10 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.7744e+00   0.03   0.03   0.06 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   9   10 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:39 EDT.