PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(distributed LT experiment C / recursive halving 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: halfsum
Number of Timesteps: 12
Results:

4x16 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  6.0243e-02   0.12   0.14   0.22 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   d1 
      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
  7.0840e-02   0.20   0.22   0.39 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   6 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.9171e-01   0.07   0.10   0.12 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   4   10 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.5360e-01   0.14   0.16   0.26 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   9 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.7555e-01   0.22   0.25   0.39 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   b1 
      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
  4.3553e+00   0.04   0.04   0.07 
Three Fastest
Protocols
1st2nd3rd
  a1   b1   a2 
      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 10:06:22 EDT.