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: 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: 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
  6.5525e-02   0.09   0.07   0.21 
Three Fastest
Protocols
1st2nd3rd
  f2   i2   a1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   7   19 

2x32 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.9274e-02   0.16   0.10   0.34 
Three Fastest
Protocols
1st2nd3rd
  i2   f2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   12 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.8921e-01   0.04   0.04   0.09 
Three Fastest
Protocols
1st2nd3rd
  f2   i2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   12   19 

4x16 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.1815e-01   0.07   0.06   0.15 
Three Fastest
Protocols
1st2nd3rd
  f2   a1   d1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   9   19 

2x32 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.8723e-01   0.12   0.10   0.26 
Three Fastest
Protocols
1st2nd3rd
  f2   c1   c2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   7   18 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.8309e+00   0.05   0.05   0.10 
Three Fastest
Protocols
1st2nd3rd
  c2   f2   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   9   19 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:06:47 EDT.