PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(distributed FFT experiment C)

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: MPI
Parallel Algorithm: distributed FFT
Number of Timesteps: 12
Results:

16x4 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  8.2465e-02   0.22   0.15   0.64 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   a2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   4   21 

32x2 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  8.2383e-02   0.25   0.16   0.80 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   a3 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   20 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4279e-01   0.06   0.05   0.17 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   c1 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   13   26 

16x4 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4489e-01   0.06   0.04   0.14 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   a6 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   14   26 

32x2 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.1193e-01   0.14   0.14   0.29 
Three Fastest
Protocols
1st2nd3rd
  c1   d1   c2 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   5   23 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4195e+00   0.36   0.21   0.94 
Three Fastest
Protocols
1st2nd3rd
  d5   c5   c4 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   5   14 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:06:05 EDT.