PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(distributed FFT experiment C)

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: 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
  6.0260e-02   0.20   0.21   0.45 
Three Fastest
Protocols
1st2nd3rd
  d1   c1   d2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   7 

32x2 Processors (Column Major Ordering) / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  6.8445e-02   0.18   0.21   0.25 
Three Fastest
Protocols
1st2nd3rd
  c1   c2   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   9 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.6316e-01   0.21   0.19   0.43 
Three Fastest
Protocols
1st2nd3rd
  c1   d1   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   5 

16x4 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.6861e-01   0.19   0.16   0.40 
Three Fastest
Protocols
1st2nd3rd
  c1   d1   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   5 

32x2 Processors (Column Major Ordering) / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.6070e-01   0.16   0.15   0.33 
Three Fastest
Protocols
1st2nd3rd
  d1   c1   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   7 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.0874e+00   0.18   0.15   0.41 
Three Fastest
Protocols
1st2nd3rd
  d1   c1   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   3   5 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:07:54 EDT.