PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM


SGI/Cray Research Origin2000 Protocol Performance

(transpose FFT experiment C / O(log P) transpose 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: logtrans
Number of Timesteps: 12
Results:

16x4 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.6427e-01   0.06   0.04   0.15 
Three Fastest
Protocols
1st2nd3rd
  c1   d1   b1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   6   10 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.5210e-01   0.12   0.11   0.26 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   9 

16x4 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.6764e-01   0.14   0.12   0.33 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   8 

32x2 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.9340e-01   0.15   0.13   0.33 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   8 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.0535e+00   0.12   0.13   0.23 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   b6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   10 


Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:26 EDT.