PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(transpose LT experiment I-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: MPI
Parallel Algorithm: logtrans
(assuming distributed FFT)
Number of Timesteps: 12
Results:

4x16 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.9095e-01   0.06   0.03   0.58 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   20   24 

2x32 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.4874e-01   0.06   0.03   0.38 
Three Fastest
Protocols
1st2nd3rd
  c1   d3   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   13   13 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.7067e-01   0.03   0.03   0.05 
Three Fastest
Protocols
1st2nd3rd
  c1   a6   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   23   25 

4x16 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.5074e-01   0.03   0.03   0.05 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   25   25 

2x32 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  8.2650e-01   0.03   0.04   0.06 
Three Fastest
Protocols
1st2nd3rd
  a1   a4   a5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   24   25 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.9726e+00   0.01   0.01   0.03 
Three Fastest
Protocols
1st2nd3rd
  b2   a1   b3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  12   25   25 

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