PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(transpose LT experiment I-C / O(P) swap 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: swtrans
(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
  2.1760e-01   0.06   0.03   0.17 
Three Fastest
Protocols
1st2nd3rd
  a0   a1   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   15   25 

2x32 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.8487e-01   0.09   0.04   0.29 
Three Fastest
Protocols
1st2nd3rd
  a6   a1   a2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   13   22 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.6064e-01   0.03   0.03   0.05 
Three Fastest
Protocols
1st2nd3rd
  c1   c3   a3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  6   25   25 

4x16 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.2562e-01   0.04   0.04   0.07 
Three Fastest
Protocols
1st2nd3rd
  a1   a0   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   15   25 

2x32 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.5411e-01   0.04   0.04   0.08 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   15   25 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.6028e+00   0.03   0.03   0.05 
Three Fastest
Protocols
1st2nd3rd
  a1   a5   b1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   25   25 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:12:21 EDT.