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: 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: 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
  2.0459e-01   0.04   0.04   0.06 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   a6 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   17   25 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.3062e-01   0.02   0.02   0.07 
Three Fastest
Protocols
1st2nd3rd
  c1   a1   a6 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   22   25 

4x16 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.0755e-01   0.03   0.03   0.05 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   a4 
      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
  9.4949e-01   0.02   0.02   0.04 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   b0 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   25   25 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.4987e+00   0.07   0.06   0.19 
Three Fastest
Protocols
1st2nd3rd
  a5   b5   b4 
      Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   11   25 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:06:24 EDT.