PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(transpose LT experiment I-C / O(P) sendrecv 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: srtrans
(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
  2.2014e-01   0.08   0.03   0.18 
Three Fastest
Protocols
1st2nd3rd
  a1   a0   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   15   25 

2x32 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.8807e-01   0.11   0.03   0.26 
Three Fastest
Protocols
1st2nd3rd
  a0   a6   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   14   18 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.6180e-01   0.03   0.03   0.05 
Three Fastest
Protocols
1st2nd3rd
  a0   c1   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   23   25 

4x16 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.2438e-01   0.06   0.06   0.12 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   a0 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   10   25 

2x32 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.5443e-01   0.06   0.06   0.14 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   11   25 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.6421e+00   0.02   0.02   0.05 
Three Fastest
Protocols
1st2nd3rd
  a6   a2   a4 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  7   25   25 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:48 EDT.