PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(transpose LT experiment II-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 transpose FFT)
Number of Timesteps: 12
Results:

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.3323e-01   0.03   0.03   0.06 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   20   25 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.8276e+00   0.06   0.03   0.11 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   a4 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   13   25 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:28 EDT.