PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(transpose LT experiment II-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 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
  2.9888e-01   0.06   0.05   0.40 
Three Fastest
Protocols
1st2nd3rd
  a1   a0   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   13   24 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.2768e+00   0.03   0.03   0.06 
Three Fastest
Protocols
1st2nd3rd
  a1   a5   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  6   22   25 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:12:07 EDT.