PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM


SGI/Cray Research Origin2000 Protocol Performance

(transpose FFT experiment 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
Number of Timesteps: 12
Results:

16x4 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.9844e-01   0.09   0.04   0.21 
Three Fastest
Protocols
1st2nd3rd
  a1   a0   a6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   14   25 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.2175e-01   0.07   0.09   0.13 
Three Fastest
Protocols
1st2nd3rd
  a1   a0   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   10   25 

16x4 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.0702e-01   0.12   0.12   0.44 
Three Fastest
Protocols
1st2nd3rd
  a1   a0   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   6   24 

32x2 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  5.8738e-01   0.14   0.14   0.36 
Three Fastest
Protocols
1st2nd3rd
  a1   a0   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   6   23 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.6574e+00   0.04   0.03   0.08 
Three Fastest
Protocols
1st2nd3rd
  a1   a6   a4 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   15   25 


Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:53 EDT.