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: SHMEM
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
  1.7060e-01   0.04   0.04   0.09 
Three Fastest
Protocols
1st2nd3rd
  c1   e1   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   8   12 

2x32 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.2904e-01   0.20   0.06   1.84 
Three Fastest
Protocols
1st2nd3rd
  e2   e1   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   6   11 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.2227e-01   0.02   0.02   0.05 
Three Fastest
Protocols
1st2nd3rd
  e1   c1   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   12   12 

4x16 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.1080e-01   0.03   0.03   0.09 
Three Fastest
Protocols
1st2nd3rd
  e2   c1   a1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   11   12 

2x32 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  6.9590e-01   0.03   0.03   0.09 
Three Fastest
Protocols
1st2nd3rd
  e1   a1   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   10   12 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.4464e+00   0.03   0.03   0.06 
Three Fastest
Protocols
1st2nd3rd
  a1   b6   b1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   9   12 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:51 EDT.