PSTSWM Origin2000 Communication Protocol Performance

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Protocol Performance

(transpose LT experiment I-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: SHMEM
Parallel Algorithm: logtrans
(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
  1.8016e-01   0.07   0.04   0.49 
Three Fastest
Protocols
1st2nd3rd
  b6   c2   d6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   9   9 

2x32 Processors (Column Major Ordering) / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.3480e-01   0.02   0.02   0.04 
Three Fastest
Protocols
1st2nd3rd
  d1   c2   d2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   5   5 

8x8 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4683e-01   0.02   0.02   0.07 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   8   10 

4x16 Processors (Column Major Ordering) / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4210e-01   0.05   0.05   0.11 
Three Fastest
Protocols
1st2nd3rd
  a1   c1   b1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   6   10 

2x32 Processors (Column Major Ordering) / Problem T42L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.8941e-01   0.11   0.12   0.22 
Three Fastest
Protocols
1st2nd3rd
  a1   d1   b6 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   10 

8x8 Processors (Column Major Ordering) / Problem T85L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.7414e+00   0.03   0.03   0.05 
Three Fastest
Protocols
1st2nd3rd
  a1   a2   c1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   9   10 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:08:19 EDT.