PSTSWM Origin2000 Algorithm Comparison

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Algorithm Comparison

(transpose LT experiment I-A )

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
SHMEM
(assuming distributed FFT)
Number of Timesteps: 12
Results:

Transpose LT (1) (mpi)
Algorithm Comparison
  T10L16    T21L8     T21L32    T21L16    T42L16 
  P=16     P=8     P=32     P=16     P=8  
  optimal algorithm   logtrans  srtrans  swtrans  swtrans  swtrans 
  (alltoallv-min)/min     0.091    0.059    0.696    0.180    0.136 
  (generic-min)/min     0.092    0.021    0.029    0.039    0.007 

Transpose LT (1) (shmem)
Algorithm Comparison
  T10L16    T21L8     T21L32    T21L16    T42L16 
  P=16     P=8     P=32     P=16     P=8  
  optimal algorithm   swtrans  srtrans  swtrans  swtrans  srtrans 
  (generic-min)/min     0.109    0.088    0.085    0.099    0.055 

Transpose LT (1) (combined)
Communication Library Comparisons
  T10L16    T21L8     T21L32    T21L16    T42L16 
  P=16     P=8     P=32     P=16     P=8  
  optimal library   shmem  shmem  shmem  shmem  shmem 
  (alltoallv-min)/min     0.242    0.094    0.953    0.274    0.188 
  (mpi-min)/min     0.138    0.033    0.152    0.079    0.046 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:12:37 EDT.