PSTSWM Origin2000 Algorithm Comparison

Performance Studies using

PSTSWM

SGI/Cray Research Origin2000 Algorithm Comparison

(transpose FFT experiment 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
Number of Timesteps: 12
Results:

Transpose FFT (mpi)
Algorithm Comparison
  T10L16    T10L16    T21L8     T21L32    T21L16    T42L16 
  P=32     P=16     P=8     P=32     P=16     P=8  
  optimal algorithm   logtrans  srtrans  srtrans  swtrans  swtrans  swtrans 
  (alltoallv-min)/min     0.109    0.006    0.074    0.024    0.058    0.172 
  (generic-min)/min     0.208    0.021    0.007    0.017    0.051    0.007 

Transpose FFT (shmem)
Algorithm Comparison
  T10L16    T10L16    T21L8     T21L32    T21L16    T42L16 
  P=32     P=16     P=8     P=32     P=16     P=8  
  optimal algorithm   swtrans  swtrans  srtrans  swtrans  swtrans  swtrans 
  (generic-min)/min     0.154    0.111    0.150    0.074    0.111    0.064 

Transpose FFT (combined)
Communication Library Comparisons
  T10L16    T10L16    T21L8     T21L32    T21L16    T42L16 
  P=32     P=16     P=8     P=32     P=16     P=8  
  optimal library   shmem  shmem  shmem  shmem  shmem  shmem 
  (alltoallv-min)/min     0.289    0.188    0.084    0.038    0.162    0.239 
  (mpi-min)/min     0.162    0.182    0.009    0.013    0.098    0.057 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:12:35 EDT.