PSTSWM AlphaSC-500 Communication Protocol Performance

Performance Studies using

PSTSWM

Compaq AlphaServer SC Protocol Performance

(distributed FFT experiment A1)

Date/Person: November 4, 1999 / P. Worley
Platform: Compaq AlphaServer SC at Compaq (fsehpc):
     16 ES40 4-way SMP nodes (500 MHz Alpha 21264 with 4MB L2 cache)
Environment: Digital UNIX V5.0;   RMS 2.3.2
Code Version: 6.6.3
Compilation Options: f90 -O4 -assume accuracy_sensitive -math_library accurate -aling dcommons -align records -arch host -tune host
Math Library: none
Communication Library: MPI
Parallel Algorithm: distributed FFT
Number of Timesteps: 12
Results:

16x1 Processors / Problem T21L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.8226e-02   0.42   0.14   5.30 
Three Fastest
Protocols
1st2nd3rd
  a3   a2   b3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   5   19 

8x1 Processors / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.3976e-01   0.17   0.07   2.45 
Three Fastest
Protocols
1st2nd3rd
  d0   d2   d1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   8   23 

16x1 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.4088e-01   0.16   0.03   2.03 
Three Fastest
Protocols
1st2nd3rd
  d1   d3   b0 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  5   17   23 

8x1 Processors / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.0585e+00   0.14   0.13   0.71 
Three Fastest
Protocols
1st2nd3rd
  c2   d2   d3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   7   23 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:03:17 EDT.