PSTSWM SP3-200 Communication Protocol Performance

Performance Studies using

PSTSWM

IBM SP3-200 Protocol Performance

(transpose FFT experiment A1 / O(P) swap transpose algorithm)

Date/Person: November 28, 1999 / P. Worley
Platform: IBM SP3 at Oak Ridge National Laboratory (morgan.ccs.ornl.gov):
     62 2-way Winterhawk I SMP nodes (200 MHz POWER3 with 4MB L2 cache, equivalent to RS/6000 Model 260)
Environment: AIX 4.3.2.2;   PSSP 3.1
Code Version: 6.6.4
Compilation Options: mpxlf -O3 -qarch=auto -qtune=auto -qcache=auto
Link Options: -bmaxdata:0x70000000
Environment Variables: export MP_SHARED_MEMORY="yes"
Math Library: ESSL
Communication Library: MPI over the switch using user space for internode communication
MPI using shared memory for intranode communication
Parallel Algorithm: swtrans
Number of Timesteps: 12
Results:

16x1 Processors / Problem T10L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.0607e-01   0.34   0.35   0.71 
Three Fastest
Protocols
1st2nd3rd
  e1   e0   e2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   4   12 

32x1 Processors / Problem T10L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.7947e-01   0.36   0.41   0.73 
Three Fastest
Protocols
1st2nd3rd
  e2   e3   e1 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   4   11 

8x1 Processors / Problem T21L8
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.6348e-01   0.28   0.26   0.54 
Three Fastest
Protocols
1st2nd3rd
  e5   e4   e3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   14 

16x1 Processors / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.2271e-01   0.37   0.36   0.62 
Three Fastest
Protocols
1st2nd3rd
  e5   e4   e3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   3   8 

32x1 Processors / Problem T21L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.3995e-01   0.48   0.46   0.84 
Three Fastest
Protocols
1st2nd3rd
  e4   e3   e5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   4 

8x1 Processors / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.3017e+00   0.08   0.08   0.56 
Three Fastest
Protocols
1st2nd3rd
  a5   a4   e4 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  6   13   30 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:17:07 EDT.