PSTSWM SP3-200 Communication Protocol Performance

Performance Studies using

PSTSWM

IBM SP3-200 Protocol Performance

(transpose LT experiment II-A1 / O(P) sendrecv 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: srtrans
(assuming transpose FFT)
Number of Timesteps: 12
Results:

1x16 Processors / Problem T21L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.0667e-02   1.02   0.99   2.44 
Three Fastest
Protocols
1st2nd3rd
  e2   e1   e3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   3 

1x32 Processors / Problem T42L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.8972e-02   1.39   1.48   2.87 
Three Fastest
Protocols
1st2nd3rd
  e2   e1   e3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   1   4 

1x8 Processors / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.1566e-01   0.42   0.37   1.35 
Three Fastest
Protocols
1st2nd3rd
  e4   e5   e3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   6 

1x16 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.6406e-01   0.42   0.38   0.87 
Three Fastest
Protocols
1st2nd3rd
  e3   e4   e5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   2   7 

1x32 Processors / Problem T85L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.9963e-01   0.61   0.55   1.46 
Three Fastest
Protocols
1st2nd3rd
  e3   e4   e5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   5 

1x8 Processors / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.2987e+00   0.18   0.09   2.57 
Three Fastest
Protocols
1st2nd3rd
  e3   e5   e4 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   10   29 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:17:00 EDT.