PSTSWM SP3-200 Communication Protocol Performance

Performance Studies using

PSTSWM

IBM SP3-200 Protocol Performance

(distributed LT experiment A1 / ring-pipeline sum 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: ringpipe
Number of Timesteps: 12
Results:

1x16 Processors / Problem T21L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.4831e-02   0.50   0.39   1.29 
Three Fastest
Protocols
1st2nd3rd
  c0   i2   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   3   21 

1x32 Processors / Problem T42L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  9.4539e-02   0.44   0.32   1.35 
Three Fastest
Protocols
1st2nd3rd
  i3   c0   i2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   5   22 

1x8 Processors / Problem T42L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.0480e-01   0.33   0.28   0.72 
Three Fastest
Protocols
1st2nd3rd
  i4   g4   i5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   4   21 

1x16 Processors / Problem T85L1
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.8032e-01   0.39   0.34   0.82 
Three Fastest
Protocols
1st2nd3rd
  i4   i5   g4 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   12 

1x32 Processors / Problem T85L2
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  3.1194e-01   0.41   0.35   1.12 
Three Fastest
Protocols
1st2nd3rd
  i4   f4   i5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   2   14 

1x8 Processors / Problem T85L4
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  9.5160e-01   0.15   0.12   0.63 
Three Fastest
Protocols
1st2nd3rd
  f5   c3   i5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   17   38 

Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:16:40 EDT.