PSTSWM Paragon Communication Protocol Performance

Performance Studies using

PSTSWM

Intel Paragon Protocol Performance

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

Date/Person: May 13, 1998 / P. Worley
Platform: Intel Paragon XP/S 150 MP at Oak Ridge National Laboratory:
     1024 MP nodes (3 50-MHz iPSC/860 processors per node)
Environment: Paragon OSF/1 Release 1.0.4 Server 1.4 R1_4_5
f77/Paragon Paragon Version R5.0.3
Code Version: 6.3
Compilation Options: if77 -O4 -Mnodepchk -Knoieee -Msafealloc
Math Library: KAI
Communication Library: NX
Parallel Algorithm: logtrans
Partition: 1x8, 1x16, or 1x32
Results:

16x1 Processors / Problem T10L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  4.8174e-01   0.30   0.06   0.96 
Three Fastest
Protocols
1st2nd3rd
  b0   b1   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   9   14 

32x1 Processors / Problem T10L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  7.0408e-01   0.24   0.04   0.89 
Three Fastest
Protocols
1st2nd3rd
  b0   c2   c3 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  3   13   14 

8x1 Processors / Problem T21L8
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.2604e+00   0.08   0.08   0.19 
Three Fastest
Protocols
1st2nd3rd
  c2   c4   c5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  4   12   24 

16x1 Processors / Problem T21L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.5370e+00   0.15   0.18   0.38 
Three Fastest
Protocols
1st2nd3rd
  c2   c4   c5 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   9   19 

32x1 Processors / Problem T21L32
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  2.0636e+00   0.37   0.51   1.00 
Three Fastest
Protocols
1st2nd3rd
  c2   c4   a2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  1   11   12 

8x1 Processors / Problem T42L16
Runtime Statistics
min(mean-min)/min(median-min)/min(max-min)/min
  1.1683e+01   0.02   0.02   0.04 
Three Fastest
Protocols
1st2nd3rd
  d2   c4   c2 
       Number of Proctocols With
Runtimes Within X% of Min
1%5%25%
  2   23   23 

DISCUSSION

Partitions of the Paragon processor grid were used that match the processor subsets that the parallel algorithms would run on in a two dimensional data decomposition: 1x8, 1x16, and 1x32.
Patrick H. Worley / ( worleyph@ornl.gov)
Last Modified Monday, 15-Jul-2002 10:29:45 EDT.