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Linpack

Grabbed the Linpack source and compiled against /opt/openmpi/1.4.2 … using the Make.Linux_PII_CBLAS makefile. Had to grab the atlas libraries from another host. We changed $HOME and pointed to libmpi.so ($MPdir and $MPlib) and repointed $LAdir. Then it compiled fine.

Runs

So based on what we did with the Dell burn in, follow this HPLinpack Runs link, some calculations:

  • N calculation: 32 nodes, 12 gb each is 384 gb total which yields 48 gb double precision (8 byte) elements … 48 gb is 48*1024*1024*1024 = 51,539,607,552 … take the square root of that and round 227,032 … 80% of that is 181,600
  • NB: start with 64, then 128, try 192 …
  • PxQ: perfect square of 16×16=256, the number of cores we have.


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cluster/91.1291835335.txt.gz · Last modified: 2010/12/08 19:08 by hmeij