Basic HTML version of Foils prepared August 29 98

Foil 42 What to Synchronize

From Designing and Building Parallel Programs 2: openMP Shared Memory Programming Language DoD Modernization Tutorial -- 1995-1998. by Ian Foster, Gina Goff, Ehtesham Hayder, Chuck Koelbel(Some foils prepared by Kuck & Associates, Inc.)
1 Updates: parallel do invariant variables that are read then written
2 Place critical/ordered section around groups of updates
3 Pay attention to control flow
  • Make sure you don't branch in or out
  • Pull it outside loop or region if efficient
in Table To:

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