Chapter 7: OpenACC Basics

Here we will start with a simple example, vector addition, to illustrate the use of a new compiler, pgcc and code that contains pragmas from a new standard, OpenACC.

• 7.0 OpenACC : A new standard and compiler
  • A new compiler
  • Vector Addition as a basic example
• 7.1 Sequential versions with 2 compilers
  • Command line argument handling
  • Helper functions used by each example
  • Sequential main program: gcc compiler
  • Sequential main program: pgcc compiler
  • Same code, two compilers
• 7.2 OpenMP code with gcc and pgcc
  • Command line and helper functions
  • The gcc version
  • The pgcc version
• 7.3 Fast multicore code with new pgcc compiler
  • Same Command line and helper functions as before
  • The OpenACC multicore code
  • Added compiler information
  • Which is best?
• 7.4 GPU device code using OpenACC pragmas with the pgcc compiler
  • Same Command line and helper functions as before
  • Important point

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