Tuning Automatically-Parallelized Code

Potential hand improvements are due to

• limitations in compiler techniques. E.g.,

  • array reductions are parallelized by only few compilers

• insufficient information available to the compiler. E.g.,

  • loop iteration range may be input data
  • variables are defined in other subroutines (no interprocedural analysis)
    

Previous slide

Next slide

Back to first slide

View graphic version