Optimizing your code

Aside from optimization flags, it pays to learn how to optimize one's code both in terms of writing better code (hand-optimizing) as well as better algorithms for the particular task at hand and computer one uses. Here are a few links that might be of use, covering both the subject of compiler optimizations as well as those above:

• (mainly Sun related) optimization information:
  • Performance Optimisation mainly for Fortran codes, but usefull for others as well, from EPCC.
• (mainly SGI related) optimization information:
  • Training Material for Power Challenge 10000
  • Power Challenge related information at SGI Urbana.
  • PowerLearn: A Seminar on Achieving High Performance and Parallelism with Silicon Graphics Power Challenge Systems
  • IRIX 6.2 Bookshelf
  • SGI Online manuals from OSC
• (mainly IBM related) optimization information from CTC:
  • Performance Basics
  • Single Processor Performance Tools
  • Single-Processor Performance Considerations for the SP2
  • LAB: Optimizing on a Single Processor
  • Timing and Optimizing a Fortran Program
  • Optimization and Timing: Lab Exercises
• (mainly IBM related) optimization information from MHPCC:
  • SP Parallel Programming Workshop Performance Tuning
  • Information about timers