Discussion

Iterative methods are subject to several design decisions that affect ease of use of the software and the resulting performance. In this section I will give a global discussion of the issues involved, and how certain points are addressed in the packages under review.

 
• Preconditioners
  • About incomplete factorisation preconditioners
  • Preconditioners for sequential processing
  • Preconditioners for parallel iterative methods
• Data structure issues
  • The interface to user data
  • Parallel data layout
• High performance computing
  • Quotient graph computation
  • Inner products
• Language