IBM Systems Journal - 2002 Copyright

IBM Skip to main content
  Home     Products & services     Support & downloads     My account  

  Select a country  
Journals Home  
  Systems Journal  
    Current Issue  
    Recent Issues  
    Papers in Progress  
    Search/Index  
    Orders  
    Description  
    Author's Guide  
Journal of Research
and Development
  Staff  
  Contact Us  
  Related links:  
     IBM Research  

IBM Journal of Research and Development  
Volume 27, Number 4, Page 453 (1988)
Numericaly Intensive Computing
  Full article: arrowPDF   arrowCopyright info





   

Programming style on the IBM 3090 Vector Facility considering both performance and flexibility

by H. Samukawa
To obtain high performance from the IBM 3090 Vector Facility, we must investigate vector instruction constructs in terms of the loop context of the application algorithm. We exemplify the method by linear algebra subroutines for basic matrix operations and a linear equation solver. In these examples, we clarify the mathematical meaning that each loop is computed by analyzing the loops in terms of a generic algorithm. This analysis helps us to achieve optimal loop selection. We then obtain additional performance gain by considering cache capacity. These procedures suggest that there are three levels of performance classification. They also show that program structure yields great benefits in terms of performance and generality of the program.
Related Subjects: Mathematical Methods; Programming