Skewed associativity enhances performance predictability

François Bodin 1 André Seznec 1
1 CAPS - Compilation, parallel architectures and system
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, Inria Rennes – Bretagne Atlantique
Abstract : Performance tuning becomes harder as computer technology advances. One of the factors is the increasing complexity of memory hierarchies. Most modern machines now use at least one level of cache memory. To reduce execution stalls, cache misses must be very low. Software techniques used to improve locality have been developped for numerical codes, such as loop blocking and copying. Unfortunately, the behavior of direct mapped and set associative caches is still erratic when large numerical data is accessed. Execution time can vary drasticly for the same loop kernel depending on uncontrolled factors such as array leading size. The only software method available to improve execution time stability is the copying of frequently used data, which is costly in execution time. Users are not usually cache organisation experts. They are not aware of such phenomena, and have no control over it.
Type de document :
[Research Report] RR-2499, INRIA. 1995
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Contributeur : Rapport de Recherche Inria <>
Soumis le : mercredi 24 mai 2006 - 14:40:59
Dernière modification le : vendredi 16 novembre 2018 - 01:22:08
Document(s) archivé(s) le : lundi 5 avril 2010 - 00:06:29



  • HAL Id : inria-00074177, version 1


François Bodin, André Seznec. Skewed associativity enhances performance predictability. [Research Report] RR-2499, INRIA. 1995. 〈inria-00074177〉



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