Abstract

Adaptive algorithms are capable of modifying their own behavior through time, depending on the execution characteristics. Recently, we have proposed LRU-WAR, an adaptive replacement algorithm whose objective is to minimize failures detected in LRU policy, preserving its simplicity and low overhead. In this paper, we present our contribution to the study of adaptive replacement algorithms describing their behavior under a number of workloads. Simulations include an analysis of the performance sensibility with the variation of the control parameters and its application in a multiprogrammed environment. In order to address LRU-WAR weakness as a global policy, we also introduce LRU-WARlock. The simulation results show that substantial performance improvements can be obtained.

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