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Swap Token: Rethink the Application of the LRU Principle on Paging to Remove System Thrashing
Abstract
A prototype implementation of the swap token mechanism in the Linux kernel as well as some experiment measurements are presented. The experiment results show that the mechanism can consistently reduce the program execution slowdown in a multiprogramming environment including SPEC2000 programs and other memory-intensive applications by up to 67%. The slowdown reductions mainly come from reductions of up to 95% of total page faults during program interactions. This chapter also shows that the mechanism introduces little overhead to program executions, and its implementations on Linux (and Unix) systems are straightforward.
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