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- W2079366392 abstract "This paper introduces <i>dynamic</i> object colocation, an optimization to reduce copying costs in generational and other incremental garbage collectors by allocating connected objects together in the same space. Previous work indicates that connected objects belong together because they often have similar lifetimes. Generational collectors, however, allocate all new objects in a <i>nursery</i> space. If these objects are connected to data structures residing in the <i>mature</i> space, the collector must copy them. Our solution is a cooperative optimization that exploits compiler analysis to make runtime allocation decisions. The compiler analysis discovers potential object connectivity for newly allocated objects. It then replaces these allocations with calls to <i>coalloc</i>, which takes an extra parameter called the <i>colocator</i> object. At runtime, coalloc determines the location of the colocator and allocates the new object together with it in either the nursery or mature space. Unlike pretenuring, colocation makes precise per-object allocation decisions and does not require lifetime analysis or allocation site homogeneity. Experimental results for SPEC Java benchmarks using Jikes RVM show colocation can reduce garbage collection time by 50% to 75%, and total performance by up to 1%." @default.
- W2079366392 created "2016-06-24" @default.
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- W2079366392 date "2004-10-01" @default.
- W2079366392 modified "2023-10-17" @default.
- W2079366392 title "Finding your cronies" @default.
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- W2079366392 doi "https://doi.org/10.1145/1028976.1028996" @default.
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