Concurrent non-deferred reference counting on the microgrid : first experiences

Herhut, Stephan, Joslin, C., Scholz, Sven-Bodo, Poss, R and Grelck, Clemens (2011) Concurrent non-deferred reference counting on the microgrid : first experiences. Lecture Notes in Computer Science (LNCS). pp. 185-202. ISSN 0302-9743
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We present a first evaluation of our novel approach for non-deferred reference counting on the Microgrid many-core architecture. Non-deferred reference counting is a fundamental building block of implicit heap management of functional array languages in general and Single Assignment C in particular. Existing lock-free approaches for multi-core and SMP settings do not scale well for large numbers of cores in emerging many-core platforms. We, instead, employ a dedicated core for reference counting and use asynchronous messaging to emit reference counting operations. This novel approach decouples computational workload from reference-counting overhead.

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