Don't race the memory bus: taming the GC leadfoot

Don't race the memory bus: taming the GC leadfoot
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不要与内存总线竞争:驯服 GC 前脚

DOI:
10.1145/2754169.2754182
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发表时间:
2015
期刊:
ACM SIGPLAN International Symposium on Memory Management
影响因子:
--
通讯作者:
Vick, Christopher A.
Vick, Christopher A.
中科院分区:
--
文献类型:
--
作者:
Hussein, Ahmed;Hosking, Antony L.;Payer, Mathias;Vick, Christopher A.

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Dynamic voltage and frequency scaling (DVFS) is ubiquitous on mobile devices as a mechanism for saving energy. Reducing the clock frequency of a processor allows a corresponding reduction in power consumption, as does turning off idle cores. Garbage collection is a canonical example of the sort of memory-bound workload that best responds to such scaling. Here, we explore the impact of frequency scaling for garbage collection in a real mobile device running Android's Dalvik virtual machine, which uses a concurrent collector. By controlling the frequency of the core on which the concurrent collector thread runs we can reduce power significantly. Running established multi-threaded benchmarks shows that total processor energy can be reduced up to 30%, with end-to-end performance loss of at most 10%.
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