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Title |
Memory Organization and Optimization for Java Workloads |
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Author |
K. F. Chong, Anthony S. Fong |
| Citation |
Vol. 6 No. 11 pp. 284-291 |
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Abstract |
Java has become a popular paradigm in software development. It is widely used in embedded systems and network computing because of its excellent robustness, modularity and security. Its built-in garbage collection automatically reclaims unused memory space. Current generational garbage collector works well with programs containing massive short-lived objects. However, the existence of hot-mature (frequently-accessed and long-lived) objects inhibits object reclamation. In this paper, we present two methodologies to exploit the locality for these objects. Firstly, we employ an on-chip scratchpad memory in memory hierarchy to preserve young and hot-mature objects. This reduces energy consumption and data accessing cycles for Java execution. Secondly, we introduce a pretenuring technique to segregate objects into separated memory regions based on object lifetimes and reference densities, which minimizes the amount of object copying during garbage collections. |
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Keywords |
Cache and memory systems, Java, memory management, high-performance computer architecture |
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