Global garbage collection for distributed heap storage systems
The authors present a garbage-collection algorithm, suitable for loosely-coupled multi-processor systems, in which the processing elements (PEs) share only the communication medium. The algorithm is global, i.e., it involves all the PEs in the system. It allows space compaction, and it uses a system-wide marking phase to mark all accessible objects where a combination of parallel breadth-first/depth-first strategies is used for tracing the object-graphs according to a decentralized credit mechanism that regulates the number of garbage collections messages in the system. The credit mechanism is crucial for determining the space requirement of the garbage-collection messages. Also a variation of this algorithm is presented for systems with high locality of reference. It allows each PE to perform first its local garbage collection and only invokes the global garbage collection when the freed space by the local collector is insufficient.
- Research Organization:
- Swedish Institute of Computer Science, Spanga
- OSTI ID:
- 5371037
- Journal Information:
- Int. J. Parallel Program.; (United States), Journal Name: Int. J. Parallel Program.; (United States) Vol. 15:5; ISSN IJPPE
- Country of Publication:
- United States
- Language:
- English
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