Phantom OS and Java: Garbage Collection
summary
The talk examines running Java on the Phantom OS, focusing on the bytecode translation challenges caused by differences between Phantom’s VM and the Java VM: generating and validating constructors, performing static method calls, runtime type checks, and implementing classes referenced by the Java code generator. It also addresses garbage collection for persistent, terabyte-scale memory, proposing two concurrent collectors — a fast partial collector and a slow full collector — to suit persistent storage sizes and requirements.
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chapters (13)
- 0:00Introduction
- 2:50Phantom OS concept vs Unix
- 9:09Persistent memory snapshots
- 19:31Garbage collection problems
- 22:03Offline GC via snapshots
- 27:03Fast and slow GC
- 30:54Reference counting issues and fix
- 33:21Large objects and snapshots
- 41:31Disk failure recovery
- 46:10Versioning and updates
- 49:23Comparison with traditional OS
- 56:06Performance and optimizations
- 57:11Download and try
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