Multi-section Garbage Collection via Load-Monitored Region Register
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Solution Overview
Problem
Garbage collection processes in runtime environments, such as Java virtual machines, typically pause all operations, leading to significant response time delays and performance impact, especially when memory fragmentation occurs and compaction is necessary.
Innovation Solution
Implementing a method that performs garbage collection without pausing the runtime environment by using a load-monitored region register and event-based branch handling, allowing objects to be moved in the background while enabling CPU instructions to load pointers and relocate objects within memory regions undergoing garbage collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional garbage collection process is performed, then memory fragmentation is reduced and memory management is improved, but execution of the runtime environment is paused causing significant response time delays
Solution Approach 1:
The memory region is divided into multiple sub-regions, and garbage collection is performed on individual sub-regions rather than the entire memory space at once. This allows other operations to continue in non-collected sub-regions, eliminating full pauses while still managing memory fragmentation effectively.
Solution Approach 2:
A load-monitored region register is预先 configured to identify which memory sub-region should undergo garbage collection next. This preliminary setup enables the system to switch between sub-regions without pausing, as the next collection target is already determined and registered.
2Reliability
If garbage collection is performed on the entire memory region, then all fragmented memory is consolidated, but all other operations must cease during the process
Solution Approach 1:
The memory region is segmented into multiple collectable sub-regions, allowing garbage collection to be performed on one sub-region at a time while other sub-regions remain operational. This maintains productivity during memory consolidation activities.
Solution Approach 2:
The system dynamically switches between different memory sub-regions for garbage collection based on the load-monitored region register. This dynamic approach allows the garbage collector to work on one sub-region while applications continue to use other sub-regions, maintaining operational continuity.
3Quantity of substance
If memory objects are moved during compaction, then large free areas are created for new objects, but the process requires stopping all other JVM operations
Solution Approach 1:
Memory compaction is performed on segmented sub-regions rather than the entire memory space. Objects are moved within or between sub-regions in a controlled manner that allows other transactions to continue in unaffected sub-regions, maintaining response time while still creating free memory areas.
Solution Approach 2:
The load-monitored region register acts as an intermediary that coordinates object movement between sub-regions. It tracks which sub-region is currently being collected and manages the transition of objects, allowing seamless compaction without requiring global operation cessation.
Data Source
AI summary
A method and apparatus for garbage collection is disclosed herein. The method includes performing a garbage collection process without pausing execution of a runtime environment. The method also includes executing a first CPU instruction to load a first pointer that points to a first location in a first region of memory, where the first region of memory is undergoing garbage collection. The method also includes moving a first object pointed to by the first pointer from the first location in memory to a second location in memory.