Helping gold three silver four: Ali's first JVM garbage collection algorithm advanced notes, algorithm principles + bottom-level implementations fly together

This article is an in-depth understanding of the underlying principles of the Java virtual machine, and a detailed interpretation of the garbage collection algorithm G1GC in JVM memory management. This note is divided into two parts: "Algorithm" and "Implementation": The first part mainly introduces the algorithm principle of G1GC, including the concurrent marking of G1GC, transfer function, soft real-time realization and generational G1GC mode; the latter part The implementation part that is not explained in detail in the focus algorithm chapter, based on the HotSpotVM source code, explains the object management function, the mechanism of the memory allocator, the thread management method and the specific implementation of G1GC.

Note highlights

1. 90 charts + 33 pieces of code, easy to understand the principle of G1GC algorithm
2. HotSpotVM source code analysis, in-depth discussion of the specific implementation of G1GC
3. In-depth understanding of the underlying principles of the Java virtual machine, detailed interpretation of the classic GC algorithm
4. Combining theory with practice, discussing specific implementation based on HotSpotVM source code
5. The pictures and texts are well explained in a simple way, supplemented by detailed explanations with a large number of illustrations and codes.

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Chapter Table of Contents

 

 

 

 

 

 

 

 

 

Premium content excerpts

 

Brief description of the implementation process

 

Code structure

 

Parallel GC execution example

 

Mean attenuation

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