Introduction
Explicit deallocation
Automatic dynamic memory management
Comparing garbage collection algorithms
A performance disadvantage?
Experimental methodology
Terminology and notation
Mark-Sweep Garbage Collection
The mark-sweep algorithm
The tricolor abstraction
Improving mark-sweep
Bitmap marking
Lazy sweeping
Cache misses in the marking loop
Issues to consider
Mark-Compact Garbage Collection
Two-finger compaction
The Lisp 2 algorithm
Threaded compaction
One-pass algorithms
Issues to consider
Copying Garbage Collection
Semispace copying collection
Traversal order and locality
Issues to consider
Reference Counting
Advantages and disadvantages of reference counting
Improving efficiency
Deferred reference counting
Coalesced reference counting
Cyclic reference counting
Limited-field reference counting
Issues to consider
Comparing Garbage Collectors
Throughput
Pause time
Space
Implementation
Adaptive systems
A unified theory of garbage collection
Allocation
Sequential allocation
Free-list allocation
Fragmentation
Segregated-fits allocation
Combining segregated-fits with first-, best-, and next-fit
Additional considerations
Allocation in concurrent systems
Issues to consider
Partitioning the Heap
Terminology
Why to partition
How to partition
When to partition
Generational Garbage Collection
Example
Measuring time
Generational hypotheses
Generations and heap layout
Multiple generations
Age recording
Adapting to program behavior
Inter-generational pointers
Space management
Older-first garbage collection
Beltway
Analytic support for generational collection
Issues to consider
Abstract generational garbage collection
Other Partitioned Schemes
Large object spaces
Topological collectors
Hybrid mark-sweep, copying collectors
Bookmarking garbage collection
Ulterior reference counting
Issues to consider
Run-Time Interface
Interface to allocation
Finding pointers
Object tables
References from external code
Stack barriers
GC safe points and mutator suspension
Garbage collecting code
Read- and write-barriers
Managing address space
Applications of virtual memory page protection
Choosing heap size
Issues to consider
Language-Specific Concerns
Finalization
Weak references
Issues to consider
Concurrency Preliminaries
Hardware
Hardware memory consistency models
Hardware primitives
Progress guarantees
Notation used for concurrent algorithms
Mutual exclusion
Work sharing and termination detection
Concurrent data structures
Transactional memory
Issues to consider
Parallel Garbage Collection
Is there sufficient work to parallelize?
Load balancing
Synchronization
Taxonomy
Parallel marking
Parallel copying
Parallel sweeping
Parallel compaction
Issues to consider
Concurrent Garbage Collection
Correctness of concurrent collection
Barrier techniques for concurrent collection
Issues to consider
Concurrent Mark-Sweep
Initialization
Termination
Allocation
Concurrent marking and sweeping
On-the-fly marking
Abstract concurrent collection
Issues to consider
Concurrent Copying and Compaction
Mostly concurrent copying: Baker’s algorithm
Brooks’ indirection barrier
Self-erasing read barriers
Replication copying
Multi-version copying
Sapphire
Concurrent compaction
Issues to consider
Concurrent Reference Counting
Simple reference counting revisited
Buffered reference counting
Concurrent, cyclic reference counting
Taking a snapshot of the heap
Sliding views reference counting
Issues to consider
Real-Time Garbage Collection
Real-time systems
Scheduling real-time collection
Work-based real-time collection
Slack-based real-time collection
Time-based real-time collection: Metronome
Combining scheduling approaches: Tax-and-Spend
Controlling fragmentation
Issues to consider
Glossary
Bibliography
Index
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