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TODO.md

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Cache Simulator TODO List

This document outlines the planned enhancements and features for the Cache Simulator project. Tasks are organized by priority and implementation complexity.

High Priority

1. Multi-processor Simulation Support

  • Implement multi-core processor model
  • Add coherence traffic simulation between processors
  • Extend MESI protocol implementation for multi-processor interactions
  • Implement synchronization primitives simulation
  • Add statistical tracking for coherence traffic
  • Develop tests for multi-processor scenarios

2. Performance Optimization for Large Traces

  • Implement streaming/chunked trace processing
  • Add memory-efficient trace parsing
  • Optimize cache data structures for memory usage
  • Implement parallel simulation processing
  • Add progress reporting for long-running simulations
  • Create benchmarks for performance validation

3. Additional Replacement Policies

  • Implement FIFO (First-In-First-Out) policy
  • Implement NRU (Not Recently Used) policy
  • Add Random replacement policy
  • Implement PLRU (Pseudo-LRU) variants
  • Create a pluggable policy framework
  • Add comparative analysis tools for policy evaluation

Medium Priority

4. Victim Cache Implementation

  • Design victim cache structure
  • Implement victim cache lookups and updates
  • Add victim cache statistical tracking
  • Create configuration options for victim cache
  • Implement tests for victim cache behavior
  • Add documentation for victim cache usage

5. Different Write Policies

  • Implement write-through policy
  • Add no-write-allocate policy
  • Implement write-combining buffer
  • Create hybrid write policy options
  • Add statistical tracking for write behavior
  • Create tests for write policy validation

6. Hierarchical Inclusive/Exclusive Policies

  • Implement non-inclusive cache hierarchies
  • Add exclusive cache hierarchy option
  • Implement inclusive policy with back-invalidation
  • Create statistical tracking for inclusion effects
  • Add documentation for hierarchical policy options
  • Implement tests for hierarchy policies

Visualization and User Interface

7. Advanced Visualization

  • Implement more detailed text-based visualization
  • Add support for memory access pattern visualization
  • Create cache state visualization tools
  • Add statistical charting capabilities
  • Implement trace visualization tools
  • Add memory hierarchy visualization

8. GUI Development

  • Design a graphical user interface
  • Implement configuration panel
  • Add real-time simulation visualization
  • Implement results dashboard
  • Create interactive performance charts
  • Add trace generation and editing capabilities

Long-term / Research-oriented

9. Power and Area Modeling

  • Research and implement power consumption models
  • Add area estimation for different cache configurations
  • Create power/performance tradeoff analysis tools
  • Implement energy efficiency optimizations
  • Add thermal modeling capabilities
  • Create reporting for power and area metrics

10. Advanced Prefetching Algorithms

  • Implement Global History Buffer (GHB) prefetcher
  • Add Markov prefetcher implementation
  • Implement context-triggered prefetching
  • Add PC-based prefetching if trace format supports it
  • Create hybrid prefetching strategies
  • Implement machine learning-based prefetching

11. Integration with Other Simulators

  • Create interface to CPU simulators
  • Implement memory system interface
  • Add support for importing from other trace formats
  • Create export capabilities for simulation results
  • Add integration with performance visualization tools
  • Implement dynamic trace generation via instrumentation

Documentation and Community

12. Enhanced Documentation

  • Create comprehensive API documentation
  • Add more usage examples and tutorials
  • Create video demonstrations
  • Develop educational materials
  • Add research case studies
  • Create contributor guidelines

13. Community and Collaboration

  • Set up continuous integration
  • Add code quality metrics
  • Create contribution templates
  • Add project roadmap
  • Implement automated testing pipeline
  • Create community discussion platform

Implementation Notes

Each feature should be implemented with the following in mind:

  1. Backward compatibility: New features should not break existing functionality
  2. Configurability: Features should be configurable via command-line or config files
  3. Testing: Each feature should include comprehensive unit and integration tests
  4. Documentation: All features should be documented in the appropriate files
  5. Performance: Implementations should consider performance implications
  6. Modern C++: Use C++17 features appropriately

Completed Features

For reference, these features have already been implemented:

  • ✅ StreamBuffer class for sequential prefetching
  • ✅ Basic prefetching logic in the Cache class
  • ✅ Prefetching statistics in the MemoryHierarchy class
  • ✅ Basic stride-based prefetching
  • ✅ Adaptive prefetching implementation with the AdaptivePrefetcher class
  • ✅ MESI protocol implementation with the MESIProtocol class
  • ✅ Comprehensive test suite (unit tests and validation tests)
  • ✅ Trace generation and analysis tools
  • ✅ Configuration utilities and statistics tracking
  • ✅ LRU replacement policy implementation