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Phase 3 C3: Tiny Static Routing Box Implementation (Step 1A)
Research Box Implementation:
- core/box/tiny_static_route_box.h: TinyStaticRoute struct & API
- core/box/tiny_static_route_box.c: Static route table management
- Makefile: Added tiny_static_route_box.o to 3 OBJS lists
Design:
- ENV gate: HAKMEM_TINY_STATIC_ROUTE=0/1 (default: 0)
- Learner auto-disable: If HAKMEM_TINY_LEARNER_ENABLED=1, force OFF
- Constructor priority: 102 (runs after wrapper_env_ctor at 101)
- Thread-safe: Atomic CAS for exactly-once initialization
Baseline Profiling (Step 0 Complete):
- Throughput: 46.2M ops/s (10M iterations × 400 ws)
- Instructions/cycle: 2.11 insn/cycle
- Frontend stalls: 10.62% (memory latency bottleneck)
- Cache-misses: 3.46% of references
Expected C3 gain: +5-8% (policy_snapshot bypass)
Next Steps (Step 1B onwards):
1. Integrate static route into malloc_tiny_fast_for_class()
2. A/B test: Mixed 10-run, expect +1% minimum for GO
3. Decision: GO if +1%, NO-GO if -1%, else freeze
Status:
✅ Phase 2 (B3+B4): +4.4% cumulative
✅ Phase 3 planning & C3 Step 0-1A complete
⏳ Phase 3 C3 Step 1B-3 pending (malloc integration & testing)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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2025-12-13 18:04:14 +09:00 |
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