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hakmem/docs/analysis
Moe Charm (CI) 8fdbc6d07e Phase 70-73: Route banner + observe stats consistency + WarmPool analysis SSOT
Observability infrastructure:
- Route Banner (ENV: HAKMEM_ROUTE_BANNER=1) for runtime configuration display
- Unified Cache consistency check (total_allocs vs total_frees)
- Verified counters are balanced (5.3M allocs = 5.3M frees)

WarmPool=16 comprehensive analysis:
- Phase 71: A/B test confirmed +1.31% throughput, 2.4x stability improvement
- Phase 73: Hardware profiling identified instruction reduction as root cause
  * -17.4M instructions (-0.38%)
  * -3.7M branches (-0.30%)
  * Trade-off: dTLB/cache misses increased, but instruction savings dominate
- Phase 72-0: Function-level perf record pinpointed unified_cache_push
  * Branches: -0.86% overhead (largest single-function improvement)
  * Instructions: -0.22% overhead

Key finding: WarmPool=16 optimization is control-flow based, not memory-hierarchy based.
Full analysis: docs/analysis/PHASE70_71_WARMPOOL16_ANALYSIS.md
2025-12-18 05:55:27 +09:00
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