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Phase v11a-1: Infrastructure - Multi-class segment and learner v2 box definitions
Create core box definitions for MID v3.5 consolidation (Phase v11a):
1. smallobject_segment_mid_v3_box.h
- Multi-class unified segment (2MiB, C5-C7)
- Per-class free page stacks
- SmallHeapCtx_MID_v3 for TLS caching
- Refill/retire/validation APIs
2. smallobject_stats_mid_v3_box.h
- SmallPageStatsMID_v3: per-page lifetime stats
- Aggregation for Learner input
- Free hit ratio tracking (basis points)
3. smallobject_learner_v2_box.h
- SmallLearnerStatsV2: multi-class and global metrics
- Extended from v7 (C5-only ratio) to full workload analysis
- Per-class retire efficiency, global free hit ratio
- Decision API for route optimization
4. smallobject_policy_v2_box.h
- SmallPolicyV2: routing with Learner integration
- Version-based TLS cache invalidation
- Route update from Learner stats
- Backward compatible with v1 interface
Dependency graph:
segment → stats → learner → policy → malloc routing
Architecture Decision: Option A (MID v3.5 consolidation)
- v7 frozen as C5/C6-only research preset
- MID v3.5 becomes 257-1KiB main implementation
- Learner scope: multi-class tracking (C5 ratio primary, Phase v11a)
- Future (v11b): multi-dimensional optimization
🤖 Generated with Claude Code
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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2025-12-12 06:20:01 +09:00 |
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