hakmem

tomoaki/hakmem

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Author	SHA1	Message	Date
Moe Charm (CI)	d378ee11a0	Phase 15: Box BenchMeta separation + ExternalGuard debug + investigation report - Implement Box BenchMeta pattern in bench_random_mixed.c (BENCH_META_CALLOC/FREE) - Add enhanced debug logging to external_guard_box.h (caller tracking, FG classification) - Document investigation in PHASE15_BUG_ANALYSIS.md Issue: Page-aligned MIDCAND pointer not in SuperSlab registry → ExternalGuard → crash Hypothesis: May be pre-existing SuperSlab bug (not Phase 15-specific) Next: Test in Phase 14-C to verify	2025-11-15 23:00:21 +09:00
Moe Charm (CI)	cef99b311d	Phase 15: Box Separation (partial) - Box headers completed, routing deferred Status: Box FG V2 + ExternalGuard 実装完了、hak_free_at routing は Phase 14-C に revert Files Created: 1. core/box/front_gate_v2.h (98 lines) - Ultra-fast 1-byte header classification (TINY/POOL/MIDCAND/EXTERNAL) - Performance: 2-5 cycles - Same-page guard added (防御的プログラミング) 2. core/box/external_guard_box.h (146 lines) - ENV-controlled mincore safety check - HAKMEM_EXTERNAL_GUARD_MINCORE=0/1 (default: OFF) - Uses __libc_free() to avoid infinite loop Routing: - hak_free_at reverted to Phase 14-C (classify_ptr-based, stable) - Phase 15 routing caused SEGV on page-aligned pointers Performance: - Phase 14-C (mincore ON): 16.5M ops/s (stable) - mincore: 841 calls/100K iterations - mincore OFF: SEGV (unsafe AllocHeader deref) Next Steps (deferred): - Mid/Large/C7 registry consolidation - AllocHeader safety validation - ExternalGuard integration Recommendation: Stick with Phase 14-C for now - mincore overhead acceptable (~1.9ms / 100K) - Focus on other bottlenecks (TLS SLL, SuperSlab churn) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>	2025-11-15 22:08:51 +09:00

Author

SHA1

Message

Date

Moe Charm (CI)

d378ee11a0

Phase 15: Box BenchMeta separation + ExternalGuard debug + investigation report

- Implement Box BenchMeta pattern in bench_random_mixed.c (BENCH_META_CALLOC/FREE)
- Add enhanced debug logging to external_guard_box.h (caller tracking, FG classification)
- Document investigation in PHASE15_BUG_ANALYSIS.md

Issue: Page-aligned MIDCAND pointer not in SuperSlab registry → ExternalGuard → crash
Hypothesis: May be pre-existing SuperSlab bug (not Phase 15-specific)
Next: Test in Phase 14-C to verify

2025-11-15 23:00:21 +09:00

Moe Charm (CI)

cef99b311d

Phase 15: Box Separation (partial) - Box headers completed, routing deferred

**Status**: Box FG V2 + ExternalGuard 実装完了、hak_free_at routing は Phase 14-C に revert

**Files Created**:
1. core/box/front_gate_v2.h (98 lines)
   - Ultra-fast 1-byte header classification (TINY/POOL/MIDCAND/EXTERNAL)
   - Performance: 2-5 cycles
   - Same-page guard added (防御的プログラミング)

2. core/box/external_guard_box.h (146 lines)
   - ENV-controlled mincore safety check
   - HAKMEM_EXTERNAL_GUARD_MINCORE=0/1 (default: OFF)
   - Uses __libc_free() to avoid infinite loop

**Routing**:
- hak_free_at reverted to Phase 14-C (classify_ptr-based, stable)
- Phase 15 routing caused SEGV on page-aligned pointers

**Performance**:
- Phase 14-C (mincore ON): 16.5M ops/s (stable)
- mincore: 841 calls/100K iterations
- mincore OFF: SEGV (unsafe AllocHeader deref)

**Next Steps** (deferred):
- Mid/Large/C7 registry consolidation
- AllocHeader safety validation
- ExternalGuard integration

**Recommendation**: Stick with Phase 14-C for now
- mincore overhead acceptable (~1.9ms / 100K)
- Focus on other bottlenecks (TLS SLL, SuperSlab churn)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-15 22:08:51 +09:00

2 Commits