Moe Charm (CI) 8553894171 Larson double-free investigation: Enhanced diagnostics + Remove buggy drain pushback ...

**Problem**: Larson benchmark crashes with TLS_SLL_DUP (double-free), 100% crash rate in debug

**Root Cause**: TLS drain pushback code (commit c2f104618) created duplicates by
pushing pointers back to TLS SLL while they were still in the linked list chain.

**Diagnostic Enhancements** (ChatGPT + Claude collaboration):
1. **Callsite Tracking**: Track file:line for each TLS SLL push (debug only)
   - Arrays: g_tls_sll_push_file[], g_tls_sll_push_line[]
   - Macro: tls_sll_push() auto-records __FILE__, __LINE__

2. **Enhanced Duplicate Detection**:
   - Scan depth: 64 → 256 nodes (deep duplicate detection)
   - Error message shows BOTH current and previous push locations
   - Calls ptr_trace_dump_now() for detailed analysis

3. **Evidence Captured**:
   - Both duplicate pushes from same line (221)
   - Pointer at position 11 in TLS SLL (count=18, scanned=11)
   - Confirms pointer allocated without being popped from TLS SLL

**Fix**:
- **core/box/tls_sll_drain_box.h**: Remove pushback code entirely
  - Old: Push back to TLS SLL on validation failure → duplicates!
  - New: Skip pointer (accept rare leak) to avoid duplicates
  - Rationale: SuperSlab lookup failures are transient/rare

**Status**: Fix implemented, ready for testing

**Updated**:
- LARSON_DOUBLE_FREE_INVESTIGATION.md: Root cause confirmed

2025-11-27 07:30:32 +09:00

..

100K_SEGV_ROOT_CAUSE_FINAL.md

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ACE_INVESTIGATION_REPORT.md

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ACE_PHASE1_TEST_RESULTS.md

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ACE_POOL_ARCHITECTURE_INVESTIGATION.md

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ANALYSIS_INDEX.md

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ANALYSIS_SUMMARY.md

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ATOMIC_FREELIST_SUMMARY.md

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BASELINE_PERF_MEASUREMENT.md

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BENCH_FIXED_SIZE_WORKSET64_CRASH_REPORT.md

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BENCHMARK_SUMMARY_20251122.md

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BITMAP_FIX_FAILURE_ANALYSIS.md

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BOTTLENECK_ANALYSIS_REPORT_20251114.md

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BOTTLENECK_ANALYSIS_TASK.md

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BOX_THEORY_ARCHITECTURE_REPORT.md

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BOX_THEORY_EXECUTIVE_SUMMARY.md

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BOX_THEORY_VERIFICATION_REPORT.md

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BOX_THEORY_VERIFICATION_SUMMARY.md

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BRANCH_PREDICTION_OPTIMIZATION_REPORT.md

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BUG_FLOW_DIAGRAM.md

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C2_CORRUPTION_ROOT_CAUSE_FINAL.md

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C6_TLS_SLL_HEAD_CORRUPTION_ROOT_CAUSE.md

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C7_TLS_SLL_CORRUPTION_ANALYSIS.md

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C7_TLS_SLL_CORRUPTION_FIX_REPORT.md

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CHATGPT_CONSULTATION_MMAP.md

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CHATGPT_FEEDBACK.md

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CHATGPT_PRO_BATCH_ANALYSIS.md

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CHATGPT_PRO_RESPONSE_MMAP.md

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CHATGPT_PRO_ULTRATHINK_RESPONSE.md

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CHATGPT_ULTRA_THINK_ANALYSIS.md

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CLEANUP_SUMMARY_2025_11_01.md

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COMPREHENSIVE_BENCHMARK_ANALYSIS.md

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COMPREHENSIVE_BENCHMARK_REPORT_20251122.md

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CRITICAL_BUG_REPORT.md

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DEBUG_100PCT_STABILITY.md

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debug_analysis_final_$(date +%Y%m%d_%H%M%S).md

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DEBUG_LOGGING_POLICY.md

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DESIGN_FLAWS_ANALYSIS.md

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DESIGN_FLAWS_SUMMARY.md

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ENV_CLEANUP_ANALYSIS.md

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ENV_CLEANUP_PLAN.md

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ENV_CLEANUP_SUMMARY.md

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ENV_CONSOLIDATION_PLAN.md

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ENV_QUICK_REFERENCE.md

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FALSE_POSITIVE_REPORT.md

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FALSE_POSITIVE_SEGV_FIX.md

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FAST_CAP_0_SEGV_ROOT_CAUSE_ANALYSIS.md

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FINAL_ANALYSIS_C2_CORRUPTION.md

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FREE_INC_SUMMARY.md

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FREE_PATH_INVESTIGATION.md

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FREE_PATH_ULTRATHINK_ANALYSIS.md

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FREE_TO_SS_INVESTIGATION_INDEX.md

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FREE_TO_SS_SEGV_INVESTIGATION.md

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FREELIST_CORRUPTION_ROOT_CAUSE.md

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GEMINI_BIGCACHE_ANALYSIS.md

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HAKMEM_CONFIG_SUMMARY.md

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HOTPATH_PERFORMANCE_INVESTIGATION.md

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HYBRID_BITMAP_MAGAZINE_ANALYSIS.md

Debug Counters Implementation - Clean History

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INVESTIGATION_RESULTS.md

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INVESTIGATION_SUMMARY.md

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L1D_ANALYSIS_INDEX.md

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L1D_CACHE_MISS_ANALYSIS_REPORT.md

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L1D_CACHE_MISS_EXECUTIVE_SUMMARY.md

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L1D_CACHE_MISS_HOTSPOT_DIAGRAM.md

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L1D_OPTIMIZATION_QUICK_START_GUIDE.md

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LARGE_FILES_ANALYSIS.md

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LARSON_CATASTROPHIC_SLOWDOWN_ROOT_CAUSE.md

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LARSON_CRASH_ROOT_CAUSE_REPORT.md

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LARSON_DOUBLE_FREE_INVESTIGATION.md

Larson double-free investigation: Enhanced diagnostics + Remove buggy drain pushback

2025-11-27 07:30:32 +09:00

LARSON_INVESTIGATION_SUMMARY.md

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LARSON_OOM_ROOT_CAUSE_ANALYSIS.md

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LARSON_PERFORMANCE_ANALYSIS_2025_11_05.md

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LARSON_SLOWDOWN_INVESTIGATION_REPORT.md

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LEARNING_BENCHMARK_TASK.md

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LRU_CACHE_MMAP_ROOT_CAUSE_ANALYSIS.md

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MALLOC_FALLBACK_REMOVAL_REPORT.md

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MEMORY_OVERHEAD_ANALYSIS.md

Debug Counters Implementation - Clean History

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MID_LARGE_FINAL_AB_REPORT.md

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MID_LARGE_LOCK_CONTENTION_ANALYSIS.md

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MID_LARGE_MINCORE_AB_TESTING_SUMMARY.md

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MID_LARGE_MINCORE_INVESTIGATION_REPORT.md

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MID_LARGE_P0_FIX_REPORT_20251114.md

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MID_LARGE_P0_PHASE_REPORT.md

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MID_MT_COMPLETION_REPORT.md

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MIMALLOC_ANALYSIS_REPORT.md

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MIMALLOC_SMALL_ALLOC_ANALYSIS.md

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OPTIMIZATION_QUICK_SUMMARY.md

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OPTIMIZATION_REPORT_2025_11_12.md

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OVERHEAD_ANALYSIS_PLAN.md

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P0_DIRECT_FC_ANALYSIS.md

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P0_DIRECT_FC_SUMMARY.md

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P0_INVESTIGATION_FINAL.md

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P0_ROOT_CAUSE_FOUND.md

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P0_SEGV_ANALYSIS.md

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PAGE_BOUNDARY_SEGV_FIX.md

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PERF_ANALYSIS_2025_11_05.md

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PERF_ANALYSIS_INDEX.md

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PERF_ANALYSIS_RESULTS.md

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PERF_BASELINE_FRONT_DIRECT.md

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PERF_POST_GETENV_ANALYSIS.md

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PERFORMANCE_DROP_INVESTIGATION_2025_11_21.md

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PERFORMANCE_INVESTIGATION_REPORT.md

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PERFORMANCE_REGRESSION_INVESTIGATION_REPORT.md

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PHASE1_EXECUTIVE_SUMMARY.md

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PHASE1_REFILL_INVESTIGATION.md

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PHASE2A_IMPLEMENTATION_REPORT.md

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PHASE2B_IMPLEMENTATION_REPORT.md

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PHASE2C_IMPLEMENTATION_REPORT.md

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PHASE4_REGRESSION_ANALYSIS.md

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PHASE6_3_FIX_SUMMARY.md

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PHASE6_3_REGRESSION_ULTRATHINK.md

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PHASE6_RESULTS.md

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PHASE7_BENCHMARK_PLAN.md

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PHASE7_BUG3_FIX_REPORT.md

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PHASE7_BUG_FIX_REPORT.md

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PHASE7_COMPREHENSIVE_BENCHMARK_RESULTS.md

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PHASE7_CRITICAL_FINDINGS_SUMMARY.md

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PHASE7_FINAL_BENCHMARK_RESULTS.md

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PHASE7_PERFORMANCE_INVESTIGATION_REPORT.md

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PHASE7_QUICK_BENCHMARK_RESULTS.md

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PHASE7_SUMMARY.md

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PHASE7_SYSCALL_BOTTLENECK_ANALYSIS.md

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PHASE7_TASK3_RESULTS.md

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PHASE11_SUPERSLAB_PREWARM_IMPLEMENTATION_REPORT.md

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PHASE12_SP_SLOT_BOX_IMPLEMENTATION_REPORT.md

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PHASE15_BUG_ANALYSIS.md

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PHASE15_BUG_ROOT_CAUSE_FINAL.md

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PHASE15_REGISTRY_LOOKUP_INVESTIGATION.md

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PHASE19_AB_TEST_RESULTS.md

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PHASE23_CAPACITY_OPTIMIZATION_RESULTS.md

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PHASE_6.7_OVERHEAD_ANALYSIS.md

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PHASE_6.8_REGRESSION_ANALYSIS.md

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PHASE_6.11.4_THREADING_COST_ANALYSIS.md

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PHASE_6.11.5_FAILURE_ANALYSIS.md

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PHASE_B_COMPLETION_REPORT.md

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PHASE_E3_SEGV_ROOT_CAUSE_REPORT.md

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PHASE_E3-1_INVESTIGATION_REPORT.md

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PHASE_E3-1_SUMMARY.md

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POINTER_CONVERSION_BUG_ANALYSIS.md

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POINTER_FIX_SUMMARY.md

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POOL_HOT_PATH_BOTTLENECK.md

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POOL_TLS_INVESTIGATION_FINAL.md

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POOL_TLS_SEGV_INVESTIGATION.md

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POOL_TLS_SEGV_ROOT_CAUSE.md

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2025-11-26 13:14:18 +09:00

QUICK_WINS_ANALYSIS.md

Debug Counters Implementation - Clean History

2025-11-05 12:31:14 +09:00

RANDOM_MIXED_BOTTLENECK_ANALYSIS.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00

RANDOM_MIXED_SUMMARY.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00

README_MIMALLOC_ANALYSIS.md

Debug Counters Implementation - Clean History

2025-11-05 12:31:14 +09:00

REFACTOR_EXECUTIVE_SUMMARY.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00

REFACTOR_SUMMARY.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00

REFACTORING_BOX_ANALYSIS.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

RELEASE_DEBUG_OVERHEAD_REPORT.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

REMAINING_BUGS_ANALYSIS.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

RING_SIZE_DEEP_ANALYSIS.md

Debug Counters Implementation - Clean History

2025-11-05 12:31:14 +09:00

SAFE_TO_DELETE_ENV_VARS.md

ENV cleanup: Consolidate SFC_DEBUG getenv() calls (86% reduction)

2025-11-27 03:18:33 +09:00

SANITIZER_INVESTIGATION_REPORT.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

SANITIZER_PHASE1_RESULTS.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00

SEGFAULT_INVESTIGATION_REPORT.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

SEGFAULT_ROOT_CAUSE_FINAL.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

SEGV_FIX_REPORT.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

SEGV_FIX_SUMMARY.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

SEGV_ROOT_CAUSE_COMPLETE.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

SFC_ROOT_CAUSE_ANALYSIS.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

SLAB_INDEX_FOR_INVESTIGATION.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

SLL_REFILL_BOTTLENECK_ANALYSIS.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

STRUCTURAL_ANALYSIS.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

TESTABILITY_ANALYSIS.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

TINY_256B_1KB_SEGV_FIX_REPORT.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

TINY_DRAIN_INTERVAL_AB_REPORT.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00

TINY_PERF_PROFILE_EXTENDED.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00

TINY_PERF_PROFILE_STEP1.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00

ULTRATHINK_ANALYSIS_2025_11_07.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

ULTRATHINK_ANALYSIS.md

Wrap debug fprintf in !HAKMEM_BUILD_RELEASE guards (Release build optimization)

2025-11-26 13:14:18 +09:00

ULTRATHINK_BENCHMARK_ANALYSIS.md

Debug Counters Implementation - Clean History

2025-11-05 12:31:14 +09:00

ULTRATHINK_O1_OPTIMIZATION_ANALYSIS.md

Debug Counters Implementation - Clean History

2025-11-05 12:31:14 +09:00

ULTRATHINK_SLAB_REGISTRY_ANALYSIS.md

Debug Counters Implementation - Clean History

2025-11-05 12:31:14 +09:00

ULTRATHINK_SUMMARY.md

ENV cleanup: Remove BG/HotMag vars & guard fprintf (Larson 52.3M ops/s)

2025-11-26 14:45:26 +09:00