hakmem

tomoaki/hakmem

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Author	SHA1	Message	Date
Moe Charm (CI)	acc64f2438	Phase ML1: Pool v1 memset 89.73% overhead 軽量化 (+15.34% improvement) ## Summary - ChatGPT により bench_profile.h の setenv segfault を修正（RTLD_NEXT 経由に切り替え） - core/box/pool_zero_mode_box.h 新設：ENV キャッシュ経由で ZERO_MODE を統一管理 - core/hakmem_pool.c で zero mode に応じた memset 制御（FULL/header/off） - A/B テスト結果：ZERO_MODE=header で +15.34% improvement（1M iterations, C6-heavy） ## Files Modified - core/box/pool_api.inc.h: pool_zero_mode_box.h include - core/bench_profile.h: glibc setenv → malloc+putenv（segfault 回避） - core/hakmem_pool.c: zero mode 参照・制御ロジック - core/box/pool_zero_mode_box.h (新設): enum/getter - CURRENT_TASK.md: Phase ML1 結果記載 ## Test Results \| Iterations \| ZERO_MODE=full \| ZERO_MODE=header \| Improvement \| \|-----------\|----------------\|-----------------\|------------\| \| 10K \| 3.06 M ops/s \| 3.17 M ops/s \| +3.65% \| \| 1M \| 23.71 M ops/s \| 27.34 M ops/s \| +15.34% \| 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>	2025-12-10 09:08:18 +09:00
Moe Charm (CI)	7975e243ee	Phase 7 Task 3: Pre-warm TLS cache (+180-280% improvement!) MAJOR SUCCESS: HAKMEM now achieves 85-92% of System malloc on tiny allocations (128-512B) and BEATS System at 146% on 1024B allocations! Performance Results: - Random Mixed 128B: 21M → 59M ops/s (+181%) 🚀 - Random Mixed 256B: 19M → 70M ops/s (+268%) 🚀 - Random Mixed 512B: 21M → 68M ops/s (+224%) 🚀 - Random Mixed 1024B: 21M → 65M ops/s (+210%, 146% of System!) 🏆 - Larson 1T: 2.68M ops/s (stable, no regression) Implementation: 1. Task 3a: Remove profiling overhead in release builds - Wrapped RDTSC calls in #if !HAKMEM_BUILD_RELEASE - Compiler can eliminate profiling code completely - Effect: +2% (2.68M → 2.73M Larson) 2. Task 3b: Simplify refill logic - Use constants from hakmem_build_flags.h - TLS cache already optimal - Effect: No regression 3. Task 3c: Pre-warm TLS cache (GAME CHANGER!) - Pre-allocate 16 blocks per class at init - Eliminates cold-start penalty - Effect: +180-280% improvement 🚀 Root Cause: The bottleneck was cold-start, not the hot path! First allocation in each class triggered a SuperSlab refill (100+ cycles). Pre-warming eliminated this penalty, revealing Phase 7's true potential. Files Modified: - core/hakmem_tiny.c: Pre-warm function implementation - core/box/hak_core_init.inc.h: Pre-warm initialization call - core/tiny_alloc_fast.inc.h: Profiling overhead removal - core/hakmem_phase7_config.h: Task 3 constants (NEW) - core/hakmem_build_flags.h: Phase 7 feature flags - Makefile: PREWARM_TLS flag, phase7 targets - CLAUDE.md: Phase 7 success summary - PHASE7_TASK3_RESULTS.md: Comprehensive results report (NEW) Build: make HEADER_CLASSIDX=1 AGGRESSIVE_INLINE=1 PREWARM_TLS=1 phase7-bench 🎉 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>	2025-11-08 12:54:52 +09:00

Author

SHA1

Message

Date

Moe Charm (CI)

acc64f2438

Phase ML1: Pool v1 memset 89.73% overhead 軽量化 (+15.34% improvement)

## Summary
- ChatGPT により bench_profile.h の setenv segfault を修正（RTLD_NEXT 経由に切り替え）
- core/box/pool_zero_mode_box.h 新設：ENV キャッシュ経由で ZERO_MODE を統一管理
- core/hakmem_pool.c で zero mode に応じた memset 制御（FULL/header/off）
- A/B テスト結果：ZERO_MODE=header で +15.34% improvement（1M iterations, C6-heavy）

## Files Modified
- core/box/pool_api.inc.h: pool_zero_mode_box.h include
- core/bench_profile.h: glibc setenv → malloc+putenv（segfault 回避）
- core/hakmem_pool.c: zero mode 参照・制御ロジック
- core/box/pool_zero_mode_box.h (新設): enum/getter
- CURRENT_TASK.md: Phase ML1 結果記載

## Test Results
| Iterations | ZERO_MODE=full | ZERO_MODE=header | Improvement |
|-----------|----------------|-----------------|------------|
| 10K       | 3.06 M ops/s   | 3.17 M ops/s    | +3.65%     |
| 1M        | 23.71 M ops/s  | 27.34 M ops/s   | **+15.34%** |

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

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

2025-12-10 09:08:18 +09:00

Moe Charm (CI)

7975e243ee

Phase 7 Task 3: Pre-warm TLS cache (+180-280% improvement!)

MAJOR SUCCESS: HAKMEM now achieves 85-92% of System malloc on tiny
allocations (128-512B) and BEATS System at 146% on 1024B allocations!

Performance Results:
- Random Mixed 128B: 21M → 59M ops/s (+181%) 🚀
- Random Mixed 256B: 19M → 70M ops/s (+268%) 🚀
- Random Mixed 512B: 21M → 68M ops/s (+224%) 🚀
- Random Mixed 1024B: 21M → 65M ops/s (+210%, 146% of System!) 🏆
- Larson 1T: 2.68M ops/s (stable, no regression)

Implementation:
1. Task 3a: Remove profiling overhead in release builds
   - Wrapped RDTSC calls in #if !HAKMEM_BUILD_RELEASE
   - Compiler can eliminate profiling code completely
   - Effect: +2% (2.68M → 2.73M Larson)

2. Task 3b: Simplify refill logic
   - Use constants from hakmem_build_flags.h
   - TLS cache already optimal
   - Effect: No regression

3. Task 3c: Pre-warm TLS cache (GAME CHANGER!)
   - Pre-allocate 16 blocks per class at init
   - Eliminates cold-start penalty
   - Effect: +180-280% improvement 🚀

Root Cause:
The bottleneck was cold-start, not the hot path! First allocation in
each class triggered a SuperSlab refill (100+ cycles). Pre-warming
eliminated this penalty, revealing Phase 7's true potential.

Files Modified:
- core/hakmem_tiny.c: Pre-warm function implementation
- core/box/hak_core_init.inc.h: Pre-warm initialization call
- core/tiny_alloc_fast.inc.h: Profiling overhead removal
- core/hakmem_phase7_config.h: Task 3 constants (NEW)
- core/hakmem_build_flags.h: Phase 7 feature flags
- Makefile: PREWARM_TLS flag, phase7 targets
- CLAUDE.md: Phase 7 success summary
- PHASE7_TASK3_RESULTS.md: Comprehensive results report (NEW)

Build:
make HEADER_CLASSIDX=1 AGGRESSIVE_INLINE=1 PREWARM_TLS=1 phase7-bench

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

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

2025-11-08 12:54:52 +09:00

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