tomoaki/hakmem
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Phase 6-2: Promote Front FastLane Free DeDup (default ON)

Browse Source 
Results:
- A/B test: +5.18% on Mixed (10-run, clean env)
- Baseline: 46.68M ops/s
- Optimized: 49.10M ops/s
- Improvement: +2.42M ops/s (+5.18%)

Strategy:
- Eliminate duplicate header validation in front_fastlane_try_free()
- Direct call to free_tiny_fast() when dedup enabled
- Single validation path (no redundant checks)

Success factors:
1. Complete duplicate elimination (free path optimization)
2. Free path importance (50% of Mixed workload)
3. Improved execution stability (CV: 1.00% → 0.58%)

Phase 6 cumulative:
- Phase 6-1 FastLane: +11.13%
- Phase 6-2 Free DeDup: +5.18%
- Total: ~+16-17% from baseline (multiplicative effect)

Promotion:
- Default: HAKMEM_FRONT_FASTLANE_FREE_DEDUP=1 (opt-out)
- Added to MIXED_TINYV3_C7_SAFE preset
- Added to C6_HEAVY_LEGACY_POOLV1 preset
- Rollback: HAKMEM_FRONT_FASTLANE_FREE_DEDUP=0

Files modified:
- core/box/front_fastlane_env_box.h: default 0 → 1
- core/bench_profile.h: added to presets
- CURRENT_TASK.md: Phase 6-2 GO result

Health check: PASSED (all profiles)

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
Moe Charm (CI)
2025-12-14 17:38:21 +09:00
parent c0d2f47f7d
commit dcc1d42e7f
5 changed files with 281 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
core/bench_profile.h
View File

@ -75,8 +75,10 @@ static inline void bench_apply_profile(void) {
bench_setenv_default("HAKMEM_MALLOC_WRAPPER_ENV_SNAPSHOT", "1");
// Phase 5 E5-1: Free Tiny Direct Path (+3.35% proven on Mixed, 10-run)
bench_setenv_default("HAKMEM_FREE_TINY_DIRECT", "1");
// Phase 6: Front FastLane (Layer Collapse) (+11.13% proven on Mixed, 10-run)
// Phase 6-1: Front FastLane (Layer Collapse) (+11.13% proven on Mixed, 10-run)
bench_setenv_default("HAKMEM_FRONT_FASTLANE", "1");
// Phase 6-2: Front FastLane Free DeDup (+5.18% proven on Mixed, 10-run)
bench_setenv_default("HAKMEM_FRONT_FASTLANE_FREE_DEDUP", "1");
// Phase 4-4: C6 ULTRA free+alloc 統合を有効化 (default OFF, manual opt-in)
bench_setenv_default("HAKMEM_TINY_C6_ULTRA_FREE_ENABLED", "0");
// Phase MID-V3: Mid/Pool HotBox v3
@ -104,8 +106,10 @@ static inline void bench_apply_profile(void) {
// Phase MID-V3: Mid/Pool HotBox v3 (257-768B, C6 only)
bench_setenv_default("HAKMEM_MID_V3_ENABLED", "1");
bench_setenv_default("HAKMEM_MID_V3_CLASSES", "0x40");
// Phase 6: Front FastLane (Layer Collapse) (+11.13% proven on Mixed, 10-run)
// Phase 6-1: Front FastLane (Layer Collapse) (+11.13% proven on Mixed, 10-run)
bench_setenv_default("HAKMEM_FRONT_FASTLANE", "1");
// Phase 6-2: Front FastLane Free DeDup (+5.18% proven on Mixed, 10-run)
bench_setenv_default("HAKMEM_FRONT_FASTLANE_FREE_DEDUP", "1");
// Phase 2 B3: Routing branch shape optimization (LIKELY on LEGACY, cold helper for rare routes)
bench_setenv_default("HAKMEM_TINY_ALLOC_ROUTE_SHAPE", "1");
} else if (strcmp(p, "C6_V7_STUB") == 0) {