Files
hakmem/core
Moe Charm (CI) 9cd266c816 refactor: Guard SuperSlab expansion debug logs + Update CURRENT_TASK
## Changes

### 1. Debug Log Cleanup (Release Build Optimization)
**Files Modified:**
- `core/tiny_superslab_alloc.inc.h:183-234`
- `core/hakmem_tiny_superslab.c:567-618`

**Problem:**
- SuperSlab expansion logs flooded output (268+ lines per benchmark run)
- Massive I/O overhead masked true performance in benchmarks
- Production builds should not spam stderr

**Solution:**
- Guard all expansion logs with `#if !defined(NDEBUG) || defined(HAKMEM_SUPERSLAB_VERBOSE)`
- Debug builds: Logs enabled by default
- Release builds: Logs disabled (clean output)
- Can re-enable with `-DHAKMEM_SUPERSLAB_VERBOSE` for debugging

**Guarded Messages:**
- "SuperSlab chunk exhausted for class X, expanding..."
- "Successfully expanded SuperSlabHead for class X"
- "CRITICAL: Failed to expand SuperSlabHead..." (OOM)
- "Expanded SuperSlabHead for class X: N chunks now"

**Impact:**
- Release builds: Clean benchmark output (no log spam)
- Debug builds: Full visibility into expansion behavior
- Performance: No I/O overhead in production benchmarks

### 2. CURRENT_TASK.md Update
**New Focus:** ACE Investigation for Mid-Large Performance Recovery

**Context:**
-  100% stability achieved (commit 616070cf7)
-  Tiny Hot Path: **First time beating BOTH System and mimalloc** (+48.5% vs System)
- 🔴 Critical issue: Mid-Large MT collapsed (-88% vs System)
- Root cause: ACE disabled → all allocations go to mmap (slow)

**Next Task:**
Task Agent to investigate ACE mechanism (Ultrathink mode):
1. Why is ACE disabled?
2. How does ACE improve Mid-Large performance?
3. Can we re-enable ACE to recover +171% advantage?
4. Implementation plan and risk assessment

**Benchmark Results:**
Comprehensive results saved to: `benchmarks/results/comprehensive_20251108_214317/`

---

## Testing

Verified clean build output:
```bash
make clean && make HEADER_CLASSIDX=1 AGGRESSIVE_INLINE=1 PREWARM_TLS=1 larson_hakmem
./larson_hakmem 1 1 128 1024 1 12345 1
# No expansion log spam in release build
```

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

Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-08 22:02:09 +09:00
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