# Next Steps Plan (2025-10-22)

## Scope (P1.1)

- Tiny remote-free MPSC + adaptive magazine (DONE baseline; extend drains)
- false sharing mitigation (L2.5 padded locks, stats aligned) (DONE)
- L2 page bundle prefetch (DONE)
- L2/L2.5 mmap-backed bundles (DONE)

## Recommended Next Work

1) Tiny improvements
- Drain MPSC from full-slabs opportunistically during alloc slow path
- Promote slabs from full→free immediately after remote drain
- Make magazine CAP adaptive per site (simple top-K sites)

2) L2/L2.5 bundle policy
- L2: multi-bundle refill when hit/miss ratio degrades in window
- L2.5: demand-zero (MADV_DONTNEED) policy for 512KB/1MB on cold sites

3) Site-bucket policy table (ACE)
- Site×sizeバケットの1バイト方策テーブル（読み出し無ロック、更新は窓時）

## Env toggles

- Site Rules: `HAKMEM_SITE_RULES=1`
- EVO sampling: `HAKMEM_EVO_SAMPLE=N`

## Notes

- Keep hot path reads lock-free; learning/updates only on window close
- Prefer per-shard/per-site state to avoid global contention