34 lines
1.0 KiB
Markdown
34 lines
1.0 KiB
Markdown
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# Next Steps Plan (2025-10-22)
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## Scope (P1.1)
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- Tiny remote-free MPSC + adaptive magazine (DONE baseline; extend drains)
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- false sharing mitigation (L2.5 padded locks, stats aligned) (DONE)
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- L2 page bundle prefetch (DONE)
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- L2/L2.5 mmap-backed bundles (DONE)
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## Recommended Next Work
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1) Tiny improvements
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- Drain MPSC from full-slabs opportunistically during alloc slow path
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- Promote slabs from full→free immediately after remote drain
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- Make magazine CAP adaptive per site (simple top-K sites)
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2) L2/L2.5 bundle policy
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- L2: multi-bundle refill when hit/miss ratio degrades in window
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- L2.5: demand-zero (MADV_DONTNEED) policy for 512KB/1MB on cold sites
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3) Site-bucket policy table (ACE)
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- 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）
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## Env toggles
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- Site Rules: `HAKMEM_SITE_RULES=1`
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- EVO sampling: `HAKMEM_EVO_SAMPLE=N`
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## Notes
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- Keep hot path reads lock-free; learning/updates only on window close
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- Prefer per-shard/per-site state to avoid global contention
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