fanyang 79035ea972 perf(hotpath): add cpu_hotspot_ring bench and send-chain optimization plan ...

- Add measure_all to PeerMap and CidrSet impl blocks (hotpath::measure_all)
- Add [profile.hotpath] for samply-compatible builds (strip=false, debug=line-tables-only)
- Add cpu_hotspot_ring example: 2-node ring tunnel with data-plane flooding (~234K pps)
- Add plans/006-send-chain-cpu-optimization.md based on hotpath+samply 423M sample analysis
  Key findings: dashmap redundancy (14.9%), metrics overhead (8.3%), mpsc (14.1%)
  Target: reduce send_msg_internal from 3.26us to ~2us per packet

2026-06-28 12:45:05 +08:00

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006-send-chain-cpu-optimization.md

perf(hotpath): add cpu_hotspot_ring bench and send-chain optimization plan

2026-06-28 12:45:05 +08:00