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test: 同机SHM对比 + FastDDS/CycloneDDS 5轮统计复测数据 (2026-08-16)

letsgooo requested to merge dev-multi-dds-rounds into main
  • 阶段A: 同机SHM vs UDP回环, SHM延迟全面低20-23% (shm_clean_/udp_loopback_)
  • 阶段B: 跨机双DDS交错各5轮, 中位数口径抑制WSL2宿主机噪声 (fastdds_r{1..5}*/cyclonedds_r{1..5}*)
  • CycloneDDS: /cmd_vel抖动5.44ms, /scan 5/5轮零丢包, RSS低12%
  • FastDDS: /imu丢包2.06%更稳
  • docs/advanced_tasks.md 多DDS对比表填入实测数据, 标记完成
  • docs/development_log.md 新增2026-08-16条目

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