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avatar commented on May 19, 2024

这个跟udp协议本身有关，调用udp的send，不会出现返回值为EAGAIN的情况，当udp的send被过于频繁的调用，底层协议不能够把所有数据都发送出去时，数据包会被直接丢弃。因此使用udp协议，需要自己做流控

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happyxgang avatar happyxgang commented on May 19, 2024

tcp返回eagain的时候包可能只发送了部分，如果不在传输层做保存发送会让业务侧出现混乱。

而udp是整包一次性发送成功或失败，且本身协议不保证可靠传输。因此当整个包发送失败的情况下，直接交由业务来做流控更合理一些。

不知道这么理解合不合适。

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avatar commented on May 19, 2024

嗯嗯，是这个过程

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happyxgang avatar happyxgang commented on May 19, 2024

多谢大大耐心回复

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