PA在封装报文时，实际报文之间相差100ms，但是封装过后，报文相差不足1ms

[KevinDu2023]

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Environment

Note：Include the following detailes, among others:

• CP version 0.7.4、0.8.0
• Operation System(OS) Centos 7.9
• platform（e.g., vm, pod, etc）* 微探针

Issue description

测试环境复现了这个结果，经过vxlan封装后的req和resp的时间相差就会变得很短，实际报文之间相差100ms，封装后相差1ms.

[robbietu]

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