How to measure linux bridge overhead (cpu usage)

I’m running httpd server inside docker containers (centos) using bridged network. I want to measure the actual cpu usage of docker bridge. I tried perf tool, it gives usage per kernel symbol. But I couldn’t separate out which symbol belongs to docker bridge. How can I measure CPU usage of bridge when I’m server request from http server. It could be any application running with bridged network not specifically docker containers. Thanks.

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