posix message queue

4세대 벤치에서는 mq가 udp sock보다 빠르다고

https://the-linux-channel.the-toffee-project.org/index.php?page=8-tutorials-research-socket-overhead-in-linux-vs-message-queues-and-benchmarking

https://reakwon.tistory.com/m/209