I/O Multiplexing syscalls

The system calls epoll/poll/select implement I/O multiplexing, which enables the simultaneous monitoring of multiple input and output sources in a single operation. These system calls are based on the Linux design principle, which considers everything as a file and operates by monitoring files to determine if they are ready for the requested operation. The main advantage of multiplexing I/O operations is that it avoids blocking read and write where a process will wait for data while on the CPU. Instead, one waits for the multiplexing I/O system calls to determine which files are ready for read or write.