What are the behaviors of a goroutine when it calls synchronous system functions?

When a goroutine calls a synchronous system function (for example, reading from a file or a network call implemented at the OS level), it blocks until the operation completes. The Go runtime attempts to minimize the impact of blocking by allocating a separate system thread to execute such a goroutine, so as not to block other goroutines.

Features:

• The goroutine that called the synchronous system function is blocked.
• The runtime may create an additional thread so that other goroutines can continue executing.
• This allows efficient use of multithreading and prevents blocking the entire scheduler.

Thus, synchronous system calls do not stop all goroutines, but the specific goroutine waits for the operation to complete.