Golang
Go routines
Very light-weight user-level threads
- 100KiB go routines vs. 2MiB OS thread
- stack starts small and grows as needed
- Context Switch is a function call rather than a system call
- Go routines run on top of kernel threads
- One Kernel Thread per processor core
- Every logical core is owned by a Kernel Thread when running
- Convert blocking system calls
- convert to non-blocking by yielding the core
- poll using kernel event API
poll,epoll,kqueueto check whether an event has happened
Go channels
Example
func worker(done chan bool) {
// Notify the main routine
done <- true
}
func main() {
// Create a channel to notify us
done := make(chan bool, 1)
// Create go routine
go worker(done)
// Block until we receive a message
next() // <- start executing here when worker is done done
}