On Sat, Jun 3, 2023 at 12:35 AM fliter <imc...@gmail.com> wrote: > > > In sync/mutex.go, there is a comment like the following: > > ```go > // Mutex fairness. > // > // Mutex can be in 2 modes of operations: normal and starvation. > // In normal mode waiters are queued in FIFO order, but a woken up waiter > // does not own the mutex and competes with new arriving goroutines over > // the ownership. New arriving goroutines have an advantage -- they are > // already running on CPU and there can be lots of them, so a woken up > // waiter has good chances of losing. In such case it is queued at front > // of the wait queue. If a waiter fails to acquire the mutex for more than > 1ms, > // it switches mutex to the starvation mode. > ``` > > > I wonder if the waiter here refers to the goroutine at the head of the queue, > or any goroutine in the queue?
In that comment "waiter" refers to the goroutine at the head of the queue. When a mutex is unlocked, it wakes up the first waiter, if any. Ian -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAOyqgcXosL%3D_R5raCpAi9y8bfDkdTabeTKyiK2bV_EaqpsjkNA%40mail.gmail.com.
