- apiserver_flowcontrol_current_r: R(the time of the last change in state of the queues)
  - apiserver_flowcontrol_dispatch_r: R(the time of the latest request dispatch)
  - apiserver_flowcontrol_latest_s: S(the request last dispatched) = R(when that request starts executing in the virtual world)
  - apiserver_flowcontrol_next_s_bounds: min and max next S among non-empty queues

pkg syscall (freebsd-386-cgo), func Kevent(int, []Kevent_t, []Kevent_t, *Timespec) (int, error)
pkg syscall (freebsd-386-cgo), func Kill(int, Signal) error
pkg syscall (freebsd-386-cgo), func Kqueue() (int, error)
pkg syscall (freebsd-386-cgo), func Listen(int, int) error
pkg syscall (freebsd-386-cgo), func Lstat(string, *Stat_t) error
pkg syscall (freebsd-386-cgo), func Mkfifo(string, uint32) error

<a href="#Length_and_capacity"><code>cap</code></a> and
<a href="#Length_and_capacity"><code>len</code></a>
by any number of goroutines without further synchronization.
Channels act as first-in-first-out queues.
For example, if one goroutine sends values on a channel
and a second goroutine receives them, the values are
received in the order sent.
</p>

pkg syscall (freebsd-arm64), func Kevent(int, []Kevent_t, []Kevent_t, *Timespec) (int, error)
pkg syscall (freebsd-arm64), func Kill(int, Signal) error
pkg syscall (freebsd-arm64), func Kqueue() (int, error)
pkg syscall (freebsd-arm64), func Listen(int, int) error
pkg syscall (freebsd-arm64), func Lstat(string, *Stat_t) error
pkg syscall (freebsd-arm64), func Mkfifo(string, uint32) error

pkg syscall (darwin-arm64), func Kevent(int, []Kevent_t, []Kevent_t, *Timespec) (int, error)
pkg syscall (darwin-arm64), func Kill(int, Signal) error
pkg syscall (darwin-arm64), func Kqueue() (int, error)
pkg syscall (darwin-arm64), func Listen(int, int) error
pkg syscall (darwin-arm64), func Lstat(string, *Stat_t) error
pkg syscall (darwin-arm64), func Mkfifo(string, uint32) error

pkg syscall (netbsd-arm64-cgo), func Kevent(int, []Kevent_t, []Kevent_t, *Timespec) (int, error)
pkg syscall (netbsd-arm64-cgo), func Kill(int, Signal) error
pkg syscall (netbsd-arm64-cgo), func Kqueue() (int, error)
pkg syscall (netbsd-arm64-cgo), func Listen(int, int) error
pkg syscall (netbsd-arm64-cgo), func Lstat(string, *Stat_t) error
pkg syscall (netbsd-arm64-cgo), func Mkfifo(string, uint32) error

- Kube-proxy exposes a new metric, `kubeproxy_sync_proxy_rules_last_queued_timestamp_seconds`, that indicates the last time a change for kube-proxy was queued to be applied. ([#90175](https://github.com/kubernetes/kubernetes/pull/90175), [@squeed](https://github.com/squeed)) [SIG Instrumentation and Network]

pkg syscall (darwin-386), func Issetugid() bool
pkg syscall (darwin-386), func Kevent(int, []Kevent_t, []Kevent_t, *Timespec) (int, error)
pkg syscall (darwin-386), func Kill(int, Signal) error
pkg syscall (darwin-386), func Kqueue() (int, error)
pkg syscall (darwin-386), func Listen(int, int) error
pkg syscall (darwin-386), func Lstat(string, *Stat_t) error
pkg syscall (darwin-386), func Mkfifo(string, uint32) error

pkg syscall (freebsd-riscv64), func Kevent(int, []Kevent_t, []Kevent_t, *Timespec) (int, error) #53466
pkg syscall (freebsd-riscv64), func Kill(int, Signal) error #53466
pkg syscall (freebsd-riscv64), func Kqueue() (int, error) #53466
pkg syscall (freebsd-riscv64), func Listen(int, int) error #53466
pkg syscall (freebsd-riscv64), func Lstat(string, *Stat_t) error #53466