// GoSwitch and GoSwitchDestroy represent a trio of events:
	// - Unblock of the goroutine to switch to.
	// - Block or destroy of the current goroutine.
	// - Start executing the next goroutine.
	//
	// Because it acts like a GoStart for the next goroutine, we can
	// only advance it if the sequence numbers line up.
	//
	// The current goroutine on the thread must be actively running.

	// headroom when the GC actually starts. For larger heaps, set the max trigger
	// point at the goal, minus the minimum heap size.
	//
	// This choice follows from the fact that the minimum heap size is chosen
	// to reflect the costs of a GC with no work to do. With a large heap but
	// very little scan work to perform, this gives us exactly as much runway
	// as we would need, in the worst case.

	// that contains line breaks, then the validation failure message will also be produced as if the messageExpression field were unset, and
	// the fact that messageExpression produced an empty string/string with only spaces/string with line breaks will be logged.

	if !proxier.isInitialized() {
		proxier.logger.V(2).Info("Not syncing ipvs rules until Services and Endpoints have been received from master")
		return
	}

	// its safe to set initialSync to false as it acts as a flag for startup actions
	// and the mutex is held.
	defer func() {
		proxier.initialSync = false
	}()

	// Keep track of how long syncs take.
	start := time.Now()
	defer func() {

	// 3. Trigger cycle N+1 by starting sweep termination N+1.
	//
	// 4. Wait for mark termination N+1 to complete.
	//
	// 5. Help with sweep N+1 until it's done.
	//
	// This all has to be written to deal with the fact that the
	// GC may move ahead on its own. For example, when we block
	// until mark termination N, we may wake up in cycle N+2.

	// Wait until the current sweep termination, mark, and mark
	// termination complete.

    // way for it to return a false negative would be for the target value to jump around in the map
    // such that none of the subsequent iterations observed it, despite the fact that at every point
    // in time it was present somewhere int the map. This becomes increasingly unlikely as
    // CONTAINS_VALUE_RETRIES increases, though without locking it is theoretically possible.

If `x` and `y` are vectors or higher rank, then `condition` must be either a
scalar, a vector with size matching the first dimension of `x`, or must have
the same shape as `x`.

The `condition` tensor acts as a mask that chooses, based on the value at each
element, whether the corresponding element / row in the output should be
taken from `x` (if true) or `y` (if false).

			// Path segments starting with ~ on Unix are almost always
			// users who have incorrectly quoted ~ while setting GOPATH,
			// preventing it from expanding to $HOME.
			// The situation is made more confusing by the fact that
			// bash allows quoted ~ in $PATH (most shells do not).
			// Do not get confused by this, and do not try to use the path.
			// It does not exist, and printing errors about it confuses

	// that contains line breaks, then the validation failure message will also be produced as if the messageExpression field were unset, and
	// the fact that messageExpression produced an empty string/string with only spaces/string with line breaks will be logged.

#ifdef GOOS_windows
	// Make sure we have enough room for 4 stack-backed fast-call
	// registers as per Windows amd64 calling convention.
	ADJSP	$32
	// On Windows, asmcgocall_landingpad acts as landing pad for exceptions
	// thrown in the cgo call. Exceptions that reach this function will be
	// handled by runtime.sehtramp thanks to the SEH metadata added
	// by the compiler.