},
		},
		{
			name:     "locality with region and zone",
			locality: "region/zone",
			want: &core.Locality{
				Region: "region",
				Zone:   "zone",
			},
		},
		{
			name:     "locality with region zone and subzone",
			locality: "region/zone/subzone",
			want: &core.Locality{
				Region:  "region",
				Zone:    "zone",
				SubZone: "subzone",
			},
		},
		{

topology domains of a given topology type. For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same labelSelector spread as 1/1/0: | zone1 | zone2 | zone3 | |   P   |   P   |       | - if MaxSkew is 1, incoming pod can only be scheduled to zone3 to become 1/1/1; scheduling it onto zone1(zone2) would make the ActualSkew(2-0) on zone1(zone2) violate MaxSkew(1). - if MaxSkew is 2, incoming pod can be scheduled onto any zone. It's a required field. Default value is 1 and 0 is not allowed.",...

				tf.RegisterPluginAsExtensions(podtopologyspread.Name, podTopologySpreadFunc, "PreFilter", "Filter"),
			},
			nodeNames: []string{"node-a/zone1", "node-b/zone1", "node-x/zone2"},
			testPods: []*v1.Pod{
				st.MakePod().Name("p").UID("p").Label("foo", "").Priority(highPriority).
					SpreadConstraint(1, "zone", v1.DoNotSchedule, st.MakeLabelSelector().Exists("foo").Obj(), nil, nil, nil, nil).

	// For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same
	// labelSelector spread as 3/1/1:
	// +-------+-------+-------+
	// | zone1 | zone2 | zone3 |
	// +-------+-------+-------+
	// | P P P |   P   |   P   |
	// +-------+-------+-------+
	// If WhenUnsatisfiable is set to DoNotSchedule, incoming pod can only be scheduled

  // scheduling it onto zone1(zone2) would make the ActualSkew(3-1) on zone1(zone2)
  // violate MaxSkew(1).
  // - if MaxSkew is 2, incoming pod can be scheduled onto any zone.
  // When `whenUnsatisfiable=ScheduleAnyway`, it is used to give higher precedence
  // to topologies that satisfy it.
  // It's a required field. Default value is 1 and 0 is not allowed.

  // scheduling it onto zone1(zone2) would make the ActualSkew(3-1) on zone1(zone2)
  // violate MaxSkew(1).
  // - if MaxSkew is 2, incoming pod can be scheduled onto any zone.
  // When `whenUnsatisfiable=ScheduleAnyway`, it is used to give higher precedence
  // to topologies that satisfy it.
  // It's a required field. Default value is 1 and 0 is not allowed.

			"ns/svc1": {zoneB: 5, zoneC: 4},
		},
		expectedQueueLen: 1,
	}, {
		name: "even zones but node missing cpu, sync required",
		nodes: []nodeInfo{
			{zoneLabel: &zoneB, ready: &readyTrue, cpu: &cpu2000},
			{zoneLabel: &zoneB, ready: &readyTrue},
			{zoneLabel: &zoneC, ready: &readyTrue, cpu: &cpu2000},
			{zoneLabel: &zoneC, ready: &readyTrue, cpu: &cpu2000},
		},

	// For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same
	// labelSelector spread as 3/1/1:
	// +-------+-------+-------+
	// | zone1 | zone2 | zone3 |
	// +-------+-------+-------+
	// | P P P |   P   |   P   |
	// +-------+-------+-------+
	// If WhenUnsatisfiable is set to DoNotSchedule, incoming pod can only be scheduled

zero if the number of eligible domains is less than MinDomains. For example, in a 3-zone cluster, MaxSkew is set to 1, and pods with the same labelSelector spread as 2/2/1: In this case, the global minimum is 1. | zone1 | zone2 | zone3 | |  P P  |  P P  |   P   | - if MaxSkew is 1, incoming pod can only be scheduled to zone3 to become 2/2/2; scheduling it onto zone1(zone2) would make the ActualSkew(3-1) on zone1(zone2) violate MaxSkew(1). - if MaxSkew is 2, incoming pod can be scheduled onto any zone....

	// First the zone information.
	//	utcoff[4] isdst[1] nameindex[1]
	nzone := n[NZone]
	if nzone == 0 {
		// Reject tzdata files with no zones. There's nothing useful in them.
		// This also avoids a panic later when we add and then use a fake transition (golang.org/issue/29437).
		return nil, errBadData
	}
	zones := make([]zone, nzone)
	for i := range zones {
		var ok bool
		var n uint32