Replace old cpu stats

pkg/stats/monitor.go

@@ -35,12 +35,10 @@ type Monitor struct {
 	cpuCostConfig config.CPUCostConfig
 
 	promCPULoad     prometheus.Gauge
-	promCPULoadV2   prometheus.Gauge
 	promProcCPULoad *prometheus.GaugeVec
 	requestGauge    *prometheus.GaugeVec
 
-	cpuStats  *utils.CPUStats
-	procStats *utils.CPUStats
+	cpuStats *utils.CPUStats
 
 	pendingCPUs atomic.Float64
 
@@ -63,15 +61,8 @@ func (m *Monitor) Start(
 	canAcceptRequest func() float64,
 	procUpdate func(map[int]float64) map[string]float64,
 ) error {
-	cpuStats, err := utils.NewCPUStats(func(idle float64) {
-		m.promCPULoad.Set(1 - idle/m.cpuStats.NumCPU())
-	})
-	if err != nil {
-		return err
-	}
-
 	procStats, err := utils.NewProcCPUStats(func(idle float64, usage map[int]float64) {
-		m.promCPULoadV2.Set(1 - idle/m.cpuStats.NumCPU())
+		m.promCPULoad.Set(1 - idle/m.cpuStats.NumCPU())
 		egressUsage := procUpdate(usage)
 		for egressID, cpuUsage := range egressUsage {
 			m.promProcCPULoad.With(prometheus.Labels{"egress_id": egressID}).Set(cpuUsage)
@@ -86,9 +77,7 @@ func (m *Monitor) Start(
 	if err != nil {
 		return err
 	}
-
-	m.cpuStats = cpuStats
-	m.procStats = procStats
+	m.cpuStats = procStats
 
 	if err = m.checkCPUConfig(); err != nil {
 		return err
@@ -115,13 +104,6 @@ func (m *Monitor) Start(
 		ConstLabels: prometheus.Labels{"node_id": conf.NodeID, "node_type": "EGRESS", "cluster_id": conf.ClusterID},
 	})
 
-	m.promCPULoadV2 = prometheus.NewGauge(prometheus.GaugeOpts{
-		Namespace:   "livekit",
-		Subsystem:   "node",
-		Name:        "cpu_load_v2",
-		ConstLabels: prometheus.Labels{"node_id": conf.NodeID, "cluster_id": conf.ClusterID},
-	})
-
 	m.promProcCPULoad = prometheus.NewGaugeVec(prometheus.GaugeOpts{
 		Namespace:   "livekit",
 		Subsystem:   "egress",
@@ -136,7 +118,7 @@ func (m *Monitor) Start(
 		ConstLabels: prometheus.Labels{"node_id": conf.NodeID, "cluster_id": conf.ClusterID},
 	}, []string{"type"})
 
-	prometheus.MustRegister(promNodeAvailable, promCanAcceptRequest, m.promCPULoad, m.promCPULoadV2, m.promProcCPULoad, m.requestGauge)
+	prometheus.MustRegister(promNodeAvailable, promCanAcceptRequest, m.promCPULoad, m.promProcCPULoad, m.requestGauge)
 
 	return nil
 }