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|
package widgets
import (
"fmt"
"log"
"sync"
"time"
"github.com/prometheus/client_golang/prometheus"
"github.com/xxxserxxx/gotop/v3/devices"
ui "github.com/xxxserxxx/gotop/v3/termui"
)
type CpuWidget struct {
*ui.LineGraph
CpuCount int
ShowAverageLoad bool
ShowPerCpuLoad bool
updateInterval time.Duration
updateLock sync.Mutex
metric map[string]prometheus.Gauge
}
var cpuLabels []string
func NewCpuWidget(updateInterval time.Duration, horizontalScale int, showAverageLoad bool, showPerCpuLoad bool) *CpuWidget {
self := &CpuWidget{
LineGraph: ui.NewLineGraph(),
CpuCount: len(cpuLabels),
updateInterval: updateInterval,
ShowAverageLoad: showAverageLoad,
ShowPerCpuLoad: showPerCpuLoad,
}
self.Title = " CPU Usage "
self.HorizontalScale = horizontalScale
if !(self.ShowAverageLoad || self.ShowPerCpuLoad) {
if self.CpuCount <= 8 {
self.ShowPerCpuLoad = true
} else {
self.ShowAverageLoad = true
}
}
if self.ShowAverageLoad {
self.Data["AVRG"] = []float64{0}
}
if self.ShowPerCpuLoad {
cpus := make(map[string]int)
devices.UpdateCPU(cpus, self.updateInterval, self.ShowPerCpuLoad)
for k, v := range cpus {
self.Data[k] = []float64{float64(v)}
}
}
self.update()
go func() {
for range time.NewTicker(self.updateInterval).C {
self.update()
}
}()
return self
}
func (self *CpuWidget) EnableMetric() {
if self.ShowAverageLoad {
self.metric = make(map[string]prometheus.Gauge)
self.metric["AVRG"] = prometheus.NewGauge(prometheus.GaugeOpts{
Subsystem: "cpu",
Name: "avg",
})
} else {
cpus := make(map[string]int)
devices.UpdateCPU(cpus, self.updateInterval, self.ShowPerCpuLoad)
self.metric = make(map[string]prometheus.Gauge)
for key, perc := range cpus {
gauge := prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: "gotop",
Subsystem: "cpu",
Name: key,
})
gauge.Set(float64(perc))
prometheus.MustRegister(gauge)
self.metric[key] = gauge
}
}
}
func (b *CpuWidget) Scale(i int) {
b.LineGraph.HorizontalScale = i
}
func (self *CpuWidget) update() {
if self.ShowAverageLoad {
go func() {
cpus := make(map[string]int)
devices.UpdateCPU(cpus, self.updateInterval, false)
self.Lock()
defer self.Unlock()
self.updateLock.Lock()
defer self.updateLock.Unlock()
var val float64
for _, v := range cpus {
val = float64(v)
break
}
self.Data["AVRG"] = append(self.Data["AVRG"], val)
self.Labels["AVRG"] = fmt.Sprintf("%3.0f%%", val)
if self.metric != nil {
self.metric["AVRG"].Set(val)
}
}()
}
if self.ShowPerCpuLoad {
go func() {
cpus := make(map[string]int)
devices.UpdateCPU(cpus, self.updateInterval, true)
self.Lock()
defer self.Unlock()
self.updateLock.Lock()
defer self.updateLock.Unlock()
for key, percent := range cpus {
self.Data[key] = append(self.Data[key], float64(percent))
self.Labels[key] = fmt.Sprintf("%d%%", percent)
if self.metric != nil {
if self.metric[key] == nil {
log.Printf("no metrics for %s", key)
} else {
self.metric[key].Set(float64(percent))
}
}
}
}()
}
}
|
