109 lines
2.5 KiB
Go
109 lines
2.5 KiB
Go
package widgets
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import (
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"fmt"
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"log"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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psMem "github.com/shirou/gopsutil/mem"
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ui "github.com/xxxserxxx/gotop/termui"
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"github.com/xxxserxxx/gotop/utils"
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)
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type MemWidget struct {
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*ui.LineGraph
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updateInterval time.Duration
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mainMetric prometheus.Gauge
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swapMetric prometheus.Gauge
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}
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type MemoryInfo struct {
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Total uint64
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Used uint64
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UsedPercent float64
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}
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func (self *MemWidget) renderMemInfo(line string, memoryInfo MemoryInfo) {
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self.Data[line] = append(self.Data[line], memoryInfo.UsedPercent)
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memoryTotalBytes, memoryTotalMagnitude := utils.ConvertBytes(memoryInfo.Total)
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memoryUsedBytes, memoryUsedMagnitude := utils.ConvertBytes(memoryInfo.Used)
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self.Labels[line] = fmt.Sprintf("%3.0f%% %5.1f%s/%.0f%s",
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memoryInfo.UsedPercent,
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memoryUsedBytes,
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memoryUsedMagnitude,
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memoryTotalBytes,
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memoryTotalMagnitude,
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)
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}
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func (self *MemWidget) updateMainMemory() {
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mainMemory, err := psMem.VirtualMemory()
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if err != nil {
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log.Printf("failed to get main memory info from gopsutil: %v", err)
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} else {
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self.renderMemInfo("Main", MemoryInfo{
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Total: mainMemory.Total,
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Used: mainMemory.Used,
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UsedPercent: mainMemory.UsedPercent,
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})
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if self.mainMetric != nil {
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self.mainMetric.Set(mainMemory.UsedPercent)
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}
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}
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}
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func NewMemWidget(updateInterval time.Duration, horizontalScale int) *MemWidget {
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self := &MemWidget{
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LineGraph: ui.NewLineGraph(),
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updateInterval: updateInterval,
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}
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self.Title = " Memory Usage "
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self.HorizontalScale = horizontalScale
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self.Data["Main"] = []float64{0}
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self.Data["Swap"] = []float64{0}
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self.updateMainMemory()
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self.updateSwapMemory()
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go func() {
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for range time.NewTicker(self.updateInterval).C {
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self.Lock()
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self.updateMainMemory()
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self.updateSwapMemory()
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self.Unlock()
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}
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}()
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return self
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}
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func (b *MemWidget) EnableMetric() {
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b.mainMetric = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "gotop",
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Subsystem: "memory",
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Name: "main",
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})
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mainMemory, err := psMem.VirtualMemory()
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if err == nil {
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b.mainMetric.Set(mainMemory.UsedPercent)
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}
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prometheus.MustRegister(b.mainMetric)
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b.swapMetric = prometheus.NewGauge(prometheus.GaugeOpts{
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Namespace: "gotop",
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Subsystem: "memory",
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Name: "swap",
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})
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swapMemory, err := psMem.SwapMemory()
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if err == nil {
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b.swapMetric.Set(swapMemory.UsedPercent)
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}
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prometheus.MustRegister(b.swapMetric)
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}
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func (b *MemWidget) Scale(i int) {
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b.LineGraph.HorizontalScale = i
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}
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