jt/millics
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Getting CPU usage

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This commit is contained in:
Lauren Toivanen 2025-05-18 15:06:22 +03:00
parent 8206630289
commit 1265ca31c5
2 changed files with 49 additions and 7 deletions
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14
index.html
View file

@ -10,9 +10,15 @@
<body>
<h1>Millics</h1>
<p>
This is kindof running maybe probs and has kindof no
functionality yet.
</p>
<table>
<tr>
<td>CPU</td>
<td>{{.CpuUsage}} %</td>
</tr>
<tr>
<td>sysLoad</td>
<td>{{.SysLoad}}</td>
</tr>
</table>
</body>
</html>

42
main.go
View file

@ -19,10 +19,14 @@ type Config struct {
type page struct {
Title string
SysLoad string
CpuUsage string
}
var db *sql.DB
var cpuUsage int8
var sysLoad float32
func main() {
var err error
@ -58,7 +62,9 @@ func main() {
case <-done:
return
case t := <-tickerLAvgMin.C:
fmt.Printf("%v\n", t)
fetchLoadMinutely(t)
fetchCpuMinutely(t)
}
}
}()
@ -79,6 +85,8 @@ func httpRootHandler(w http.ResponseWriter, r *http.Request) {
t, _ := template.ParseFiles("index.html")
var p page
p.Title = "Millics"
p.SysLoad = fmt.Sprint(sysLoad)
p.CpuUsage = fmt.Sprint(cpuUsage)
t.Execute(w, p)
}
@ -87,7 +95,7 @@ func initDB() {
return
}
func fetchLoadMinutely(t time.Time) {
func fetchLoadMinutely(_t time.Time) {
file, err := os.Open("/proc/loadavg")
if err != nil {
fmt.Printf("Error fetching load: %v\n", err)
@ -101,7 +109,35 @@ func fetchLoadMinutely(t time.Time) {
fmt.Printf("Can't parse /proc/loadavg: %v\n", err)
return
}
fmt.Printf("sysLoad %v: %v/%v/%v\n", t, lavg1, lavg5, lavg15)
sysLoad = lavg1
fmt.Printf("sysLoad: %v/%v/%v\n", lavg1, lavg5, lavg15)
return
}
var lastCpuTotal, lastCpuTotalIdle uint64 = 0, 0
func fetchCpuMinutely(_t time.Time) {
file, err := os.Open("/proc/stat")
if err != nil {
fmt.Printf("Error fetching CPU usage: %v\n", err)
return
}
defer file.Close()
var cpuUser, cpuNice, cpuSystem, cpuIdle, cpuIOWait, cpuIRQ, cpuSoftIRQ, cpuSteal uint64
var cpu string
ret, err := fmt.Fscanf(file, "%s %d %d %d %d %d %d %d %d", &cpu, &cpuUser, &cpuNice, &cpuSystem, &cpuIdle, &cpuIOWait, &cpuIRQ, &cpuSoftIRQ, &cpuSteal)
if err != nil || cpu != "cpu" || ret < 9 {
fmt.Printf("Can't parse /proc/stat: %v\n", err)
return
}
cpuTotal := cpuUser + cpuNice + cpuSystem + cpuIdle + cpuIOWait + cpuIRQ + cpuSoftIRQ + cpuSteal
cpuTotalIdle := cpuIdle + cpuIOWait
if lastCpuTotal != 0 && lastCpuTotalIdle != 0 {
cpuUsage = int8(100-float32((cpuTotalIdle-lastCpuTotalIdle))/float32((cpuTotal-lastCpuTotal))*100)
fmt.Printf("CPU: %v %%\n", cpuUsage)
}
lastCpuTotal = cpuTotal
lastCpuTotalIdle = cpuTotalIdle
}