xboard
83 lines
1.9 KiB
Go
83 lines
1.9 KiB
Go
package monitor
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import (
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"log/slog"
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"runtime"
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"time"
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"github.com/shirou/gopsutil/v4/cpu"
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"github.com/shirou/gopsutil/v4/disk"
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"github.com/shirou/gopsutil/v4/mem"
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)
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var startTime = time.Now()
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func init() {
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// Warm up the CPU sampler. The first cpu.Percent call with interval=0
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// always returns 0% because it has no prior sample. This throwaway call
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// seeds the baseline so subsequent Collect() calls return real values.
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cpu.Percent(500*time.Millisecond, false)
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}
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// Status holds system resource metrics
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type Status struct {
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Uptime uint64
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CPU float64
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CPUPerCore []float64
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MemTotal uint64
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MemUsed uint64
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SwapTotal uint64
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SwapUsed uint64
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DiskTotal uint64
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DiskUsed uint64
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// GC metrics (process-wide)
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NumGC uint32
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LastPauseMS float64
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}
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// Collect gathers current system metrics
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func Collect() Status {
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var s Status
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s.Uptime = uint64(time.Since(startTime).Seconds())
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if cpuPercent, err := cpu.Percent(0, false); err == nil && len(cpuPercent) > 0 {
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s.CPU = cpuPercent[0]
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} else if err != nil {
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slog.Debug("failed to get CPU usage", "error", err)
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}
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// Per-core CPU usage (best-effort; safe if it fails).
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if perCore, err := cpu.Percent(0, true); err == nil && len(perCore) > 0 {
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s.CPUPerCore = perCore
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}
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if vmStat, err := mem.VirtualMemory(); err == nil {
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s.MemTotal = vmStat.Total
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s.MemUsed = vmStat.Used
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}
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if swapStat, err := mem.SwapMemory(); err == nil {
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s.SwapTotal = swapStat.Total
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s.SwapUsed = swapStat.Used
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}
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if diskStat, err := disk.Usage("/"); err == nil {
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s.DiskTotal = diskStat.Total
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s.DiskUsed = diskStat.Used
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}
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// GC metrics
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var ms runtime.MemStats
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runtime.ReadMemStats(&ms)
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s.NumGC = ms.NumGC
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if ms.NumGC > 0 {
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// PauseNs is a ring buffer of the most recent GC pause times.
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idx := (ms.NumGC - 1) % uint32(len(ms.PauseNs))
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s.LastPauseMS = float64(ms.PauseNs[idx]) / 1e6
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}
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return s
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}
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