49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
package procfs
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import (
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"fmt"
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"io/ioutil"
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)
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// ProcLoadavg contains process information obtained from /proc/loadavg
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// Its fields are documented using PROC(5) man page
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type ProcLoadavg struct {
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// The first three fields in this file are load average figures giving the
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// number of jobs in the run queue (state R) or waiting for disk I/O
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// (state D) averaged over 1, 5, and 15 minutes
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Avg1Min float32 // Average over 1 minute
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Avg5Min float32 // Average over 5 minutes
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Avg15Min float32 // Average over 15 minutes
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// Number of currently runnable kernel scheduling entities (processes,
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// threads)
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RunnableEntities uint
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// Number of kernel scheduling entities that currently exist on the system
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TotalEntities uint
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// PID of the process that was most recently created on the system
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LastPid uint
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}
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func NewProcLoadavg() ProcLoadavg {
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file := fmt.Sprintf("/proc/loadavg")
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bytes, err := ioutil.ReadFile(file)
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if err != nil {
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panic(err)
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}
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p := ProcLoadavg{}
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parsed, err := fmt.Sscanf(string(bytes), "%f %f %f %d/%d %d",
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&p.Avg1Min, &p.Avg5Min, &p.Avg15Min, &p.RunnableEntities,
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&p.TotalEntities, &p.LastPid)
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if parsed < 6 {
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fmt.Println("Managed to parse only", parsed, "fields out of 6")
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}
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if err != nil {
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panic(err)
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}
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return p
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}
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