How can i get the memory used by each process in linux system

Getting Help
1

From proc folder how to read the each processes and its used ram memory ,

2

How is this related to Go?

3

func (p *Unixprocess) fillFromStatus() error {
return p.fillFromStatusWithContext(context.Background())
}

func (p *Unixprocess) fillFromStatusWithContext(ctx context.Context) error {
pid := p.pid
statPath := memory.HostProc(strconv.Itoa(int(pid)), “status”)
contents, err := ioutil.ReadFile(statPath)
if err != nil {
return err
}
lines := strings.Split(string(contents), “\n”)

//p.memInfo = &MemoryInfoStat{}
 p.meminfo= &MemInfoStat{}
for _, line := range lines {
	tabParts := strings.SplitN(line, "\t", 2)
	if len(tabParts) < 2 {
		continue
	}
	value := tabParts[1]
	switch strings.TrimRight(tabParts[0], ":") {

	case "PPid", "Ppid":
		pval, err := strconv.ParseInt(value, 10, 32)
		if err != nil {
			return err
		}
		p.ppid = int(pval)

	case "VmRSS":
		value := strings.Trim(value, " kB") // remove last "kB"
		v, err := strconv.ParseUint(value, 10, 64)
		if err != nil {
			return err
		}
		p.meminfo.RSS=v* 1024
		//p.memInfo.RSS = v * 1024
	case "VmSize":
		value := strings.Trim(value, " kB") // remove last "kB"
		v, err := strconv.ParseUint(value, 10, 64)
		if err != nil {
			return err
		}
		p.meminfo.VMS = v * 1024
	case "VmSwap":
		value := strings.Trim(value, " kB") // remove last "kB"
		v, err := strconv.ParseUint(value, 10, 64)
		if err != nil {
			return err
		}
		p.meminfo.Swap = v * 1024
	}
	}

return nil

}

4

I am unable to get the required output from main function

5

Which library provides Unixprocess?

1 Like
6

It is the struct name Unixprocess.

type Unixprocess struct {
pid int
name string
ppid int
binary string
state rune
status string
pgrp int
sid int
meminfo *MemInfoStat
}

7

i want to read the each running processes of linux system and its cpu usage and memory usage using go language

8

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