CODEWITHSUNDEEP
macosgosysinfo
Simon Que
Simon Que

Reputation: 45

How to get total RAM from Golang code on Mac?

I have some Linux code in golang:

import "syscall"

var info syscall.Sysinfo_t
err := syscall.Sysinfo(&info)
totalRam := info.Totalram

I'd like to port this to Mac OS X. I see that Sysinfo is available on Linux but not on Mac:

Linux:

$ go list -f '{{.GoFiles}}' syscall | sed -e "s/[][]//g" | xargs fgrep --color -Iwn Sysinfo
syscall_linux.go:962://sysnb    Sysinfo(info *Sysinfo_t) (err error)
zsyscall_linux_amd64.go:822:func Sysinfo(info *Sysinfo_t) (err error) {\

Mac:

$ go list -f '{{.GoFiles}}' syscall | sed -e "s/[][]//g" | xargs fgrep --color -Iwn Sysinfo
# No results

What is the correct way to get the system RAM info on Mac?

Upvotes: 1

Views: 2047

Answers (1)

shmsr
shmsr

Reputation: 4204

This code is cross-compile supported.

Pre-requisites:

Get this package github.com/shirou/gopsutil/mem

package main

import (
    "fmt"
    "log"
    "os"
    "runtime"
    "strconv"

    "github.com/shirou/gopsutil/mem"
)

func errHandler(err error) {
    if err != nil {
        log.Println(err.Error())
        os.Exit(1)
    }
}

func main() {
    runtimeOS := runtime.GOOS
    runtimeARCH := runtime.GOARCH
    fmt.Println("OS: ", runtimeOS)
    fmt.Println("Architecture: ", runtimeARCH)
    vmStat, err := mem.VirtualMemory()
    errHandler(err)
    fmt.Println("Total memory: ", strconv.FormatUint(vmStat.Total/(1024*1024), 10)+" MB")
    fmt.Println("Free memory: ", strconv.FormatUint(vmStat.Free/(1024*1024), 10)+" MB")

    // Cached and swap memory are ignored. Should be considered to get the understanding of the used %
    fmt.Println("Percentage used memory: ", strconv.FormatFloat(vmStat.UsedPercent, 'f', 2, 64)+"%")
}

Upvotes: 5

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