使用 wmi 可行否？有尝试使用：

package main

import (
    "fmt"
    "github.com/StackExchange/wmi"
    "log"
    "time"
)

type Win32_Process struct {
    Name                 string
    TimeStamp_Sys100NS   uint64
    PercentProcessorTime uint64
}

func main() {
    var dst []Win32_Process

    var N1 uint64 = 0
    var D1 uint64 = 0

    for ; ; time.Sleep(time.Second) {
        str := "SELECT * FROM Win32_PerfFormattedData_PerfProc_Process WHERE Name = 'cpu-test'"
        err := wmi.Query(str, &dst)
        if err != nil {
            log.Fatal(err)
        }

        N2 := dst[0].PercentProcessorTime
        D2 := dst[0].TimeStamp_Sys100NS

        // D1/D2 一直是0
        fmt.Println(D1, D2, N1, N2)

        N1 = dst[0].PercentProcessorTime
        D1 = dst[0].TimeStamp_Sys100NS
    }
}

好像说这两个值可以计算CPU占用率？可是要怎么算呢？