Esempio n. 1
0
func DiskIOCounters() (map[string]DiskIOCountersStat, error) {
	filename := "/proc/diskstats"
	lines, err := common.ReadLines(filename)
	if err != nil {
		return nil, err
	}
	ret := make(map[string]DiskIOCountersStat, 0)
	empty := DiskIOCountersStat{}

	for _, line := range lines {
		fields := strings.Fields(line)
		name := fields[2]
		reads, err := strconv.ParseUint((fields[3]), 10, 64)
		if err != nil {
			return ret, err
		}
		rbytes, err := strconv.ParseUint((fields[5]), 10, 64)
		if err != nil {
			return ret, err
		}
		rtime, err := strconv.ParseUint((fields[6]), 10, 64)
		if err != nil {
			return ret, err
		}
		writes, err := strconv.ParseUint((fields[7]), 10, 64)
		if err != nil {
			return ret, err
		}
		wbytes, err := strconv.ParseUint((fields[9]), 10, 64)
		if err != nil {
			return ret, err
		}
		wtime, err := strconv.ParseUint((fields[10]), 10, 64)
		if err != nil {
			return ret, err
		}
		iotime, err := strconv.ParseUint((fields[12]), 10, 64)
		if err != nil {
			return ret, err
		}
		d := DiskIOCountersStat{
			ReadBytes:  rbytes * SectorSize,
			WriteBytes: wbytes * SectorSize,
			ReadCount:  reads,
			WriteCount: writes,
			ReadTime:   rtime,
			WriteTime:  wtime,
			IoTime:     iotime,
		}
		if d == empty {
			continue
		}
		d.Name = name

		d.SerialNumber = GetDiskSerialNumber(name)
		ret[name] = d
	}
	return ret, nil
}
Esempio n. 2
0
func VirtualMemory() (*VirtualMemoryStat, error) {
	filename := "/proc/meminfo"
	lines, _ := common.ReadLines(filename)
	// flag if MemAvailable is in /proc/meminfo (kernel 3.14+)
	memavail := false

	ret := &VirtualMemoryStat{}
	for _, line := range lines {
		fields := strings.Split(line, ":")
		if len(fields) != 2 {
			continue
		}
		key := strings.TrimSpace(fields[0])
		value := strings.TrimSpace(fields[1])
		value = strings.Replace(value, " kB", "", -1)

		t, err := strconv.ParseUint(value, 10, 64)
		if err != nil {
			return ret, err
		}
		switch key {
		case "MemTotal":
			ret.Total = t * 1024
		case "MemFree":
			ret.Free = t * 1024
		case "MemAvailable":
			memavail = true
			ret.Available = t * 1024
		case "Buffers":
			ret.Buffers = t * 1024
		case "Cached":
			ret.Cached = t * 1024
		case "Active":
			ret.Active = t * 1024
		case "Inactive":
			ret.Inactive = t * 1024
		}
	}
	if !memavail {
		ret.Available = ret.Free + ret.Buffers + ret.Cached
	}
	ret.Used = ret.Total - ret.Free
	ret.UsedPercent = float64(ret.Total-ret.Available) / float64(ret.Total) * 100.0

	return ret, nil
}
Esempio n. 3
0
func SwapMemory() (*SwapMemoryStat, error) {
	sysinfo := &syscall.Sysinfo_t{}

	if err := syscall.Sysinfo(sysinfo); err != nil {
		return nil, err
	}
	ret := &SwapMemoryStat{
		Total: uint64(sysinfo.Totalswap),
		Free:  uint64(sysinfo.Freeswap),
	}
	ret.Used = ret.Total - ret.Free
	//check Infinity
	if ret.Total != 0 {
		ret.UsedPercent = float64(ret.Total-ret.Free) / float64(ret.Total) * 100.0
	} else {
		ret.UsedPercent = 0
	}
	lines, _ := common.ReadLines("/proc/vmstat")
	for _, l := range lines {
		fields := strings.Fields(l)
		if len(fields) < 2 {
			continue
		}
		switch fields[0] {
		case "pswpin":
			value, err := strconv.ParseUint(fields[1], 10, 64)
			if err != nil {
				continue
			}
			ret.Sin = value * 4 * 1024
		case "pswpout":
			value, err := strconv.ParseUint(fields[1], 10, 64)
			if err != nil {
				continue
			}
			ret.Sout = value * 4 * 1024
		}
	}
	return ret, nil
}
Esempio n. 4
0
// Get disk partitions.
// should use setmntent(3) but this implement use /etc/mtab file
func DiskPartitions(all bool) ([]DiskPartitionStat, error) {

	filename := "/etc/mtab"
	lines, err := common.ReadLines(filename)
	if err != nil {
		return nil, err
	}

	ret := make([]DiskPartitionStat, 0, len(lines))

	for _, line := range lines {
		fields := strings.Fields(line)
		d := DiskPartitionStat{
			Device:     fields[0],
			Mountpoint: fields[1],
			Fstype:     fields[2],
			Opts:       fields[3],
		}
		ret = append(ret, d)
	}

	return ret, nil
}