128 lines
2.9 KiB
Go
128 lines
2.9 KiB
Go
// +build linux
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package mem
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import (
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"context"
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"strconv"
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"strings"
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"github.com/shirou/gopsutil/internal/common"
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"golang.org/x/sys/unix"
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)
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func VirtualMemory() (*VirtualMemoryStat, error) {
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return VirtualMemoryWithContext(context.Background())
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}
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func VirtualMemoryWithContext(ctx context.Context) (*VirtualMemoryStat, error) {
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filename := common.HostProc("meminfo")
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lines, _ := common.ReadLines(filename)
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// flag if MemAvailable is in /proc/meminfo (kernel 3.14+)
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memavail := false
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ret := &VirtualMemoryStat{}
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for _, line := range lines {
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fields := strings.Split(line, ":")
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if len(fields) != 2 {
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continue
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}
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key := strings.TrimSpace(fields[0])
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value := strings.TrimSpace(fields[1])
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value = strings.Replace(value, " kB", "", -1)
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t, err := strconv.ParseUint(value, 10, 64)
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if err != nil {
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return ret, err
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}
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switch key {
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case "MemTotal":
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ret.Total = t * 1024
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case "MemFree":
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ret.Free = t * 1024
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case "MemAvailable":
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memavail = true
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ret.Available = t * 1024
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case "Buffers":
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ret.Buffers = t * 1024
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case "Cached":
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ret.Cached = t * 1024
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case "Active":
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ret.Active = t * 1024
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case "Inactive":
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ret.Inactive = t * 1024
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case "Writeback":
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ret.Writeback = t * 1024
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case "WritebackTmp":
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ret.WritebackTmp = t * 1024
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case "Dirty":
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ret.Dirty = t * 1024
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case "Shmem":
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ret.Shared = t * 1024
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case "Slab":
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ret.Slab = t * 1024
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case "PageTables":
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ret.PageTables = t * 1024
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case "SwapCached":
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ret.SwapCached = t * 1024
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case "CommitLimit":
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ret.CommitLimit = t * 1024
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case "Committed_AS":
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ret.CommittedAS = t * 1024
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}
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}
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if !memavail {
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ret.Available = ret.Free + ret.Buffers + ret.Cached
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}
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ret.Used = ret.Total - ret.Free - ret.Buffers - ret.Cached
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ret.UsedPercent = float64(ret.Used) / float64(ret.Total) * 100.0
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return ret, nil
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}
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func SwapMemory() (*SwapMemoryStat, error) {
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return SwapMemoryWithContext(context.Background())
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}
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func SwapMemoryWithContext(ctx context.Context) (*SwapMemoryStat, error) {
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sysinfo := &unix.Sysinfo_t{}
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if err := unix.Sysinfo(sysinfo); err != nil {
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return nil, err
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}
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ret := &SwapMemoryStat{
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Total: uint64(sysinfo.Totalswap) * uint64(sysinfo.Unit),
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Free: uint64(sysinfo.Freeswap) * uint64(sysinfo.Unit),
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}
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ret.Used = ret.Total - ret.Free
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//check Infinity
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if ret.Total != 0 {
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ret.UsedPercent = float64(ret.Total-ret.Free) / float64(ret.Total) * 100.0
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} else {
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ret.UsedPercent = 0
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}
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filename := common.HostProc("vmstat")
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lines, _ := common.ReadLines(filename)
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for _, l := range lines {
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fields := strings.Fields(l)
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if len(fields) < 2 {
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continue
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}
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switch fields[0] {
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case "pswpin":
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value, err := strconv.ParseUint(fields[1], 10, 64)
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if err != nil {
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continue
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}
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ret.Sin = value * 4 * 1024
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case "pswpout":
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value, err := strconv.ParseUint(fields[1], 10, 64)
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if err != nil {
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continue
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}
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ret.Sout = value * 4 * 1024
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}
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}
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return ret, nil
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}
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