/usr/share/gocode/src/github.com/shirou/gopsutil/mem/mem_linux.go is in golang-github-shirou-gopsutil-dev 2.17.08-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | // +build linux
package mem
import (
"strconv"
"strings"
"github.com/shirou/gopsutil/internal/common"
"golang.org/x/sys/unix"
)
func VirtualMemory() (*VirtualMemoryStat, error) {
filename := common.HostProc("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
case "Writeback":
ret.Writeback = t * 1024
case "WritebackTmp":
ret.WritebackTmp = t * 1024
case "Dirty":
ret.Dirty = t * 1024
case "Shmem":
ret.Shared = t * 1024
case "Slab":
ret.Slab = t * 1024
case "PageTables":
ret.PageTables = t * 1024
case "SwapCached":
ret.SwapCached = t * 1024
}
}
if !memavail {
ret.Available = ret.Free + ret.Buffers + ret.Cached
}
ret.Used = ret.Total - ret.Available
ret.UsedPercent = float64(ret.Total-ret.Available) / float64(ret.Total) * 100.0
return ret, nil
}
func SwapMemory() (*SwapMemoryStat, error) {
sysinfo := &unix.Sysinfo_t{}
if err := unix.Sysinfo(sysinfo); err != nil {
return nil, err
}
ret := &SwapMemoryStat{
Total: uint64(sysinfo.Totalswap) * uint64(sysinfo.Unit),
Free: uint64(sysinfo.Freeswap) * uint64(sysinfo.Unit),
}
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
}
filename := common.HostProc("vmstat")
lines, _ := common.ReadLines(filename)
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
}
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