mirror of
https://github.com/TwiN/gatus.git
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171 lines
4.4 KiB
Go
171 lines
4.4 KiB
Go
// Copyright 2018 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package procfs
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import (
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"bytes"
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"strconv"
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"strings"
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"github.com/prometheus/procfs/internal/util"
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)
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// ProcStatus provides status information about the process,
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// read from /proc/[pid]/stat.
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type ProcStatus struct {
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// The process ID.
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PID int
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// The process name.
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Name string
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// Thread group ID.
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TGID int
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// Peak virtual memory size.
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VmPeak uint64 // nolint:golint
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// Virtual memory size.
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VmSize uint64 // nolint:golint
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// Locked memory size.
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VmLck uint64 // nolint:golint
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// Pinned memory size.
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VmPin uint64 // nolint:golint
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// Peak resident set size.
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VmHWM uint64 // nolint:golint
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// Resident set size (sum of RssAnnon RssFile and RssShmem).
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VmRSS uint64 // nolint:golint
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// Size of resident anonymous memory.
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RssAnon uint64 // nolint:golint
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// Size of resident file mappings.
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RssFile uint64 // nolint:golint
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// Size of resident shared memory.
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RssShmem uint64 // nolint:golint
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// Size of data segments.
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VmData uint64 // nolint:golint
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// Size of stack segments.
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VmStk uint64 // nolint:golint
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// Size of text segments.
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VmExe uint64 // nolint:golint
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// Shared library code size.
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VmLib uint64 // nolint:golint
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// Page table entries size.
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VmPTE uint64 // nolint:golint
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// Size of second-level page tables.
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VmPMD uint64 // nolint:golint
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// Swapped-out virtual memory size by anonymous private.
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VmSwap uint64 // nolint:golint
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// Size of hugetlb memory portions
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HugetlbPages uint64
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// Number of voluntary context switches.
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VoluntaryCtxtSwitches uint64
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// Number of involuntary context switches.
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NonVoluntaryCtxtSwitches uint64
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// UIDs of the process (Real, effective, saved set, and filesystem UIDs)
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UIDs [4]string
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// GIDs of the process (Real, effective, saved set, and filesystem GIDs)
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GIDs [4]string
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}
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// NewStatus returns the current status information of the process.
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func (p Proc) NewStatus() (ProcStatus, error) {
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data, err := util.ReadFileNoStat(p.path("status"))
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if err != nil {
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return ProcStatus{}, err
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}
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s := ProcStatus{PID: p.PID}
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lines := strings.Split(string(data), "\n")
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for _, line := range lines {
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if !bytes.Contains([]byte(line), []byte(":")) {
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continue
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}
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kv := strings.SplitN(line, ":", 2)
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// removes spaces
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k := string(strings.TrimSpace(kv[0]))
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v := string(strings.TrimSpace(kv[1]))
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// removes "kB"
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v = string(bytes.Trim([]byte(v), " kB"))
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// value to int when possible
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// we can skip error check here, 'cause vKBytes is not used when value is a string
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vKBytes, _ := strconv.ParseUint(v, 10, 64)
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// convert kB to B
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vBytes := vKBytes * 1024
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s.fillStatus(k, v, vKBytes, vBytes)
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}
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return s, nil
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}
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func (s *ProcStatus) fillStatus(k string, vString string, vUint uint64, vUintBytes uint64) {
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switch k {
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case "Tgid":
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s.TGID = int(vUint)
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case "Name":
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s.Name = vString
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case "Uid":
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copy(s.UIDs[:], strings.Split(vString, "\t"))
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case "Gid":
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copy(s.GIDs[:], strings.Split(vString, "\t"))
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case "VmPeak":
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s.VmPeak = vUintBytes
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case "VmSize":
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s.VmSize = vUintBytes
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case "VmLck":
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s.VmLck = vUintBytes
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case "VmPin":
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s.VmPin = vUintBytes
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case "VmHWM":
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s.VmHWM = vUintBytes
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case "VmRSS":
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s.VmRSS = vUintBytes
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case "RssAnon":
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s.RssAnon = vUintBytes
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case "RssFile":
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s.RssFile = vUintBytes
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case "RssShmem":
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s.RssShmem = vUintBytes
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case "VmData":
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s.VmData = vUintBytes
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case "VmStk":
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s.VmStk = vUintBytes
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case "VmExe":
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s.VmExe = vUintBytes
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case "VmLib":
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s.VmLib = vUintBytes
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case "VmPTE":
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s.VmPTE = vUintBytes
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case "VmPMD":
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s.VmPMD = vUintBytes
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case "VmSwap":
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s.VmSwap = vUintBytes
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case "HugetlbPages":
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s.HugetlbPages = vUintBytes
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case "voluntary_ctxt_switches":
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s.VoluntaryCtxtSwitches = vUint
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case "nonvoluntary_ctxt_switches":
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s.NonVoluntaryCtxtSwitches = vUint
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}
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}
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// TotalCtxtSwitches returns the total context switch.
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func (s ProcStatus) TotalCtxtSwitches() uint64 {
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return s.VoluntaryCtxtSwitches + s.NonVoluntaryCtxtSwitches
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}
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