forked from shirou/gopsutil
/
process.go
210 lines (181 loc) · 4.25 KB
/
process.go
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package process
import (
"encoding/json"
"runtime"
"time"
"github.com/DataDog/gopsutil/cpu"
"github.com/DataDog/gopsutil/internal/common"
"github.com/DataDog/gopsutil/mem"
)
var invoke common.Invoker
func init() {
invoke = common.Invoke{}
}
type Process struct {
Pid int32 `json:"pid"`
NsPid int32 `json:"nspid"`
name string
status string
parent int32
numCtxSwitches *NumCtxSwitchesStat
uids []int32
gids []int32
numThreads int32
memInfo *MemoryInfoStat
lastCPUTimes *cpu.TimesStat
lastCPUTime time.Time
}
type FilledProcess struct {
Pid int32
Ppid int32
// process namespaced PID
NsPid int32
Cmdline []string
// stat
CpuTime cpu.TimesStat
Nice int32
CreateTime int64
OpenFdCount int32
// status
Name string
Status string
Uids []int32
Gids []int32
NumThreads int32
CtxSwitches *NumCtxSwitchesStat
// statm
MemInfo *MemoryInfoStat
MemInfoEx *MemoryInfoExStat
// cwd
Cwd string
// exe
Exe string
// IO
IOStat *IOCountersStat
// Username (windows only)
Username string
}
type OpenFilesStat struct {
Path string `json:"path"`
Fd uint64 `json:"fd"`
}
type MemoryInfoStat struct {
RSS uint64 `json:"rss"` // bytes
VMS uint64 `json:"vms"` // bytes
Swap uint64 `json:"swap"` // bytes
}
// MemoryInfoExStat is different between OSes
type MemoryInfoExStat struct {
RSS uint64 `json:"rss"` // bytes
VMS uint64 `json:"vms"` // bytes
Shared uint64 `json:"shared"` // bytes
Text uint64 `json:"text"` // bytes
Lib uint64 `json:"lib"` // bytes
Data uint64 `json:"data"` // bytes
Dirty uint64 `json:"dirty"` // bytes
}
type RlimitStat struct {
Resource int32 `json:"resource"`
Soft int32 `json:"soft"`
Hard int32 `json:"hard"`
}
type IOCountersStat struct {
ReadCount uint64 `json:"readCount"`
WriteCount uint64 `json:"writeCount"`
ReadBytes uint64 `json:"readBytes"`
WriteBytes uint64 `json:"writeBytes"`
}
type NumCtxSwitchesStat struct {
Voluntary int64 `json:"voluntary"`
Involuntary int64 `json:"involuntary"`
}
func (p Process) String() string {
s, _ := json.Marshal(p)
return string(s)
}
func (o OpenFilesStat) String() string {
s, _ := json.Marshal(o)
return string(s)
}
func (m MemoryInfoStat) String() string {
s, _ := json.Marshal(m)
return string(s)
}
func (r RlimitStat) String() string {
s, _ := json.Marshal(r)
return string(s)
}
func (i IOCountersStat) String() string {
s, _ := json.Marshal(i)
return string(s)
}
func (p NumCtxSwitchesStat) String() string {
s, _ := json.Marshal(p)
return string(s)
}
func PidExists(pid int32) (bool, error) {
pids, err := Pids()
if err != nil {
return false, err
}
for _, i := range pids {
if i == pid {
return true, err
}
}
return false, err
}
// If interval is 0, return difference from last call(non-blocking).
// If interval > 0, wait interval sec and return diffrence between start and end.
func (p *Process) Percent(interval time.Duration) (float64, error) {
cpuTimes, err := p.Times()
if err != nil {
return 0, err
}
now := time.Now()
if interval > 0 {
p.lastCPUTimes = cpuTimes
p.lastCPUTime = now
time.Sleep(interval)
cpuTimes, err = p.Times()
now = time.Now()
if err != nil {
return 0, err
}
} else {
if p.lastCPUTimes == nil {
// invoked first time
p.lastCPUTimes = cpuTimes
p.lastCPUTime = now
return 0, nil
}
}
numcpu := runtime.NumCPU()
delta := (now.Sub(p.lastCPUTime).Seconds()) * float64(numcpu)
ret := calculatePercent(p.lastCPUTimes, cpuTimes, delta, numcpu)
p.lastCPUTimes = cpuTimes
p.lastCPUTime = now
return ret, nil
}
func calculatePercent(t1, t2 *cpu.TimesStat, delta float64, numcpu int) float64 {
if delta == 0 {
return 0
}
delta_proc := t2.Total() - t1.Total()
overall_percent := ((delta_proc / delta) * 100) * float64(numcpu)
return overall_percent
}
// MemoryPercent returns how many percent of the total RAM this process uses
func (p *Process) MemoryPercent() (float32, error) {
machineMemory, err := mem.VirtualMemory()
if err != nil {
return 0, err
}
total := machineMemory.Total
processMemory, err := p.MemoryInfo()
if err != nil {
return 0, err
}
used := processMemory.RSS
return (100 * float32(used) / float32(total)), nil
}