143 lines
2.9 KiB
Go
143 lines
2.9 KiB
Go
package process
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import (
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"encoding/json"
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"runtime"
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"time"
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cpu "github.com/influxdb/tivan/plugins/system/ps/cpu"
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)
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type Process struct {
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Pid int32 `json:"pid"`
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name string
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status string
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numCtxSwitches *NumCtxSwitchesStat
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uids []int32
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gids []int32
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numThreads int32
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memInfo *MemoryInfoStat
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lastCPUTimes *cpu.CPUTimesStat
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lastCPUTime time.Time
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}
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type OpenFilesStat struct {
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Path string `json:"path"`
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Fd uint64 `json:"fd"`
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}
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type MemoryInfoStat struct {
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RSS uint64 `json:"rss"` // bytes
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VMS uint64 `json:"vms"` // bytes
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Swap uint64 `json:"swap"` // bytes
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}
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type RlimitStat struct {
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Resource int32 `json:"resource"`
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Soft int32 `json:"soft"`
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Hard int32 `json:"hard"`
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}
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type IOCountersStat struct {
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ReadCount uint64 `json:"read_count"`
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WriteCount uint64 `json:"write_count"`
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ReadBytes uint64 `json:"read_bytes"`
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WriteBytes uint64 `json:"write_bytes"`
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}
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type NumCtxSwitchesStat struct {
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Voluntary int64 `json:"voluntary"`
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Involuntary int64 `json:"involuntary"`
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}
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func (p Process) String() string {
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s, _ := json.Marshal(p)
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return string(s)
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}
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func (o OpenFilesStat) String() string {
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s, _ := json.Marshal(o)
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return string(s)
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}
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func (m MemoryInfoStat) String() string {
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s, _ := json.Marshal(m)
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return string(s)
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}
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func (r RlimitStat) String() string {
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s, _ := json.Marshal(r)
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return string(s)
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}
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func (i IOCountersStat) String() string {
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s, _ := json.Marshal(i)
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return string(s)
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}
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func (p NumCtxSwitchesStat) String() string {
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s, _ := json.Marshal(p)
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return string(s)
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}
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func PidExists(pid int32) (bool, error) {
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pids, err := Pids()
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if err != nil {
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return false, err
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}
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for _, i := range pids {
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if i == pid {
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return true, err
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}
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}
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return false, err
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}
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// If interval is 0, return difference from last call(non-blocking).
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// If interval > 0, wait interval sec and return diffrence between start and end.
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func (p *Process) CPUPercent(interval time.Duration) (float64, error) {
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numcpu := runtime.NumCPU()
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calculate := func(t1, t2 *cpu.CPUTimesStat, delta float64) float64 {
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if delta == 0 {
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return 0
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}
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delta_proc := (t2.User - t1.User) + (t2.System - t1.System)
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overall_percent := ((delta_proc / delta) * 100) * float64(numcpu)
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return overall_percent
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}
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cpuTimes, err := p.CPUTimes()
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if err != nil {
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return 0, err
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}
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if interval > 0 {
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p.lastCPUTimes = cpuTimes
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p.lastCPUTime = time.Now()
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time.Sleep(interval)
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cpuTimes, err = p.CPUTimes()
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if err != nil {
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return 0, err
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}
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} else {
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if p.lastCPUTimes == nil {
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// invoked first time
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p.lastCPUTimes, err = p.CPUTimes()
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if err != nil {
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return 0, err
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}
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p.lastCPUTime = time.Now()
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return 0, nil
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}
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}
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delta := (time.Now().Sub(p.lastCPUTime).Seconds()) * float64(numcpu)
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ret := calculate(p.lastCPUTimes, cpuTimes, float64(delta))
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p.lastCPUTimes = cpuTimes
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p.lastCPUTime = time.Now()
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return ret, nil
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}
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