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How to use Pid method of execution Package

Best Gauge code snippet using execution.Pid

tracer.go

Source:tracer.go

...14// Execution represents a complete command execution that started and finished15// while the tracer was active.16//17type Execution struct {18	Pid, Ppid uint3219	ExitCode  int20	Time      uint6421	Argv      []string22	Start, Finish uint6423}24// payload is the data communicated between the kernel and userspace through a25// perf map.26//27type payload struct {28	Type int3229	Comm      [16]byte30	ExitCode  int3231	Pid, Ppid uint3232	Ts        uint6433}34type EventType int3235const (36	EventStart EventType = iota + 137	EventFinish38)39type Tracer struct {40	procs map[uint32]Execution41	mod   *bcc.Module42}43func New() (t Tracer) {44	return Tracer{45		mod:   bcc.NewModule(src, []string{}),46		procs: make(map[uint32]Execution, 0),47	}48}49func (t *Tracer) Close() {50	t.mod.Close()51}52func (t *Tracer) Run(ctx context.Context) (err error) {53	err = attachProbes(t.mod)54	if err != nil {55		err = fmt.Errorf("attaching probes: %w", err)56		return57	}58	err = t.loop(ctx)59	if err != nil {60		err = fmt.Errorf("event loop: %w", err)61		return62	}63	return64}65func (t *Tracer) loop(ctx context.Context) (err error) {66	var (67		evs    = bcc.NewTable(t.mod.TableId("events"), t.mod)68		evsC   = make(chan []byte, 100)69		execsC = make(chan Execution, 1)70	)71	perfMap, err := bcc.InitPerfMap(evs, evsC)72	if err != nil {73		err = fmt.Errorf("perf map: %w", err)74		return75	}76	defer perfMap.Stop()77	go func() {78		for data := range evsC {79			dispatch(data, t.start, t.finish, execsC)80		}81	}()82	perfMap.Start()83	fmt.Printf("%-16s %-16s %-16s %-16s %-16s \n",84		"PID", "PPID", "CODE", "TIME(s)", "ARGV")85	for {86		select {87		case <-ctx.Done():88			err = ctx.Err()89			return90		case execution := <-execsC:91			fmt.Printf("%-16d %-16d %-16d %-16d %-16s \n",92				execution.Pid,93				execution.Ppid,94				execution.ExitCode,95				0,96				strings.Join(execution.Argv, " "))97		}98	}99	return100}101func procArgv(pid uint32) (argv []string, err error) {102	f, err := os.Open("/proc/" + strconv.Itoa(int(pid)) + "/cmdline")103	if err != nil {104		return105	}106	defer f.Close()107	s, err := ioutil.ReadAll(f)108	if err != nil {109		return110	}111	for _, b := range bytes.Split(s, []byte{'\x00'}) {112		argv = append(argv, string(b))113	}114	return115}116func (t *Tracer) start(p payload) (err error) {117	execution := Execution{118		Pid:   p.Pid,119		Ppid:  p.Ppid,120		Start: p.Ts,121	}122	execution.Argv, err = procArgv(p.Pid)123	if err != nil {124		return125	}126	t.procs[p.Pid] = execution127	return128}129func (t *Tracer) finish(p payload) (execution *Execution, err error) {130	e, found := t.procs[p.Pid]131	if !found {132		return133	}134	delete(t.procs, p.Pid)135	execution = &e136	return137}138func dispatch(data []byte,139	start func(payload) error,140	finish func(payload) (*Execution, error),141	results chan<- Execution,142) (err error) {143	var (144		p         payload145		execution *Execution146	)147	err = binary.Read(bytes.NewBuffer(data), bcc.GetHostByteOrder(), &p)148	if err != nil {...

roundRobin_test.go

Source:roundRobin_test.go

...11		{ID: 2, ArrivalTime: 4, Duration: 6},12		{ID: 3, ArrivalTime: 4, Duration: 8},13	}14	processesExecution := []p.ProcessExecution{15		{Pid: 0, StartTime: 0, FinishTime: 2},16		{Pid: 1, StartTime: 2, FinishTime: 4},17		{Pid: 0, StartTime: 4, FinishTime: 6},18		{Pid: 2, StartTime: 6, FinishTime: 8},19		{Pid: 3, StartTime: 8, FinishTime: 10},20		{Pid: 1, StartTime: 10, FinishTime: 12},21		{Pid: 0, StartTime: 12, FinishTime: 14},22		{Pid: 2, StartTime: 14, FinishTime: 16},23		{Pid: 3, StartTime: 16, FinishTime: 18},24		{Pid: 1, StartTime: 18, FinishTime: 20},25		{Pid: 0, StartTime: 20, FinishTime: 22},26		{Pid: 2, StartTime: 22, FinishTime: 24},27		{Pid: 3, StartTime: 24, FinishTime: 26},28		{Pid: 1, StartTime: 26, FinishTime: 28},29		{Pid: 0, StartTime: 28, FinishTime: 30},30		{Pid: 3, StartTime: 30, FinishTime: 32},31		{Pid: 1, StartTime: 32, FinishTime: 34},32		{Pid: 0, StartTime: 34, FinishTime: 36},33		{Pid: 0, StartTime: 36, FinishTime: 38},34		{Pid: 0, StartTime: 38, FinishTime: 40},35		{Pid: 0, StartTime: 40, FinishTime: 42},36		{Pid: 0, StartTime: 42, FinishTime: 44},37	}38	got := RoundRobin(processes)39	want := processesExecution40	if !reflect.DeepEqual(got, want) {41		t.Errorf("got %v, wanted %v", got, want)42	}43}44func TestRoundRobinDurationNotMod2(t *testing.T) {45	processes := []p.Process{46		{ID: 1, ArrivalTime: 0, Duration: 6},47		{ID: 2, ArrivalTime: 0, Duration: 3},48		{ID: 3, ArrivalTime: 0, Duration: 1},49		{ID: 4, ArrivalTime: 0, Duration: 7},50	}51	processesExecution := []p.ProcessExecution{52		{Pid: 1, StartTime: 0, FinishTime: 2},53		{Pid: 2, StartTime: 2, FinishTime: 4},54		{Pid: 3, StartTime: 4, FinishTime: 5},55		{Pid: 4, StartTime: 5, FinishTime: 7},56		{Pid: 1, StartTime: 7, FinishTime: 9},57		{Pid: 2, StartTime: 9, FinishTime: 10},58		{Pid: 4, StartTime: 10, FinishTime: 12},59		{Pid: 1, StartTime: 12, FinishTime: 14},60		{Pid: 4, StartTime: 14, FinishTime: 16},61		{Pid: 4, StartTime: 16, FinishTime: 17},62	}63	got := RoundRobin(processes)64	want := processesExecution65	if !reflect.DeepEqual(got, want) {66		t.Errorf("\ngot    %v \nwanted %v", got, want)67	}68}69func TestRoundRobinWithIdleTime(t *testing.T) {70	processes := []p.Process{71		{ID: 1, ArrivalTime: 0, Duration: 1},72		{ID: 2, ArrivalTime: 2, Duration: 2},73		{ID: 3, ArrivalTime: 2, Duration: 1},74	}75	processesExecution := []p.ProcessExecution{76		{Pid: 1, StartTime: 0, FinishTime: 1},77		{Pid: 2, StartTime: 2, FinishTime: 4},78		{Pid: 3, StartTime: 4, FinishTime: 5},79	}80	got := RoundRobin(processes)81	want := processesExecution82	if !reflect.DeepEqual(got, want) {83		t.Errorf("\ngot    %v \nwanted %v", got, want)84	}85}86func TestRoundRobinFinal(t *testing.T) {87	processes := []p.Process{88		{ID: 1, ArrivalTime: 0, Duration: 7},89		{ID: 2, ArrivalTime: 2, Duration: 4},90		{ID: 3, ArrivalTime: 4, Duration: 1},91		{ID: 4, ArrivalTime: 5, Duration: 4},92	}93	processesExecution := []p.ProcessExecution{94		{Pid: 1, StartTime: 0, FinishTime: 2},95		{Pid: 2, StartTime: 2, FinishTime: 4},96		{Pid: 1, StartTime: 4, FinishTime: 6},97		{Pid: 3, StartTime: 6, FinishTime: 7},98		{Pid: 2, StartTime: 7, FinishTime: 9},99		{Pid: 4, StartTime: 9, FinishTime: 11},100		{Pid: 1, StartTime: 11, FinishTime: 13},101		{Pid: 4, StartTime: 13, FinishTime: 15},102		{Pid: 1, StartTime: 15, FinishTime: 16},103	}104	got := RoundRobin(processes)105	want := processesExecution106	if !reflect.DeepEqual(got, want) {107		t.Errorf("\ngot    %v \nwanted %v", got, want)108	}109}...

averageTime_test.go

Source:averageTime_test.go

...8		{ID: 0, ArrivalTime: 0, Duration: 20}, {ID: 1, ArrivalTime: 0, Duration: 10},9		{ID: 2, ArrivalTime: 4, Duration: 6}, {ID: 3, ArrivalTime: 4, Duration: 8},10	}11	processesExecution := []ProcessExecution{12		{Pid: 0, StartTime: 0, FinishTime: 20},13		{Pid: 1, StartTime: 20, FinishTime: 30},14		{Pid: 2, StartTime: 30, FinishTime: 36},15		{Pid: 3, StartTime: 36, FinishTime: 44},16	}17	ttTime, responseTime, waitTime := AverageTime(processes, processesExecution, false)18	got := []float32{ttTime, responseTime, waitTime}19	want := []float32{30.5, 19.5, 19.5}20	if !reflect.DeepEqual(got, want) {21		t.Errorf("got %v, wanted %v", got, want)22	}23}24func TestCalcSjf(t *testing.T) {25	processes := []Process{26		{ID: 0, ArrivalTime: 0, Duration: 20}, {ID: 1, ArrivalTime: 0, Duration: 10},27		{ID: 2, ArrivalTime: 4, Duration: 6}, {ID: 3, ArrivalTime: 4, Duration: 8},28	}29	processesExecution := []ProcessExecution{30		{Pid: 1, StartTime: 0, FinishTime: 10},31		{Pid: 2, StartTime: 10, FinishTime: 16},32		{Pid: 3, StartTime: 16, FinishTime: 24},33		{Pid: 0, StartTime: 24, FinishTime: 44},34	}35	ttTime, responseTime, waitTime := AverageTime(processes, processesExecution, false)36	got := []float32{ttTime, responseTime, waitTime}37	want := []float32{21.5, 10.5, 10.5}38	if !reflect.DeepEqual(got, want) {39		t.Errorf("got %v, wanted %v", got, want)40	}41}42func TestCalcRoundRobin(t *testing.T) {43	processes := []Process{44		{ID: 0, ArrivalTime: 0, Duration: 20},45		{ID: 1, ArrivalTime: 0, Duration: 10},46		{ID: 2, ArrivalTime: 4, Duration: 6},47		{ID: 3, ArrivalTime: 4, Duration: 8},48	}49	processesExecution := []ProcessExecution{50		{Pid: 0, StartTime: 0, FinishTime: 2},51		{Pid: 1, StartTime: 2, FinishTime: 4},52		{Pid: 0, StartTime: 4, FinishTime: 6},53		{Pid: 2, StartTime: 6, FinishTime: 8},54		{Pid: 3, StartTime: 8, FinishTime: 10},55		{Pid: 1, StartTime: 10, FinishTime: 12},56		{Pid: 0, StartTime: 12, FinishTime: 14},57		{Pid: 2, StartTime: 14, FinishTime: 16},58		{Pid: 3, StartTime: 16, FinishTime: 18},59		{Pid: 1, StartTime: 18, FinishTime: 20},60		{Pid: 0, StartTime: 20, FinishTime: 22},61		{Pid: 2, StartTime: 22, FinishTime: 24},62		{Pid: 3, StartTime: 24, FinishTime: 26},63		{Pid: 1, StartTime: 26, FinishTime: 28},64		{Pid: 0, StartTime: 28, FinishTime: 30},65		{Pid: 3, StartTime: 30, FinishTime: 32},66		{Pid: 1, StartTime: 32, FinishTime: 34},67		{Pid: 0, StartTime: 34, FinishTime: 36},68		{Pid: 0, StartTime: 36, FinishTime: 38},69		{Pid: 0, StartTime: 38, FinishTime: 40},70		{Pid: 0, StartTime: 40, FinishTime: 42},71		{Pid: 0, StartTime: 42, FinishTime: 44},72	}73	ttTime, responseTime, waitTime := AverageTime(processes, processesExecution, true)74	got := []float32{ttTime, responseTime, waitTime}75	want := []float32{31.5, 2.0, 20.5}76	if !reflect.DeepEqual(got, want) {77		t.Errorf("got %v, wanted %v", got, want)78	}79}...

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