GoSyscallBegin dt=1 p_seq=1 stack=0
ProcStart dt=1 p=1 p_seq=1
GoSyscallEndBlocked dt=1
EventBatch gen=1 m=1 time=0 size=5
ProcSteal dt=1 p=0 p_seq=2 m=0
EventBatch gen=1 m=18446744073709551615 time=0 size=5
Frequency freq=15625000
EventBatch gen=1 m=18446744073709551615 time=0 size=1
Stacks
EventBatch gen=1 m=18446744073709551615 time=0 size=1

GoDestroySyscall dt=1
EventBatch gen=1 m=0 time=0 size=13
ProcStatus dt=1 p=1 pstatus=2
ProcStart dt=1 p=1 p_seq=1
ProcSteal dt=1 p=0 p_seq=3 m=0
EventBatch gen=1 m=18446744073709551615 time=0 size=5
Frequency freq=15625000
EventBatch gen=1 m=18446744073709551615 time=0 size=1
Stacks
EventBatch gen=1 m=18446744073709551615 time=0 size=1

		if err == io.EOF {
			break
		}

		fields := strings.Fields(line)
		if len(fields) != expectedNumFieldsPerLine {
			// ignore incorrect lines.
			continue
		}

		// Freq should be an integer.
		if _, err := strconv.Atoi(fields[4]); err != nil {
			return nil, err
		}

		// Pass should be an integer.
		if _, err := strconv.Atoi(fields[5]); err != nil {
			return nil, err
		}

EventBatch gen=1 m=1 time=0 size=18
ProcStatus dt=1 p=2 pstatus=1
GoStatus dt=1 g=2 m=1 gstatus=2
ProcStatus dt=1 p=0 pstatus=4
ProcSteal dt=1 p=0 p_seq=1 m=0
EventBatch gen=1 m=18446744073709551615 time=0 size=5
Frequency freq=15625000
EventBatch gen=1 m=18446744073709551615 time=0 size=1
Stacks
EventBatch gen=1 m=18446744073709551615 time=0 size=1

package mountinfo

// mountInfo - This represents a single line in /proc/mounts.
type mountInfo struct {
	Device  string
	Path    string
	FSType  string
	Options []string
	Freq    string
	Pass    string
}

func (m mountInfo) String() string {
	return m.Path
}

// mountInfos - This represents the entire /proc/mounts.

		// Reset CPU samples cursor.
		r.cpuSamples = r.gen.cpuSamples

		// Reset frontier.
		for m, batches := range r.gen.batches {
			bc := &batchCursor{m: m}
			ok, err := bc.nextEvent(batches, r.gen.freq)
			if err != nil {
				return Event{}, err
			}
			if !ok {
				// Turns out there aren't actually any events in these batches.
				continue
			}
			r.frontier = heapInsert(r.frontier, bc)
		}

	// (trace clock units / nanoseconds) * (1e9 nanoseconds / 1 second)
	return uint64(1.0 / float64(traceTimeDiv) * 1e9)
}

// traceFrequency writes a batch with a single EvFrequency event.
//
// freq is the number of trace clock units per second.
func traceFrequency(gen uintptr) {
	w := unsafeTraceWriter(gen, nil)

	// Ensure we have a place to write to.

	EvCPUSamples // start of a section of CPU samples [...EvCPUSample]
	EvCPUSample  // CPU profiling sample [timestamp, M ID, P ID, goroutine ID, stack ID]
	EvFrequency  // timestamp units per sec [freq]

	// Procs.
	EvProcsChange // current value of GOMAXPROCS [timestamp, GOMAXPROCS, stack ID]
	EvProcStart   // start of P [timestamp, P ID, P seq]
	EvProcStop    // stop of P [timestamp]

)

type Timespec struct {
	Sec  int64
	Nsec int64
}

type Timeval struct {
	Sec  int64
	Usec int64
}

type Timex struct {
	Modes     uint32
	Pad_cgo_0 [4]byte
	Offset    int64
	Freq      int64
	Maxerror  int64
	Esterror  int64
	Status    int32
	Pad_cgo_1 [4]byte
	Constant  int64
	Precision int64
	Tolerance int64
	Time      Timeval
	Tick      int64
	Ppsfreq   int64
	Jitter    int64

)

type Timespec struct {
	Sec  int64
	Nsec int64
}

type Timeval struct {
	Sec  int64
	Usec int64
}

type Timex struct {
	Modes     uint32
	Pad_cgo_0 [4]byte
	Offset    int64
	Freq      int64
	Maxerror  int64
	Esterror  int64
	Status    int32
	Pad_cgo_1 [4]byte
	Constant  int64
	Precision int64
	Tolerance int64
	Time      Timeval
	Tick      int64
	Ppsfreq   int64
	Jitter    int64