GoDestroy dt=2
ProcStop dt=28
ProcStart dt=141923 p=0 p_seq=12
ProcStop dt=19
ProcStart dt=16780 p=0 p_seq=13
GoUnblock dt=22 g=43 g_seq=2 stack=0
GoStart dt=162 g=43 g_seq=3
UserTaskEnd dt=16 task=15 stack=36
UserRegionEnd dt=12 task=14 name_string=31 stack=28
GoDestroy dt=2
ProcStop dt=8
ProcStart dt=1532 p=2 p_seq=9
ProcStop dt=12
ProcStart dt=141906 p=4 p_seq=11
ProcStop dt=16

func (tl traceLocker) Gomaxprocs(procs int32) {
	tl.eventWriter(traceGoRunning, traceProcRunning).commit(traceEvProcsChange, traceArg(procs), tl.stack(1))
}

// ProcStart traces a ProcStart event.
//
// Must be called with a valid P.
func (tl traceLocker) ProcStart() {
	pp := tl.mp.p.ptr()
	// Procs are typically started within the scheduler when there is no user goroutine. If there is a user goroutine,

	EvProcsChange: event.Spec{
		Name:         "ProcsChange",
		Args:         []string{"dt", "procs_value", "stack"},
		IsTimedEvent: true,
		StackIDs:     []int{2},
	},
	EvProcStart: event.Spec{
		Name:         "ProcStart",
		Args:         []string{"dt", "p", "p_seq"},
		IsTimedEvent: true,
	},
	EvProcStop: event.Spec{
		Name:         "ProcStop",
		Args:         []string{"dt"},
		IsTimedEvent: true,
	},

	EvStack:             {"Stack", 5, false, []string{"id", "siz"}, nil},
	EvGomaxprocs:        {"Gomaxprocs", 5, true, []string{"procs"}, nil},
	EvProcStart:         {"ProcStart", 5, false, []string{"thread"}, nil},
	EvProcStop:          {"ProcStop", 5, false, []string{}, nil},
	EvGCStart:           {"GCStart", 5, true, []string{"seq"}, nil}, // in 1.5 format it was {}