newproc

proc.go

func newproc(siz int32, fn *funcval) {
	argp := add(unsafe.Pointer(&fn), sys.PtrSize)
	gp := getg()
	pc := getcallerpc()
	systemstack(func() {
		newg := newproc1(fn, argp, siz, gp, pc)

		_p_ := getg().m.p.ptr()
		runqput(_p_, newg, true) //true 始终把p的runnext设置为newg

		if mainStarted {
			wakep()
		}
	})
}


func runqput(_p_ *p, gp *g, next bool) {
	if randomizeScheduler && next && fastrand()%2 == 0 {
		next = false
	}

	if next {
	retryNext:
		oldnext := _p_.runnext
		if !_p_.runnext.cas(oldnext, guintptr(unsafe.Pointer(gp))) {
			goto retryNext
		}
		if oldnext == 0 {
			return
		}
		// Kick the old runnext out to the regular run queue.
		gp = oldnext.ptr()
	}
...
}