Function sched_exit_thread

freebsd/kern/sched_ule.c:2338–2354

* Penalize another thread for the time spent on this one. This helps to * worsen the priority and interactivity of processes which schedule batch * jobs such as make. This has little effect on the make process itself but * causes new processes spawned by it to receive worse scores immediately. */

 * causes new processes spawned by it to receive worse scores immediately.
 */
void
sched_exit_thread(struct thread *td, struct thread *child)
{

	KTR_STATE1(KTR_SCHED, "thread", sched_tdname(child), "thread exit",
	    "prio:%d", child->td_priority);
	/*
	 * Give the child's runtime to the parent without returning the
	 * sleep time as a penalty to the parent.  This causes shells that
	 * launch expensive things to mark their children as expensive.
	 */
	thread_lock(td);
	td_get_sched(td)->ts_runtime += td_get_sched(child)->ts_runtime;
	sched_interact_update(td);
	sched_priority(td);
	thread_unlock(td);
}

void
sched_preempt(struct thread *td)