Function sched_fork

freebsd/kern/sched_ule.c:2242–2256

* Penalize the parent for creating a new child and initialize the child's * priority. */

 * priority.
 */
void
sched_fork(struct thread *td, struct thread *child)
{
	THREAD_LOCK_ASSERT(td, MA_OWNED);
	sched_pctcpu_update(td_get_sched(td), 1);
	sched_fork_thread(td, child);
	/*
	 * Penalize the parent and child for forking.
	 */
	sched_interact_fork(child);
	sched_priority(child);
	td_get_sched(td)->ts_runtime += tickincr;
	sched_interact_update(td);
	sched_priority(td);
}

/*
 * Fork a new thread, may be within the same process.