Function sched_bind

freebsd/kern/sched_ule.c:2712–2731

* Bind a thread to a target cpu. */

 * Bind a thread to a target cpu.
 */
void
sched_bind(struct thread *td, int cpu)
{
	struct td_sched *ts;

	THREAD_LOCK_ASSERT(td, MA_OWNED|MA_NOTRECURSED);
	KASSERT(td == curthread, ("sched_bind: can only bind curthread"));
	ts = td_get_sched(td);
	if (ts->ts_flags & TSF_BOUND)
		sched_unbind(td);
	KASSERT(THREAD_CAN_MIGRATE(td), ("%p must be migratable", td));
	ts->ts_flags |= TSF_BOUND;
	sched_pin();
	if (PCPU_GET(cpuid) == cpu)
		return;
	ts->ts_cpu = cpu;
	/* When we return from mi_switch we'll be on the correct cpu. */
	mi_switch(SW_VOL);
	thread_lock(td);
}

/*
 * Release a bound thread.