C++ (Cpp) sched_group_set_shares Examples

Example #1

int proc_sched_autogroup_set_nice(struct task_struct *p, int *nice)
{
	static unsigned long next = INITIAL_JIFFIES;
	struct autogroup *ag;
	int err;

	if (*nice < -20 || *nice > 19)
		return -EINVAL;

	err = security_task_setnice(current, *nice);
	if (err)
		return err;

	if (*nice < 0 && !can_nice(current, *nice))
		return -EPERM;

	/* this is a heavy operation taking global locks.. */
	if (!capable(CAP_SYS_ADMIN) && time_before(jiffies, next))
		return -EAGAIN;

	next = HZ / 10 + jiffies;
	ag = autogroup_task_get(p);

	down_write(&ag->lock);
	err = sched_group_set_shares(ag->tg, prio_to_weight[*nice + 20]);
	if (!err)
		ag->nice = *nice;
	up_write(&ag->lock);

	autogroup_kref_put(ag);

	return err;
}

Example #2

File: linsched.c Project: JianguoWEI/Linux-EFQ

int linsched_test_main(int argc, char **argv)
{
	struct task_struct *p;
	struct cgroup *cgrp;


	/* Initialize linsched. */
	linsched_init(NULL);

	cgrp = linsched_create_cgroup(root_cgroup, "test");
	sched_group_set_shares(cgroup_tg(cgrp), 2048);

	/* Create some tasks with "callbacks" that should be called
	 * every scheduling decision.
	 */
	linsched_create_normal_task(linsched_create_sleep_run(8, 2), 0);

	linsched_create_RTrr_task(linsched_create_sleep_run(8, 2), 90);
	linsched_create_RTfifo_task(linsched_create_sleep_run(8, 2), 55);

	/* create more tasks here... */

	p = linsched_create_normal_task(linsched_create_sleep_run(8, 2), 0);
	linsched_add_task_to_group(p, cgrp);

	linsched_create_normal_task(linsched_create_sleep_run(8, 2), 0);
	linsched_create_normal_task(linsched_create_sleep_run(8, 2), 0);
	linsched_create_normal_task(linsched_create_sleep_run(8, 2), 0);
	linsched_create_normal_task(linsched_create_sleep_run(8, 2), 0);

	/* Run simulation for 500 ticks. */
	linsched_run_sim(500);

#if 0
	/* Force migrations between two CPUs, and allow migrations
	 * afterwards (so load balancing will kick in eventually).
	 */
	linsched_force_migration(linsched_get_task(2), 0, 1);

#endif
	/* Run simulation to completion. */
	linsched_run_sim(LINSCHED_TICKS-500);

	return 0;
}