C++ (Cpp) this_cpu_loadx Examples

Example #1

File: rtcc.c Project: acorn-marvell/brillo_pxa_kernel

/*
 * RTCC idle handler, called when CPU is idle
 */
static int rtcc_idle_handler(struct notifier_block *nb, unsigned long val, void *data)
{
	if (likely(!atomic_read(&krtccd_enabled)))
		return 0;

	if (likely(atomic_read(&need_to_reclaim) == 0))
		return 0;

	// To prevent RTCC from running too frequently
	if (likely(time_before(jiffies, prev_jiffy + rtcc_reclaim_jiffies)))
		return 0;

	if (unlikely(atomic_read(&kswapd_running) == 1))
		return 0;

	if (unlikely(idle_cpu(task_cpu(krtccd)) && this_cpu_loadx(3) == 0) || rtcc_boost_mode) {
		if (likely(atomic_read(&krtccd_running) == 0)) {
			atomic_set(&krtccd_running, 1);

			wake_up_process(krtccd);
			prev_jiffy = jiffies;
		}
	}

	return 0;
}

Example #2

File: lowmemorykiller.c Project: iTechnoguy/kernel-nk1-negalite-lt02ltespr

void could_cswap(void)
{
	if (atomic_read(&s_reclaim.need_to_reclaim) == 0)
		return;

	if (time_before(jiffies, prev_jiffy + minimum_interval_time))
		return;

	if (atomic_read(&s_reclaim.lmk_running) == 1 || atomic_read(&kswapd_thread_on) == 1) 
		return;

	if (get_nr_swap_pages() < minimum_freeswap_pages)
		return;

	if (idle_cpu(task_cpu(s_reclaim.kcompcached)) && this_cpu_loadx(4) == 0) {
		if (atomic_read(&s_reclaim.kcompcached_running) == 0) {
			wake_up_process(s_reclaim.kcompcached);
			atomic_set(&s_reclaim.kcompcached_running, 1);
			prev_jiffy = jiffies;
		}
	}
}