コード例 #1
0
ファイル: process_32.c プロジェクト: OESF/linux-linaro-natty
/*
 * the idle loop on a Sparc... ;)
 */
void cpu_idle(void)
{
	/* endless idle loop with no priority at all */
	for (;;) {
		if (ARCH_SUN4C) {
			static int count = HZ;
			static unsigned long last_jiffies;
			static unsigned long last_faults;
			static unsigned long fps;
			unsigned long now;
			unsigned long faults;

			extern unsigned long sun4c_kernel_faults;
			extern void sun4c_grow_kernel_ring(void);

			local_irq_disable();
			now = jiffies;
			count -= (now - last_jiffies);
			last_jiffies = now;
			if (count < 0) {
				count += HZ;
				faults = sun4c_kernel_faults;
				fps = (fps + (faults - last_faults)) >> 1;
				last_faults = faults;
#if 0
				printk("kernel faults / second = %ld\n", fps);
#endif
				if (fps >= SUN4C_FAULT_HIGH) {
					sun4c_grow_kernel_ring();
				}
			}
			local_irq_enable();
		}

		if (pm_idle) {
			while (!need_resched())
				(*pm_idle)();
		} else {
			while (!need_resched())
				cpu_relax();
		}
		preempt_enable_no_resched();
		schedule();
		preempt_disable();
		check_pgt_cache();
	}
コード例 #2
0
ファイル: process.c プロジェクト: nhanh0/hah
/*
 * the idle loop on a Sparc... ;)
 */
int cpu_idle(void)
{
	int ret = -EPERM;

	if (current->pid != 0)
		goto out;

	/* endless idle loop with no priority at all */
	current->nice = 20;
	current->counter = -100;
	init_idle();

	for (;;) {
		if (ARCH_SUN4C_SUN4) {
			static int count = HZ;
			static unsigned long last_jiffies = 0;
			static unsigned long last_faults = 0;
			static unsigned long fps = 0;
			unsigned long now;
			unsigned long faults;
			unsigned long flags;

			extern unsigned long sun4c_kernel_faults;
			extern void sun4c_grow_kernel_ring(void);

			save_and_cli(flags);
			now = jiffies;
			count -= (now - last_jiffies);
			last_jiffies = now;
			if (count < 0) {
				count += HZ;
				faults = sun4c_kernel_faults;
				fps = (fps + (faults - last_faults)) >> 1;
				last_faults = faults;
#if 0
				printk("kernel faults / second = %d\n", fps);
#endif
				if (fps >= SUN4C_FAULT_HIGH) {
					sun4c_grow_kernel_ring();
				}
			}
			restore_flags(flags);
		}
		check_pgt_cache();
		schedule();
	}