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C++ cpu_down函数代码示例

原作者: [db:作者] 来自: [db:来源] 收藏 邀请

本文整理汇总了C++中cpu_down函数的典型用法代码示例。如果您正苦于以下问题：C++ cpu_down函数的具体用法？C++ cpu_down怎么用？C++ cpu_down使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。



在下文中一共展示了cpu_down函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: rtas_cpu_state_change_mask

/* On return cpumask will be altered to indicate CPUs changed.
 * CPUs with states changed will be set in the mask,
 * CPUs with status unchanged will be unset in the mask. */
static int rtas_cpu_state_change_mask(enum rtas_cpu_state state,
				cpumask_var_t cpus)
{
	int cpu;
	int cpuret = 0;
	int ret = 0;

	if (cpumask_empty(cpus))
		return 0;

	for_each_cpu(cpu, cpus) {
		switch (state) {
		case DOWN:
			cpuret = cpu_down(cpu);
			break;
		case UP:
			cpuret = cpu_up(cpu);
			break;
		}
		if (cpuret) {
			pr_debug("%s: cpu_%s for cpu#%d returned %d.\n",
					__func__,
					((state == UP) ? "up" : "down"),
					cpu, cpuret);
			if (!ret)
				ret = cpuret;
			if (state == UP) {
				/* clear bits for unchanged cpus, return */
				cpumask_shift_right(cpus, cpus, cpu);
				cpumask_shift_left(cpus, cpus, cpu);
				break;
			} else {
				/* clear bit for unchanged cpu, continue */
				cpumask_clear_cpu(cpu, cpus);
			}
		}
	}

	return ret;
}
开发者ID:CaptainThrowback，项目名称:android_kernel_htc_pme，代码行数:43，代码来源:rtas.c


示例2: store_online

static ssize_t __ref store_online(struct device *dev,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	struct cpu *cpu = container_of(dev, struct cpu, dev);
	int cpuid = cpu->dev.id;
	int from_nid, to_nid;
	ssize_t ret;

	cpu_hotplug_driver_lock();
	switch (buf[0]) {
	case '0':
		ret = cpu_down(cpuid);
		if (!ret)
			kobject_uevent(&dev->kobj, KOBJ_OFFLINE);
		break;
	case '1':
		from_nid = cpu_to_node(cpuid);
		ret = cpu_up(cpuid);

		/*
		 * When hot adding memory to memoryless node and enabling a cpu
		 * on the node, node number of the cpu may internally change.
		 */
		to_nid = cpu_to_node(cpuid);
		if (from_nid != to_nid)
			change_cpu_under_node(cpu, from_nid, to_nid);

		if (!ret)
			kobject_uevent(&dev->kobj, KOBJ_ONLINE);
		break;
	default:
		ret = -EINVAL;
	}
	cpu_hotplug_driver_unlock();

	if (ret >= 0)
		ret = count;
	return ret;
}
开发者ID:OneEducation，项目名称:kernel-rk310-lollipop-firefly，代码行数:40，代码来源:cpu.c


示例3: disable_nonboot_cpus

void disable_nonboot_cpus(void)
{
	int cpu, error;

	error = 0;
	cpus_clear(frozen_cpus);
	printk("Freezing cpus ...\n");
	for_each_online_cpu(cpu) {
		if (cpu == 0)
			continue;
		error = cpu_down(cpu);
		if (!error) {
			cpu_set(cpu, frozen_cpus);
			printk("CPU%d is down\n", cpu);
			continue;
		}
		printk("Error taking cpu %d down: %d\n", cpu, error);
	}
	BUG_ON(raw_smp_processor_id() != 0);
	if (error)
		panic("cpus not sleeping");
}
开发者ID:FatSunHYS，项目名称:OSCourseDesign，代码行数:22，代码来源:smp.c


示例4: min_max_constraints_workfunc

static void min_max_constraints_workfunc(struct work_struct *work)
{
	int count = -1;
	bool up = false;
	unsigned int cpu;

	int nr_cpus = num_online_cpus();
	int max_cpus = pm_qos_request(PM_QOS_MAX_ONLINE_CPUS) ? : 4;
	int min_cpus = pm_qos_request(PM_QOS_MIN_ONLINE_CPUS);

	if (cpq_state == TEGRA_CPQ_DISABLED)
		return;

	if (is_lp_cluster())
		return;

	if (nr_cpus < min_cpus) {
		up = true;
		count = min_cpus - nr_cpus;
	} else if (nr_cpus > max_cpus && max_cpus >= min_cpus) {
		count = nr_cpus - max_cpus;
	}

	for (;count > 0; count--) {
		if (up) {
			cpu = cpumask_next_zero(0, cpu_online_mask);
			if (cpu < nr_cpu_ids)
				cpu_up(cpu);
			else
				break;
		} else {
			cpu = cpumask_next(0, cpu_online_mask);
			if (cpu < nr_cpu_ids)
				cpu_down(cpu);
			else
				break;
		}
	}
}
开发者ID:BxMxK，项目名称:android_kernel_asus_tf700t，代码行数:39，代码来源:cpuquiet.c


示例5: store_cpucore_max_num_limit

static ssize_t __ref store_cpucore_max_num_limit(struct kobject *kobj,
			struct attribute *attr, const char *buf, size_t count)
{
	int input, delta, cpu;

	if (!sscanf(buf, "%u", &input))
		return -EINVAL;

	if (input < 1 || input > 4) {
		pr_err("Must keep input range 1 ~ 4\n");
		return -EINVAL;
	}

	delta = input - num_online_cpus();

	if (delta > 0) {
		cpu = 1;
		while (delta) {
			if (!cpu_online(cpu)) {
				cpu_up(cpu);
				delta--;
			}
			cpu++;
		}
	} else if (delta < 0) {
		cpu = 3;
		while (delta) {
			if (cpu_online(cpu)) {
				cpu_down(cpu);
				delta++;
			}
			cpu--;
		}
	}

	max_num_cpu = input;

	return count;
}
开发者ID:619619，项目名称:T805-Basicrom-Kernel，代码行数:39，代码来源:exynos-interface.c


示例6: setup_cpu_watcher

static int setup_cpu_watcher(struct notifier_block *notifier,
			      unsigned long event, void *data)
{
	int cpu;
	static struct xenbus_watch cpu_watch = {
		.node = "cpu",
		.callback = handle_vcpu_hotplug_event};

	(void)register_xenbus_watch(&cpu_watch);

	for_each_possible_cpu(cpu) {
		if (vcpu_online(cpu) == 0) {
			(void)cpu_down(cpu);
			set_cpu_present(cpu, false);
		}
	}

	return NOTIFY_DONE;
}

static int __init setup_vcpu_hotplug_event(void)
{
	static struct notifier_block xsn_cpu = {
		.notifier_call = setup_cpu_watcher };

#ifdef CONFIG_X86
	if (!xen_pv_domain() && !xen_pvh_domain())
#else
	if (!xen_domain())
#endif
		return -ENODEV;

	register_xenstore_notifier(&xsn_cpu);

	return 0;
}

arch_initcall(setup_vcpu_hotplug_event);
开发者ID:Anjali05，项目名称:linux，代码行数:38，代码来源:cpu_hotplug.c


示例7: store_online

static ssize_t store_online(struct sys_device *dev, const char *buf,
			    size_t count)
{
	struct cpu *cpu = container_of(dev, struct cpu, sysdev);
	ssize_t ret;

	switch (buf[0]) {
	case '0':
		ret = cpu_down(cpu->sysdev.id);
		if (!ret)
			kobject_hotplug(&dev->kobj, KOBJ_OFFLINE);
		break;
	case '1':
		ret = cpu_up(cpu->sysdev.id);
		break;
	default:
		ret = -EINVAL;
	}

	if (ret >= 0)
		ret = count;
	return ret;
}
开发者ID:GodFox，项目名称:magx_kernel_xpixl，代码行数:23，代码来源:cpu.c


示例8: hps_early_suspend

static void hps_early_suspend(struct early_suspend *h)
{
    hps_warn("hps_early_suspend\n");

    mutex_lock(&hps_ctxt.lock);
    hps_ctxt.state = STATE_EARLY_SUSPEND;

    hps_ctxt.rush_boost_enabled_backup = hps_ctxt.rush_boost_enabled;
    hps_ctxt.rush_boost_enabled = 0;

    //Reset data structure of statistics process while enter early suspend mode.
    hps_ctxt.up_loads_sum = 0;
    hps_ctxt.up_loads_count = 0;
    hps_ctxt.up_loads_history_index = 0;
    hps_ctxt.up_loads_history[hps_ctxt.es_up_times - 1] = 0;
    hps_ctxt.down_loads_sum = 0;
    hps_ctxt.down_loads_count = 0;
    hps_ctxt.down_loads_history_index = 0;
    hps_ctxt.down_loads_history[hps_ctxt.es_down_times - 1] = 0;
    
    if (hps_ctxt.is_hmp && hps_ctxt.early_suspend_enabled)
    {
        unsigned int cpu;
        for (cpu = hps_ctxt.big_cpu_id_max; cpu >= hps_ctxt.big_cpu_id_min; --cpu)
        {
            if (cpu_online(cpu))
                cpu_down(cpu);
        }
    }
    mutex_unlock(&hps_ctxt.lock);
		atomic_set(&hps_ctxt.is_ondemand, 1);
    hps_warn("state: %u, enabled: %u, early_suspend_enabled: %u, suspend_enabled: %u, rush_boost_enabled: %u\n",
        hps_ctxt.state, hps_ctxt.enabled, hps_ctxt.early_suspend_enabled, hps_ctxt.suspend_enabled, hps_ctxt.rush_boost_enabled);

    return;
}
开发者ID:iuncuim，项目名称:A476_V1B_5.1_kernel，代码行数:36，代码来源:mt_hotplug_strategy_main.c


示例9: tplug_work_fn

static void __cpuinit tplug_work_fn(struct work_struct *work)
{
	int i;
	unsigned int load[8], avg_load[8];

	switch(endurance_level)
	{
	case 0:
		core_limit = NR_CPUS;
	break;
	case 1:
		core_limit = NR_CPUS / 2;
	break;
	case 2:
		core_limit = NR_CPUS / 4;
	break;
	default:
		core_limit = NR_CPUS;
	break;
	}

	for(i = 0 ; i < core_limit; i++)
	{
		if(cpu_online(i))
			load[i] = get_curr_load(i);
		else
			load[i] = 0;

		avg_load[i] = ((int) load[i] + (int) last_load[i]) / 2;
		last_load[i] = load[i];
	}

	for(i = 0 ; i < core_limit; i++)
	{
	if(cpu_online(i) && avg_load[i] > load_threshold && cpu_is_offline(i+1))
	{
	if(DEBUG)
		pr_info("%s : bringing back cpu%d\n", THUNDERPLUG,i);
		if(!((i+1) > 7)) {
			last_time[i+1] = ktime_to_ms(ktime_get());
			cpu_up(i+1);
		}
	}
	else if(cpu_online(i) && avg_load[i] < load_threshold && cpu_online(i+1))
	{
		if(DEBUG)
			pr_info("%s : offlining cpu%d\n", THUNDERPLUG,i);
			if(!(i+1)==0) {
				now[i+1] = ktime_to_ms(ktime_get());
				if((now[i+1] - last_time[i+1]) > MIN_CPU_UP_TIME)
					cpu_down(i+1);
			}
		}
	}
#ifdef CONFIG_USES_MALI_MP2_GPU
	if(gpu_hotplug_enabled) {
		if(DEBUG)
			pr_info("%s: current gpu load %d\n", THUNDERPLUG, get_gpu_load());
		if(get_gpu_load() > gpu_min_load_threshold) {
			if(get_gpu_cores_enabled() < 2) {
				enable_gpu_cores(2);
				if(DEBUG)
					pr_info("%s: gpu1 onlined\n", THUNDERPLUG);
			}
		}
		else {
			if(get_gpu_cores_enabled() > 1) {
				enable_gpu_cores(1);
				if(DEBUG)
					pr_info("%s: gpu1 offlined\n", THUNDERPLUG);
			}
		}
	}
#endif

#ifdef CONFIG_SCHED_HMP
    if(tplug_hp_style == 1 && !isSuspended)
#else
	if(tplug_hp_enabled != 0 && !isSuspended)
#endif
		queue_delayed_work_on(0, tplug_wq, &tplug_work,
			msecs_to_jiffies(sampling_time));
	else {
		if(!isSuspended)
			cpus_online_all();
		else
			thunderplug_suspend();
	}

}
开发者ID:AudriusMTK，项目名称:Zeus_sprout，代码行数:90，代码来源:thunderplug.c


示例10: tegra_auto_hotplug_work_func

static void tegra_auto_hotplug_work_func(struct work_struct *work)
{
	bool up = false;
	unsigned int cpu = nr_cpu_ids;

	mutex_lock(tegra3_cpu_lock);
	if (mp_policy && !is_lp_cluster()) {
		mutex_unlock(tegra3_cpu_lock);
		return;
	}

	switch (hp_state) {
	case TEGRA_HP_DISABLED:
	case TEGRA_HP_IDLE:
		break;
	case TEGRA_HP_DOWN:
		cpu = tegra_get_slowest_cpu_n();
		if (cpu < nr_cpu_ids) {
			up = false;
			queue_delayed_work(
				hotplug_wq, &hotplug_work, down_delay);
			hp_stats_update(cpu, false);
		} else if (!is_lp_cluster() && !no_lp) {
			if(!clk_set_parent(cpu_clk, cpu_lp_clk)) {
				CPU_DEBUG_PRINTK(CPU_DEBUG_HOTPLUG, " enter LPCPU");
				hp_stats_update(CONFIG_NR_CPUS, true);
				hp_stats_update(0, false);
				/* catch-up with governor target speed */
				tegra_cpu_set_speed_cap(NULL);
			} else
				queue_delayed_work(
					hotplug_wq, &hotplug_work, down_delay);
		}
		break;
	case TEGRA_HP_UP:
		if (is_lp_cluster() && !no_lp) {
			if(!clk_set_parent(cpu_clk, cpu_g_clk)) {
				CPU_DEBUG_PRINTK(CPU_DEBUG_HOTPLUG,
						 " leave LPCPU (%s)", __func__);
				hp_stats_update(CONFIG_NR_CPUS, false);
				hp_stats_update(0, true);
				/* catch-up with governor target speed */
				tegra_cpu_set_speed_cap(NULL);
			}
		} else {
			switch (tegra_cpu_speed_balance()) {
			/* cpu speed is up and balanced - one more on-line */
			case TEGRA_CPU_SPEED_BALANCED:
				cpu = cpumask_next_zero(0, cpu_online_mask);
				if (cpu < nr_cpu_ids) {
					up = true;
					hp_stats_update(cpu, true);
				}
				break;
			/* cpu speed is up, but skewed - remove one core */
			case TEGRA_CPU_SPEED_SKEWED:
				cpu = tegra_get_slowest_cpu_n();
				if (cpu < nr_cpu_ids) {
					up = false;
					hp_stats_update(cpu, false);
				}
				break;
			/* cpu speed is up, but under-utilized - do nothing */
			case TEGRA_CPU_SPEED_BIASED:
			default:
				break;
			}
		}
		queue_delayed_work(
			hotplug_wq, &hotplug_work, up2gn_delay);
		break;
	default:
		pr_err(CPU_HOTPLUG_TAG"%s: invalid tegra hotplug state %d\n",
		       __func__, hp_state);
	}

	mutex_unlock(tegra3_cpu_lock);

	if (system_state > SYSTEM_RUNNING) {
		pr_info(CPU_HOTPLUG_TAG" system is not running\n");
	} else if (cpu < nr_cpu_ids) {
		if (up) {
			updateCurrentCPUTotalActiveTime();
			cpu_up(cpu);
			pr_info(CPU_HOTPLUG_TAG" turn on CPU %d, online CPU 0-3=[%d%d%d%d]\n",
					cpu, cpu_online(0), cpu_online(1), cpu_online(2), cpu_online(3));
		} else {
			updateCurrentCPUTotalActiveTime();
			cpu_down(cpu);

			pr_info(CPU_HOTPLUG_TAG" turn off CPU %d, online CPU 0-3=[%d%d%d%d]\n",
					cpu, cpu_online(0), cpu_online(1), cpu_online(2), cpu_online(3));
		}
	}
}
开发者ID:tg-endeavoru-jellybean，项目名称:android_kernel_htc_endeavoru，代码行数:95，代码来源:cpu-tegra3.c


示例11: tplug_work_fn

static void __cpuinit tplug_work_fn(struct work_struct *work)
{
	int i;
	unsigned int load[8], avg_load[8];

	switch(endurance_level)
	{
	case 0:
		core_limit = 8;
	break;
	case 1:
		core_limit = 4;
	break;
	case 2:
		core_limit = 2;
	break;
	default:
		core_limit = 8;
	break;
	}

	for(i = 0 ; i < core_limit; i++)
	{
		if(cpu_online(i))
			load[i] = get_curr_load(i);
		else
			load[i] = 0;

		avg_load[i] = ((int) load[i] + (int) last_load[i]) / 2;
		last_load[i] = load[i];
	}

	for(i = 0 ; i < core_limit; i++)
	{
	if(cpu_online(i) && avg_load[i] > load_threshold && cpu_is_offline(i+1))
	{
	if(DEBUG)
		pr_info("%s : bringing back cpu%d\n", THUNDERPLUG,i);
		if(!((i+1) > 7))
			cpu_up(i+1);
	}
	else if(cpu_online(i) && avg_load[i] < load_threshold && cpu_online(i+1))
	{
	if(DEBUG)
		pr_info("%s : offlining cpu%d\n", THUNDERPLUG,i);
		if(!(i+1)==0)
			cpu_down(i+1);
	}
	}

	if(tplug_hp_enabled != 0 && !isSuspended)
		queue_delayed_work_on(0, tplug_wq, &tplug_work,
			msecs_to_jiffies(sampling_time));
	else {
		if(!isSuspended)
			cpus_online_all();
		else
			thunderplug_suspend();
	}

}
开发者ID:cleverior，项目名称:octopus_kernel_msm8916，代码行数:61，代码来源:thunderplug.c


示例12: hotplug_timer

static void hotplug_timer(struct work_struct *work)
{
	struct cpu_hotplug_info tmp_hotplug_info[4];
	int i;
	unsigned int load = 0;
	unsigned int cpu_rq_min=0;
	unsigned long nr_rq_min = -1UL;
	unsigned int select_off_cpu = 0;
	enum flag flag_hotplug;

	mutex_lock(&hotplug_lock);

	if (user_lock == 1)
		goto no_hotplug;

	for_each_online_cpu(i) {
		struct cpu_time_info *tmp_info;
		cputime64_t cur_wall_time, cur_idle_time;
		unsigned int idle_time, wall_time;

		tmp_info = &per_cpu(hotplug_cpu_time, i);

		cur_idle_time = get_cpu_idle_time_us(i, &cur_wall_time);

		idle_time = (unsigned int)cputime64_sub(cur_idle_time,
							tmp_info->prev_cpu_idle);
		tmp_info->prev_cpu_idle = cur_idle_time;

		wall_time = (unsigned int)cputime64_sub(cur_wall_time,
							tmp_info->prev_cpu_wall);
		tmp_info->prev_cpu_wall = cur_wall_time;

		if (wall_time < idle_time)
			goto no_hotplug;

		tmp_info->load = 100 * (wall_time - idle_time) / wall_time;

		load += tmp_info->load;
		/*find minimum runqueue length*/
		tmp_hotplug_info[i].nr_running = get_cpu_nr_running(i);

		if (i && nr_rq_min > tmp_hotplug_info[i].nr_running) {
			nr_rq_min = tmp_hotplug_info[i].nr_running;

			cpu_rq_min = i;
		}
	}

	for (i = NUM_CPUS - 1; i > 0; --i) {
		if (cpu_online(i) == 0) {
			select_off_cpu = i;
			break;
		}
	}

	/*standallone hotplug*/
	flag_hotplug = standalone_hotplug(load, nr_rq_min, cpu_rq_min);

	/*cpu hotplug*/
	if (flag_hotplug == HOTPLUG_IN && cpu_online(select_off_cpu) == CPU_OFF) {
#ifndef PRODUCT_SHIP
		DBG_PRINT("cpu%d turning on!\n", select_off_cpu);
#endif
		cpu_up(select_off_cpu);
#ifndef PRODUCT_SHIP
		DBG_PRINT("cpu%d on\n", select_off_cpu);
#endif
		hotpluging_rate = CHECK_DELAY * 4;
	} else if (flag_hotplug == HOTPLUG_OUT && cpu_online(cpu_rq_min) == CPU_ON) {
#ifndef PRODUCT_SHIP
		DBG_PRINT("cpu%d turnning off!\n", cpu_rq_min);
#endif
		cpu_down(cpu_rq_min);
#ifndef PRODUCT_SHIP
		DBG_PRINT("cpu%d off!\n", cpu_rq_min);
#endif
		hotpluging_rate = CHECK_DELAY;
	} 

no_hotplug:

	queue_delayed_work_on(0, hotplug_wq, &hotplug_work, hotpluging_rate);

	mutex_unlock(&hotplug_lock);
}
开发者ID:1yankeedt，项目名称:D710BST_FL24_Kernel，代码行数:85，代码来源:stand-hotplug.c


示例13: set_cpu_config

static void set_cpu_config(enum ux500_uc new_uc)
{
	bool update = false;
	int cpu;
	int min_freq, max_freq;

	if (new_uc != current_uc)
		update = true;
	else if ((user_config_updated) && (new_uc == UX500_UC_USER))
		update = true;

	pr_debug("%s: new_usecase=%d, current_usecase=%d, update=%d\n",
		__func__, new_uc, current_uc, update);

	if (!update)
		goto exit;

	/* Cpu hotplug */
	if (!(usecase_conf[new_uc].second_cpu_online) &&
	    (num_online_cpus() > 1))
		cpu_down(1);
	else if ((usecase_conf[new_uc].second_cpu_online) &&
		 (num_online_cpus() < 2))
		cpu_up(1);

	if (usecase_conf[new_uc].max_arm)
		max_freq = usecase_conf[new_uc].max_arm;
	else
		max_freq = system_max_freq;

	if (usecase_conf[new_uc].min_arm)
		min_freq = usecase_conf[new_uc].min_arm;
	else
		min_freq = system_min_freq;

	for_each_online_cpu(cpu)
		set_cpufreq(cpu,
			    min_freq,
			    max_freq);

	/* Kinda doing the job twice, but this is needed for reference keeping */
	if (usecase_conf[new_uc].min_arm)
		prcmu_qos_update_requirement(PRCMU_QOS_ARM_KHZ,
					     "usecase",
					     usecase_conf[new_uc].min_arm);
	else
		prcmu_qos_update_requirement(PRCMU_QOS_ARM_KHZ,
					     "usecase",
					     PRCMU_QOS_DEFAULT_VALUE);

	/* Cpu idle */
	cpuidle_set_multiplier(usecase_conf[new_uc].cpuidle_multiplier);

	/* L2 prefetch */
	if (usecase_conf[new_uc].l2_prefetch_en)
		outer_prefetch_enable();
	else
		outer_prefetch_disable();

	/* Force cpuidle state */
	cpuidle_force_state(usecase_conf[new_uc].forced_state);

	/* QOS override */
	prcmu_qos_voice_call_override(usecase_conf[new_uc].vc_override);

	current_uc = new_uc;

exit:
	/* Its ok to clear even if new_uc != UX500_UC_USER */
	user_config_updated = false;
}
开发者ID:1DeMaCr，项目名称:Codina_Kernel-3.x，代码行数:71，代码来源:usecase_gov.c


示例14: hotplug_timer

static void hotplug_timer(struct work_struct *work)
{
	extern unsigned int sysctl_sched_olord_period;
	unsigned int i, load = 0;
	int offline_target = -1, online_target = -1;
	struct cpu_time_info *tmp_info;
	cputime64_t cur_wall_time, cur_idle_time;
	unsigned int idle_time, wall_time;
	
	printk(KERN_INFO "%u\n", sysctl_sched_olord_period);
	
	mutex_lock(&hotplug_lock);
	
	/* Find the target CPUs for online and offline */
	for (i = 0; i < (sizeof cpus / sizeof (int)); i++){

		//printk(KERN_INFO "cpus[%u]: %u\n", i, cpus[i]);

		if(cpu_online(cpus[i])){
			offline_target = cpus[i];
			break;
		}
		else
			online_target = cpus[i];
	}
	
	//printk(KERN_INFO "offline: %d, online %d\n", offline_target, online_target);
	
	
	/* Calculate load */
	tmp_info = &per_cpu(hotplug_cpu_time, offline_target);

	cur_idle_time = get_cpu_idle_time_us(offline_target, &cur_wall_time);

	/* Use cputime64_sub for older kernels */
	//idle_time = (unsigned int)cputime64_sub(cur_idle_time,
	//		tmp_info->prev_cpu_idle);
	idle_time = (unsigned int)(cur_idle_time - tmp_info->prev_cpu_idle);

	tmp_info->prev_cpu_idle = cur_idle_time;

	/* Use cputime64_sub for older kernels */
	//wall_time = (unsigned int)cputime64_sub(cur_wall_time,
	//		tmp_info->prev_cpu_wall);
	wall_time = (cur_wall_time - tmp_info->prev_cpu_wall);

	tmp_info->prev_cpu_wall = cur_wall_time;

	if (wall_time < idle_time)
		goto no_hotplug;

	load = 100 * (wall_time - idle_time) / wall_time;

	//printk(KERN_INFO "Load %u\n", load);
	
	/* Offline */
	if (((load < trans_load_l_inuse)) &&
	    (num_online_cpus() > 1) && (offline_target > 0)) {
		//printk(KERN_INFO "load: %u cpu %u turning off\n", load, offline_target);
		cpu_down(offline_target);
		hotpluging_rate = CHECK_DELAY;
		 
	/* Online */
	} else if (((load > trans_load_h_inuse)) &&
		(num_present_cpus() > num_online_cpus()) &&
		   (online_target != -1)) {
		//printk(KERN_INFO "load: %u cpu %u turning on\n", load, online_target);
		cpu_up(online_target);
		hotpluging_rate = CHECK_DELAY * 10;
	}
		
no_hotplug:

	mutex_unlock(&hotplug_lock);

	/* If we're being removed, don't queue more work */
	if (likely(die == 0))
		queue_delayed_work_on(0, hotplug_wq, &hotplug_work, hotpluging_rate);

}
开发者ID:rslotte，项目名称:dynamic_hotplug，代码行数:80，代码来源:dyn_hotplug2.c


示例15: __cpu_hotplug

static int __ref __cpu_hotplug(bool out_flag, enum hotplug_cmd cmd)
{
	int i = 0;
	int ret = 0;

	if (exynos_dm_hotplug_disabled())
		return 0;

#if defined(CONFIG_SCHED_HMP)
	if (out_flag) {
		if (do_disable_hotplug)
			goto blk_out;

		if (cmd == CMD_BIG_OUT && !in_low_power_mode) {
			for (i = setup_max_cpus - 1; i >= NR_CA7; i--) {
				if (cpu_online(i)) {
					ret = cpu_down(i);
					if (ret)
						goto blk_out;
				}
			}
		} else {
			for (i = setup_max_cpus - 1; i > 0; i--) {
				if (cpu_online(i)) {
					ret = cpu_down(i);
					if (ret)
						goto blk_out;
				}
			}
		}
	} else {
		if (in_suspend_prepared)
			goto blk_out;

		if (cmd == CMD_BIG_IN) {
			if (in_low_power_mode)
				goto blk_out;

			for (i = NR_CA7; i < setup_max_cpus; i++) {
				if (!cpu_online(i)) {
					ret = cpu_up(i);
					if (ret)
						goto blk_out;
				}
			}
		} else {
			if (big_hotpluged && !do_disable_hotplug) {
				for (i = 1; i < NR_CA7; i++) {
					if (!cpu_online(i)) {
						ret = cpu_up(i);
						if (ret)
							goto blk_out;
					}
				}
			} else {
				for (i = 1; i < setup_max_cpus; i++) {
					if (do_hotplug_out && i >= NR_CA7)
						goto blk_out;

					if (!cpu_online(i)) {
						ret = cpu_up(i);
						if (ret)
							goto blk_out;
					}
				}
			}
		}
	}
#else
	if (out_flag) {
		if (do_disable_hotplug)
			goto blk_out;

		for (i = setup_max_cpus - 1; i > 0; i--) {
			if (cpu_online(i)) {
				ret = cpu_down(i);
				if (ret)
					goto blk_out;
			}
		}
	} else {
		if (in_suspend_prepared)
			goto blk_out;

		for (i = 1; i < setup_max_cpus; i++) {
			if (!cpu_online(i)) {
				ret = cpu_up(i);
				if (ret)
					goto blk_out;
			}
		}
	}
#endif

blk_out:
	return ret;
}
开发者ID:cm-3470，项目名称:android_kernel_samsung_degaslte，代码行数:97，代码来源:dm_cpu_hotplug.c


示例16: tplug_work_fn

static void __cpuinit tplug_work_fn(struct work_struct *work)
{
    int i,j;
    unsigned int load[6], avg_load[6];
    unsigned int avg_cpu_load;

    for(i = 0 ; i < core_limit; i++)
    {
        if(cpu_online(i))
            load[i] = get_curr_load(i);
        else
            load[i] = 0;

        avg_load[i] = ((int) load[i] + (int) last_load[i]) / 2;
        last_load[i] = load[i];
    }

    // First, decide if to get some CPU online
    // CPU 0 is always online

    avg_cpu_load = avg_load[0];

    for(j = suspend_cpu_num ; j < core_limit; j++)
    {
        i = cpuidx[j];
        if (cpu_is_offline(i)) {
            if (avg_cpu_load > load_threshold) {
                if(DEBUG)
                    pr_info("%s : bringing back cpu%d, load avg: %d\n", V4TKPLUG,i,avg_cpu_load);
                last_time[i] = ktime_to_ms(ktime_get());
                cpu_up(i);
                if(DEBUG) print_cpus_all();
                break;
            }
        } else {
            avg_cpu_load = (avg_cpu_load + avg_load[i]*j)/(j+1);
        }
    }

    // Now check if any CPU we can put offline
    avg_cpu_load = avg_load[0];

    for(j = suspend_cpu_num; j < core_limit; j++)
    {
        i = cpuidx[j];
        // if next CPU is already offline or if this is last CPU
        if (cpu_online(i)) {
            if ((j==(core_limit-1) ) || cpu_is_offline(cpuidx[j+1])) {
                if (avg_cpu_load < CPU_LOAD_LOW_THRESHOLD) {
                    now[i] = ktime_to_ms(ktime_get());
                    if((now[i] - last_time[i]) > MIN_CPU_UP_TIME)
                    {
                        if(DEBUG)
                            pr_info("%s : offlining cpu%d, load avg: %d\n", V4TKPLUG,i,avg_cpu_load);
                        cpu_down(i);
                        if(DEBUG) print_cpus_all();
                    }
                    break;
                }
            } else {
                avg_cpu_load = (avg_cpu_load + avg_load[i]*j)/(j+1);
            }
        }
    }

    if(tplug_hp_enabled != 0 && !isSuspended)
        queue_delayed_work_on(0, tplug_wq, &tplug_work,
                              msecs_to_jiffies(sampling_time));
    else {
        if(!isSuspended)
            cpus_online_all();
        else
            v4tkplug_suspend();
    }

}
开发者ID:vadimtk，项目名称:moto-x-kernel，代码行数:76，代码来源:v4tkplug.c


示例17: cpu_subsys_offline

static int cpu_subsys_offline(struct device *dev)
{
	return cpu_down(dev->id);
}
开发者ID:1800alex，项目名称:linux，代码行数:4，代码来源:cpu.c


示例18: intelli_plug_work_fn

static void __cpuinit intelli_plug_work_fn(struct work_struct *work)
{
	unsigned int nr_run_stat;
	unsigned int cpu_count = 0;
	unsigned int nr_cpus = 0;

	int decision = 0;
	int i;

	if (intelli_plug_active == 1) {
		nr_run_stat = calculate_thread_stats();
#ifdef DEBUG_INTELLI_PLUG
		pr_info("nr_run_stat: %u\n", nr_run_stat);
#endif
		cpu_count = nr_run_stat;
		// detect artificial loads or constant loads
		// using msm rqstats
		nr_cpus = num_online_cpus();
		if (!eco_mode_active && (nr_cpus >= 1 && nr_cpus < 4)) {
			decision = mp_decision();
			if (decision) {
				switch (nr_cpus) {
				case 2:
					cpu_count = 3;
#ifdef DEBUG_INTELLI_PLUG
					pr_info("nr_run(2) => %u\n", nr_run_stat);
#endif
					break;
				case 3:
					cpu_count = 4;
#ifdef DEBUG_INTELLI_PLUG
					pr_info("nr_run(3) => %u\n", nr_run_stat);
#endif
					break;
				}
			}
		}
		/* it's busy.. lets help it a bit */
		if (cpu_count > 2) {
			if (busy_persist_count == 0) {
				sampling_time = BUSY_SAMPLING_MS;
				busy_persist_count = BUSY_PERSISTENCE;
			}
		} else {
			if (busy_persist_count > 0)
				busy_persist_count--;
			else
				sampling_time = DEF_SAMPLING_MS;
		}

		if (!suspended) {
			switch (cpu_count) {
			case 1:
				if (persist_count > 0)
					persist_count--;
				if (persist_count == 0) {
					//take down everyone
					for (i = 3; i > 0; i--)
						cpu_down(i);
				}
#ifdef DEBUG_INTELLI_PLUG
				pr_info("case 1: %u\n", persist_count);
#endif
				break;
			case 2:
				persist_count = DUAL_CORE_PERSISTENCE;
				if (!decision)
					persist_count = DUAL_CORE_PERSISTENCE / CPU_DOWN_FACTOR;
				if (nr_cpus < 2) {
					for (i = 1; i < cpu_count; i++)
						cpu_up(i);
				} else {
					for (i = 3; i >  1; i--)
						cpu_down(i);
				}
#ifdef DEBUG_INTELLI_PLUG
				pr_info("case 2: %u\n", persist_count);
#endif
				break;
			case 3:
				persist_count = TRI_CORE_PERSISTENCE;
				if (!decision)
					persist_count = TRI_CORE_PERSISTENCE / CPU_DOWN_FACTOR;
				if (nr_cpus < 3) {
					for (i = 1; i < cpu_count; i++)
						cpu_up(i);
				} else {
					for (i = 3; i > 2; i--)
						cpu_down(i);
				}
#ifdef DEBUG_INTELLI_PLUG
				pr_info("case 3: %u\n", persist_count);
#endif
				break;
			case 4:
				persist_count = QUAD_CORE_PERSISTENCE;
				if (!decision)
					persist_count = QUAD_CORE_PERSISTENCE / CPU_DOWN_FACTOR;
				if (nr_cpus < 4)
					for (i = 1; i < cpu_count; i++)
//.........这里部分代码省略.........
开发者ID:jeehyn，项目名称:NewWorld_kernel_ef52，代码行数:101，代码来源:intelli_plug.c


示例19: tegra_auto_cpuplug_work_func

static void tegra_auto_cpuplug_work_func(struct work_struct *work)
{
	bool up = false;
	unsigned int cpu = nr_cpu_ids;
	unsigned int min_cpus;

	mutex_lock(tegra3_cpu_lock);
	if (hp_state != TEGRA_HP_DISABLED) {
		switch (last_state) {
		case TEGRA_HP_UP:
			cpu = cpumask_next_zero(0, cpu_online_mask);
			if (cpu < nr_cpu_ids) {
				up = true;
				hp_stats_update(cpu, true);
			}
			break;
		case TEGRA_HP_DOWN:
			cpu = tegra_get_slowest_cpu_n();
			if (cpu < nr_cpu_ids) {
				min_cpus = pm_qos_request(PM_QOS_MIN_ONLINE_CPUS);
				if (min_cpus < num_online_cpus()) {
					up = false;
					hp_stats_update(cpu, false);
				} else {
					cpu = nr_cpu_ids;
				}
			} else if (!is_lp_cluster() && !no_lp) {

				/* For some reason this sometimes results in a null
				   pointer dereference. Set the clocks again if this
				   case occurs.
				   start show-p1984, 2012.05.13
				 */
				if (!cpu_clk) {
					printk(KERN_INFO "[cpu-tegra3]: re setting cpu_clk");
					cpu_clk = clk_get_sys(NULL, "cpu");
				}
				if (!cpu_lp_clk) {
					printk(KERN_INFO "[cpu-tegra3]: re setting cpu_lp_clk");
					cpu_lp_clk = clk_get_sys(NULL, "cpu_lp");
				}
				if (IS_ERR(cpu_clk) || IS_ERR(cpu_lp_clk)) {
					printk(KERN_INFO "[cpu-tegra3]: Error, cpu_clk/cpu_lp_lck not set");
					break;
				}
				/* end show-p1984, 2012.05.13 */

				if (!clk_set_parent(cpu_clk, cpu_lp_clk)) {
					CPU_DEBUG_PRINTK(CPU_DEBUG_HOTPLUG, " ENTER LPCPU");
					hp_stats_update(CONFIG_NR_CPUS, true);
					hp_stats_update(0, false);
					/* catch-up with governor target speed */
					tegra_cpu_set_speed_cap(NULL);
				} else
					pr_err(CPU_HOTPLUG_TAG" clk_set_parent fail\n");
			}
			break;
		}
	}
	mutex_unlock(tegra3_cpu_lock);

	if (system_state > SYSTEM_RUNNING) {
		pr_info(CPU_HOTPLUG_TAG" SYSTEM is not running\n");
	} else if (cpu < nr_cpu_ids) {
		if (up) {
			updateCurrentCPUTotalActiveTime();
			cpu_up(cpu);
			pr_info(CPU_HOTPLUG_TAG" TURN ON CPU %d, online CPU 0-3=[%d%d%d%d]\n",
					cpu, cpu_online(0), cpu_online(1), cpu_online(2), cpu_online(3));
		} else {
			updateCurrentCPUTotalActiveTime();
			cpu_down(cpu);
			pr_info(CPU_HOTPLUG_TAG" TURN OFF CPU %d, online CPU 0-3=[%d%d%d%d]\n",
					cpu, cpu_online(0), cpu_online(1), cpu_online(2), cpu_online(3));
		}
	}

	mutex_lock(tegra3_cpu_lock);
	is_plugging = false;
	mutex_unlock(tegra3_cpu_lock);
}
开发者ID:n3ocort3x，项目名称:bricked-endeavoru，代码行数:81，代码来源:cpu-tegra3.c


示例20: __cpu_hotplug

static int __ref __cpu_hotplug(bool out_flag, enum hotplug_cmd cmd)
{
	int i = 0;
	int ret = 0;
#if defined(CONFIG_SCHED_HMP)
	int hotplug_out_limit = 0;
#endif

	if (exynos_dm_hotplug_disabled())
		return 0;

#if defined(CONFIG_SCHED_HMP)
	if (out_flag) {
		if (do_disable_hotplug)
			goto blk_out;

		if (cmd == CMD_SLEEP_PREPARE) {
			for (i = setup_max_cpus - 1; i >= NR_CLUST0_CPUS; i--) {
                                if (cpu_online(i)) {
                                        ret = cpu_down(i);
                                        if (ret)
                                                goto blk_out;
                                }
			}
			for (i = 1; i < nr_sleep_prepare_cpus; i++) {
				if (!cpu_online(i)) {
					ret = cpu_up(i);
					if (ret)
						goto blk_out;
				}
			}
		}
		else if (cmd == CMD_CLUST1_OUT && !in_low_power_mode) {
			for (i = setup_max_cpus - 1; i >= NR_CLUST0_CPUS; i--) {
				if (cpu_online(i)) {
					ret = cpu_down(i);
					if (ret)
						goto blk_out;
				}
			}
		} else {
			if (cmd == CMD_CLUST0_ONE_OUT) {
				if (!in_low_power_mode)
					goto blk_out;

				for (i = NR_CLUST0_CPUS - 2; i > 0; i--) {
					if (cpu_online(i)) {
						ret = cpu_down(i);
						if (ret)
							goto blk_out;
					}
				}
			} else {
				if (cluster0_hotplug_in)
					hotplug_out_limit = NR_CLUST0_CPUS - 2;

				for (i = setup_max_cpus - 1; i > hotplug_out_limit; i--) {
					if (cpu_online(i)) {
						ret = cpu_down(i);
						if (ret)
							goto blk_out;
					}
				}
			}
		}
	} else {
		if (in_suspend_prepared)
			goto blk_out;

		if (cmd == CMD_CLUST1_IN) {
			if (in_low_power_mode)
				goto blk_out;

			for (i = NR_CLUST0_CPUS; i < setup_max_cpus; i++) {
				if (!cpu_online(i)) {
					ret = cpu_up(i);
					if (ret)
						goto blk_out;
				}
			}
		} else {
			if (cmd == CMD_CLUST0_ONE_IN) {
				for (i = 1; i < NR_CLUST0_CPUS - 1; i++) {
					if (!cpu_online(i)) {
						ret = cpu_up(i);
						if (ret)
							goto blk_out;
					}
				}
			} else if ((cluster1_hotplugged && !do_disable_hotplug) ||
				(cmd == CMD_CLUST0_IN)) {
				for (i = 1; i < NR_CLUST0_CPUS; i++) {
					if (!cpu_online(i)) {
						ret = cpu_up(i);
						if (ret)
							goto blk_out;
					}
				}
			} else {
				if (lcd_is_on) {
//.........这里部分代码省略.........
开发者ID:gundal，项目名称:nobleltehk，代码行数:101，代码来源:dm_cpu_hotplug.c



注：本文中的cpu_down函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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