Example #1
0
void
thread_read_times(
	thread_t		thread,
	time_value_t	*user_time,
	time_value_t	*system_time)
{
	clock_sec_t		secs;
	clock_usec_t	usecs;
	uint64_t		tval_user, tval_system;

	tval_user = timer_grab(&thread->user_timer);
	tval_system = timer_grab(&thread->system_timer);

	if (thread->precise_user_kernel_time) {
		absolutetime_to_microtime(tval_user, &secs, &usecs);
		user_time->seconds = (typeof(user_time->seconds))secs;
		user_time->microseconds = usecs;
		
		absolutetime_to_microtime(tval_system, &secs, &usecs);
		system_time->seconds = (typeof(system_time->seconds))secs;
		system_time->microseconds = usecs;
	} else {
		/* system_timer may represent either sys or user */
		tval_user += tval_system;
		absolutetime_to_microtime(tval_user, &secs, &usecs);
		user_time->seconds = (typeof(user_time->seconds))secs;
		user_time->microseconds = usecs;

		system_time->seconds = 0;
		system_time->microseconds = 0;
	}
}
Example #2
0
/*
 *	thread_read_times reads the user and system times from a thread.
 *	Time accumulated since last timestamp is not included.  Should
 *	be called at splsched() to avoid having user and system times
 *	be out of step.  Doesn't care if caller locked thread.
 *
 *      Needs to be kept coherent with thread_read_times ahead.
 */
void
thread_read_times(
	thread_t 	thread,
	time_value_t	*user_time_p,
	time_value_t	*system_time_p)
{
	timer_save_data_t	temp;
	register timer_t	timer;

	timer = &thread->user_timer;
	timer_grab(timer, &temp);

#ifdef	TIMER_ADJUST
	TIMER_ADJUST(&temp);
#endif	/* TIMER_ADJUST */
	user_time_p->seconds = temp.high + temp.low/1000000;
	user_time_p->microseconds = temp.low % 1000000;

	timer = &thread->system_timer;
	timer_grab(timer, &temp);

#ifdef	TIMER_ADJUST
	TIMER_ADJUST(&temp);
#endif	/* TIMER_ADJUST */
	system_time_p->seconds = temp.high + temp.low/1000000;
	system_time_p->microseconds = temp.low % 1000000;
}
Example #3
0
/*
 *	thread_terminate_daemon:
 *
 *	Perform final clean up for terminating threads.
 */
static void
thread_terminate_daemon(void)
{
	thread_t			thread;
	task_t				task;

	(void)splsched();
	simple_lock(&thread_terminate_lock);

	while ((thread = (thread_t)dequeue_head(&thread_terminate_queue)) != THREAD_NULL) {
		simple_unlock(&thread_terminate_lock);
		(void)spllo();

		task = thread->task;

		task_lock(task);
		task->total_user_time += timer_grab(&thread->user_timer);
		task->total_system_time += timer_grab(&thread->system_timer);

		task->c_switch += thread->c_switch;
		task->p_switch += thread->p_switch;
		task->ps_switch += thread->ps_switch;

		queue_remove(&task->threads, thread, thread_t, task_threads);
		task->thread_count--;

		/* 
		 * If the task is being halted, and there is only one thread
		 * left in the task after this one, then wakeup that thread.
		 */
		if (task->thread_count == 1 && task->halting)
			thread_wakeup((event_t)&task->halting);

		task_unlock(task);

		lck_mtx_lock(&tasks_threads_lock);
		queue_remove(&threads, thread, thread_t, threads);
		threads_count--;
		lck_mtx_unlock(&tasks_threads_lock);

		thread_deallocate(thread);

		(void)splsched();
		simple_lock(&thread_terminate_lock);
	}

	assert_wait((event_t)&thread_terminate_queue, THREAD_UNINT);
	simple_unlock(&thread_terminate_lock);
	/* splsched */

	thread_block((thread_continue_t)thread_terminate_daemon);
	/*NOTREACHED*/
}
Example #4
0
int64_t dtrace_calc_thread_recent_vtime(thread_t thread)
{
	if (thread != THREAD_NULL) {
		processor_t             processor = current_processor();
		uint64_t 				abstime = mach_absolute_time();
		timer_t					timer;

		timer = PROCESSOR_DATA(processor, thread_timer);

		return timer_grab(&(thread->system_timer)) + timer_grab(&(thread->user_timer)) +
				(abstime - timer->tstamp); /* XXX need interrupts off to prevent missed time? */
	} else
		return 0;
}
Example #5
0
void
thread_read_times(
	thread_t		thread,
	time_value_t	*user_time,
	time_value_t	*system_time)
{
	absolutetime_to_microtime(timer_grab(&thread->user_timer),
				  (unsigned *)&user_time->seconds,
				  (unsigned *)&user_time->microseconds);

	absolutetime_to_microtime(timer_grab(&thread->system_timer),
				  (unsigned *)&system_time->seconds,
				  (unsigned *)&system_time->microseconds);
}
Example #6
0
void
thread_read_times(
	thread_t		thread,
	time_value_t	*user_time,
	time_value_t	*system_time)
{
	clock_sec_t		secs;
	clock_usec_t	usecs;

	absolutetime_to_microtime(timer_grab(&thread->user_timer), &secs, &usecs);
	user_time->seconds = (typeof(user_time->seconds))secs;
	user_time->microseconds = usecs;

	absolutetime_to_microtime(timer_grab(&thread->system_timer), &secs, &usecs);
	system_time->seconds = (typeof(system_time->seconds))secs;
	system_time->microseconds = usecs;
}
Example #7
0
/*
 *	thread_terminate_daemon:
 *
 *	Perform final clean up for terminating threads.
 */
static void
thread_terminate_daemon(void)
{
	thread_t			thread;
	task_t				task;

	(void)splsched();
	simple_lock(&thread_terminate_lock);

	while ((thread = (thread_t)dequeue_head(&thread_terminate_queue)) != THREAD_NULL) {
		simple_unlock(&thread_terminate_lock);
		(void)spllo();

		task = thread->task;

		task_lock(task);
		task->total_user_time += timer_grab(&thread->user_timer);
		task->total_system_time += timer_grab(&thread->system_timer);

		task->c_switch += thread->c_switch;
		task->p_switch += thread->p_switch;
		task->ps_switch += thread->ps_switch;

		queue_remove(&task->threads, thread, thread_t, task_threads);
		task->thread_count--;
		task_unlock(task);

		mutex_lock(&tasks_threads_lock);
		queue_remove(&threads, thread, thread_t, threads);
		threads_count--;
		mutex_unlock(&tasks_threads_lock);

		thread_deallocate(thread);

		(void)splsched();
		simple_lock(&thread_terminate_lock);
	}

	assert_wait((event_t)&thread_terminate_queue, THREAD_UNINT);
	simple_unlock(&thread_terminate_lock);
	/* splsched */

	thread_block((thread_continue_t)thread_terminate_daemon);
	/*NOTREACHED*/
}
Example #8
0
unsigned
timer_delta(
	register timer_t timer,
	timer_save_t	save)
{
	timer_save_data_t	new_save;
	register unsigned	result;

	timer_grab(timer,&new_save);
	result = (new_save.high - save->high) * TIMER_HIGH_UNIT +
		new_save.low - save->low;
	save->high = new_save.high;
	save->low = new_save.low;
	return(result);
}
Example #9
0
void
timer_read(
	timer_t timer,
	register time_value_t *tv)
{
	timer_save_data_t	temp;

	timer_grab(timer,&temp);
	/*
	 *	Normalize the result
	 */
#ifdef	TIMER_ADJUST
	TIMER_ADJUST(&temp);
#endif	/* TIMER_ADJUST */
	tv->seconds = temp.high + temp.low/1000000;
	tv->microseconds = temp.low%1000000;
}
Example #10
0
/*
 *	thread_terminate_daemon:
 *
 *	Perform final clean up for terminating threads.
 */
static void
thread_terminate_daemon(void)
{
	thread_t	self, thread;
	task_t		task;

	self = current_thread();
	self->options |= TH_OPT_SYSTEM_CRITICAL;

	(void)splsched();
	simple_lock(&thread_terminate_lock);

	while ((thread = (thread_t)dequeue_head(&thread_terminate_queue)) != THREAD_NULL) {
		simple_unlock(&thread_terminate_lock);
		(void)spllo();

		task = thread->task;

		task_lock(task);
		task->total_user_time += timer_grab(&thread->user_timer);
		if (thread->precise_user_kernel_time) {
			task->total_system_time += timer_grab(&thread->system_timer);
		} else {
			task->total_user_time += timer_grab(&thread->system_timer);
		}

		task->c_switch += thread->c_switch;
		task->p_switch += thread->p_switch;
		task->ps_switch += thread->ps_switch;

		task->syscalls_unix += thread->syscalls_unix;
		task->syscalls_mach += thread->syscalls_mach;

		task->task_timer_wakeups_bin_1 += thread->thread_timer_wakeups_bin_1;
		task->task_timer_wakeups_bin_2 += thread->thread_timer_wakeups_bin_2;
		queue_remove(&task->threads, thread, thread_t, task_threads);
		task->thread_count--;

		/* 
		 * If the task is being halted, and there is only one thread
		 * left in the task after this one, then wakeup that thread.
		 */
		if (task->thread_count == 1 && task->halting)
			thread_wakeup((event_t)&task->halting);

		task_unlock(task);

		lck_mtx_lock(&tasks_threads_lock);
		queue_remove(&threads, thread, thread_t, threads);
		threads_count--;
		lck_mtx_unlock(&tasks_threads_lock);

		thread_deallocate(thread);

		(void)splsched();
		simple_lock(&thread_terminate_lock);
	}

	assert_wait((event_t)&thread_terminate_queue, THREAD_UNINT);
	simple_unlock(&thread_terminate_lock);
	/* splsched */

	self->options &= ~TH_OPT_SYSTEM_CRITICAL;
	thread_block((thread_continue_t)thread_terminate_daemon);
	/*NOTREACHED*/
}
Example #11
0
kern_return_t
processor_info(
	register processor_t	processor,
	processor_flavor_t		flavor,
	host_t					*host,
	processor_info_t		info,
	mach_msg_type_number_t	*count)
{
	register int	cpu_id, state;
	kern_return_t	result;

	if (processor == PROCESSOR_NULL)
		return (KERN_INVALID_ARGUMENT);

	cpu_id = processor->cpu_id;

	switch (flavor) {

	case PROCESSOR_BASIC_INFO:
	{
		register processor_basic_info_t		basic_info;

		if (*count < PROCESSOR_BASIC_INFO_COUNT)
			return (KERN_FAILURE);

		basic_info = (processor_basic_info_t) info;
		basic_info->cpu_type = slot_type(cpu_id);
		basic_info->cpu_subtype = slot_subtype(cpu_id);
		state = processor->state;
		if (state == PROCESSOR_OFF_LINE)
			basic_info->running = FALSE;
		else
			basic_info->running = TRUE;
		basic_info->slot_num = cpu_id;
		if (processor == master_processor) 
			basic_info->is_master = TRUE;
		else
			basic_info->is_master = FALSE;

		*count = PROCESSOR_BASIC_INFO_COUNT;
		*host = &realhost;

	    return (KERN_SUCCESS);
	}

	case PROCESSOR_CPU_LOAD_INFO:
	{
		register processor_cpu_load_info_t	cpu_load_info;

	    if (*count < PROCESSOR_CPU_LOAD_INFO_COUNT)
			return (KERN_FAILURE);

	    cpu_load_info = (processor_cpu_load_info_t) info;
		cpu_load_info->cpu_ticks[CPU_STATE_USER] =
							(uint32_t)(timer_grab(&PROCESSOR_DATA(processor, user_state)) / hz_tick_interval);
		cpu_load_info->cpu_ticks[CPU_STATE_SYSTEM] =
							(uint32_t)(timer_grab(&PROCESSOR_DATA(processor, system_state)) / hz_tick_interval);
		cpu_load_info->cpu_ticks[CPU_STATE_IDLE] =
							(uint32_t)(timer_grab(&PROCESSOR_DATA(processor, idle_state)) / hz_tick_interval);
		cpu_load_info->cpu_ticks[CPU_STATE_NICE] = 0;

	    *count = PROCESSOR_CPU_LOAD_INFO_COUNT;
	    *host = &realhost;

	    return (KERN_SUCCESS);
	}

	default:
	    result = cpu_info(flavor, cpu_id, info, count);
	    if (result == KERN_SUCCESS)
			*host = &realhost;		   

	    return (result);
	}
}
Example #12
0
File: host.c Project: DJHartley/xnu
kern_return_t
host_statistics(
	host_t					host,
	host_flavor_t			flavor,
	host_info_t				info,
	mach_msg_type_number_t	*count)
{
	uint32_t	i;

	if (host == HOST_NULL)
		return (KERN_INVALID_HOST);
	
	switch(flavor) {

	case HOST_LOAD_INFO:
	{
		host_load_info_t	load_info;

		if (*count < HOST_LOAD_INFO_COUNT)
			return (KERN_FAILURE);

		load_info = (host_load_info_t) info;

		bcopy((char *) avenrun,
			  (char *) load_info->avenrun, sizeof avenrun);
		bcopy((char *) mach_factor,
			  (char *) load_info->mach_factor, sizeof mach_factor);

		*count = HOST_LOAD_INFO_COUNT;
		return (KERN_SUCCESS);
	}

	case HOST_VM_INFO:
	{
		register processor_t		processor;
		register vm_statistics64_t	stat;
		vm_statistics64_data_t		host_vm_stat;
		vm_statistics_t			stat32;
		mach_msg_type_number_t		original_count;
                
		if (*count < HOST_VM_INFO_REV0_COUNT)
			return (KERN_FAILURE);

		processor = processor_list;
		stat = &PROCESSOR_DATA(processor, vm_stat);
		host_vm_stat = *stat;

		if (processor_count > 1) {
			simple_lock(&processor_list_lock);

			while ((processor = processor->processor_list) != NULL) {
				stat = &PROCESSOR_DATA(processor, vm_stat);

				host_vm_stat.zero_fill_count +=	stat->zero_fill_count;
				host_vm_stat.reactivations += stat->reactivations;
				host_vm_stat.pageins += stat->pageins;
				host_vm_stat.pageouts += stat->pageouts;
				host_vm_stat.faults += stat->faults;
				host_vm_stat.cow_faults += stat->cow_faults;
				host_vm_stat.lookups += stat->lookups;
				host_vm_stat.hits += stat->hits;
			}

			simple_unlock(&processor_list_lock);
		}

		stat32 = (vm_statistics_t) info;

		stat32->free_count = VM_STATISTICS_TRUNCATE_TO_32_BIT(vm_page_free_count + vm_page_speculative_count);
		stat32->active_count = VM_STATISTICS_TRUNCATE_TO_32_BIT(vm_page_active_count);
		
		if (vm_page_local_q) {
			for (i = 0; i < vm_page_local_q_count; i++) {
				struct vpl	*lq;

				lq = &vm_page_local_q[i].vpl_un.vpl;

				stat32->active_count += VM_STATISTICS_TRUNCATE_TO_32_BIT(lq->vpl_count);
			}
		}
		stat32->inactive_count = VM_STATISTICS_TRUNCATE_TO_32_BIT(vm_page_inactive_count);
#if CONFIG_EMBEDDED
		stat32->wire_count = VM_STATISTICS_TRUNCATE_TO_32_BIT(vm_page_wire_count);
#else
		stat32->wire_count = VM_STATISTICS_TRUNCATE_TO_32_BIT(vm_page_wire_count + vm_page_throttled_count + vm_lopage_free_count);
#endif
		stat32->zero_fill_count = VM_STATISTICS_TRUNCATE_TO_32_BIT(host_vm_stat.zero_fill_count);
		stat32->reactivations = VM_STATISTICS_TRUNCATE_TO_32_BIT(host_vm_stat.reactivations);
		stat32->pageins = VM_STATISTICS_TRUNCATE_TO_32_BIT(host_vm_stat.pageins);
		stat32->pageouts = VM_STATISTICS_TRUNCATE_TO_32_BIT(host_vm_stat.pageouts);
		stat32->faults = VM_STATISTICS_TRUNCATE_TO_32_BIT(host_vm_stat.faults);
		stat32->cow_faults = VM_STATISTICS_TRUNCATE_TO_32_BIT(host_vm_stat.cow_faults);
		stat32->lookups = VM_STATISTICS_TRUNCATE_TO_32_BIT(host_vm_stat.lookups);
		stat32->hits = VM_STATISTICS_TRUNCATE_TO_32_BIT(host_vm_stat.hits);

		/*
		 * Fill in extra info added in later revisions of the
		 * vm_statistics data structure.  Fill in only what can fit
		 * in the data structure the caller gave us !
		 */
		original_count = *count;
		*count = HOST_VM_INFO_REV0_COUNT; /* rev0 already filled in */
		if (original_count >= HOST_VM_INFO_REV1_COUNT) {
			/* rev1 added "purgeable" info */
			stat32->purgeable_count = VM_STATISTICS_TRUNCATE_TO_32_BIT(vm_page_purgeable_count);
			stat32->purges = VM_STATISTICS_TRUNCATE_TO_32_BIT(vm_page_purged_count);
			*count = HOST_VM_INFO_REV1_COUNT;
		}

		if (original_count >= HOST_VM_INFO_REV2_COUNT) {
			/* rev2 added "speculative" info */
			stat32->speculative_count = VM_STATISTICS_TRUNCATE_TO_32_BIT(vm_page_speculative_count);
			*count = HOST_VM_INFO_REV2_COUNT;
		}

		/* rev3 changed some of the fields to be 64-bit*/

		return (KERN_SUCCESS);
	}
                
	case HOST_CPU_LOAD_INFO:
	{
		register processor_t	processor;
		host_cpu_load_info_t	cpu_load_info;

		if (*count < HOST_CPU_LOAD_INFO_COUNT)
			return (KERN_FAILURE);

#define GET_TICKS_VALUE(processor, state, timer)			 \
MACRO_BEGIN								 \
	cpu_load_info->cpu_ticks[(state)] +=				 \
		(uint32_t)(timer_grab(&PROCESSOR_DATA(processor, timer)) \
				/ hz_tick_interval);			 \
MACRO_END

		cpu_load_info = (host_cpu_load_info_t)info;
		cpu_load_info->cpu_ticks[CPU_STATE_USER] = 0;
		cpu_load_info->cpu_ticks[CPU_STATE_SYSTEM] = 0;
		cpu_load_info->cpu_ticks[CPU_STATE_IDLE] = 0;
		cpu_load_info->cpu_ticks[CPU_STATE_NICE] = 0;

		simple_lock(&processor_list_lock);

		for (processor = processor_list; processor != NULL; processor = processor->processor_list) {
			timer_data_t	idle_temp;
			timer_t		idle_state;

			GET_TICKS_VALUE(processor, CPU_STATE_USER, user_state);
			if (precise_user_kernel_time) {
				GET_TICKS_VALUE(processor, CPU_STATE_SYSTEM, system_state);
			} else {
				/* system_state may represent either sys or user */
				GET_TICKS_VALUE(processor, CPU_STATE_USER, system_state);
			}

			idle_state = &PROCESSOR_DATA(processor, idle_state);
			idle_temp = *idle_state;

			if (PROCESSOR_DATA(processor, current_state) != idle_state ||
			    timer_grab(&idle_temp) != timer_grab(idle_state))
				GET_TICKS_VALUE(processor, CPU_STATE_IDLE, idle_state);
			else {
				timer_advance(&idle_temp, mach_absolute_time() - idle_temp.tstamp);

				cpu_load_info->cpu_ticks[CPU_STATE_IDLE] +=
					(uint32_t)(timer_grab(&idle_temp) / hz_tick_interval);
			}
		}
		simple_unlock(&processor_list_lock);

		*count = HOST_CPU_LOAD_INFO_COUNT;

		return (KERN_SUCCESS);
	}

	case HOST_EXPIRED_TASK_INFO:
	{
		if (*count < TASK_POWER_INFO_COUNT) {
			return (KERN_FAILURE);
		}

		task_power_info_t tinfo = (task_power_info_t)info;

		tinfo->task_interrupt_wakeups = dead_task_statistics.task_interrupt_wakeups;
		tinfo->task_platform_idle_wakeups = dead_task_statistics.task_platform_idle_wakeups;

		tinfo->task_timer_wakeups_bin_1 = dead_task_statistics.task_timer_wakeups_bin_1;
		tinfo->task_timer_wakeups_bin_2 = dead_task_statistics.task_timer_wakeups_bin_2;

		tinfo->total_user = dead_task_statistics.total_user_time;
		tinfo->total_system = dead_task_statistics.total_system_time;

		return (KERN_SUCCESS);
	}

	default:
		return (KERN_INVALID_ARGUMENT);
	}
}
Example #13
0
kern_return_t
processor_info(
	processor_t	processor,
	processor_flavor_t		flavor,
	host_t					*host,
	processor_info_t		info,
	mach_msg_type_number_t	*count)
{
	int	cpu_id, state;
	kern_return_t	result;

	if (processor == PROCESSOR_NULL)
		return (KERN_INVALID_ARGUMENT);

	cpu_id = processor->cpu_id;

	switch (flavor) {

	case PROCESSOR_BASIC_INFO:
	{
		processor_basic_info_t		basic_info;

		if (*count < PROCESSOR_BASIC_INFO_COUNT)
			return (KERN_FAILURE);

		basic_info = (processor_basic_info_t) info;
		basic_info->cpu_type = slot_type(cpu_id);
		basic_info->cpu_subtype = slot_subtype(cpu_id);
		state = processor->state;
		if (state == PROCESSOR_OFF_LINE)
			basic_info->running = FALSE;
		else
			basic_info->running = TRUE;
		basic_info->slot_num = cpu_id;
		if (processor == master_processor) 
			basic_info->is_master = TRUE;
		else
			basic_info->is_master = FALSE;

		*count = PROCESSOR_BASIC_INFO_COUNT;
		*host = &realhost;

	    return (KERN_SUCCESS);
	}

	case PROCESSOR_CPU_LOAD_INFO:
	{
		processor_cpu_load_info_t	cpu_load_info;
		timer_t		idle_state;
		uint64_t	idle_time_snapshot1, idle_time_snapshot2;
		uint64_t	idle_time_tstamp1, idle_time_tstamp2;

		/*
		 * We capture the accumulated idle time twice over
		 * the course of this function, as well as the timestamps
		 * when each were last updated. Since these are
		 * all done using non-atomic racy mechanisms, the
		 * most we can infer is whether values are stable.
		 * timer_grab() is the only function that can be
		 * used reliably on another processor's per-processor
		 * data.
		 */

		if (*count < PROCESSOR_CPU_LOAD_INFO_COUNT)
			return (KERN_FAILURE);

		cpu_load_info = (processor_cpu_load_info_t) info;
		if (precise_user_kernel_time) {
			cpu_load_info->cpu_ticks[CPU_STATE_USER] =
							(uint32_t)(timer_grab(&PROCESSOR_DATA(processor, user_state)) / hz_tick_interval);
			cpu_load_info->cpu_ticks[CPU_STATE_SYSTEM] =
							(uint32_t)(timer_grab(&PROCESSOR_DATA(processor, system_state)) / hz_tick_interval);
		} else {
			uint64_t tval = timer_grab(&PROCESSOR_DATA(processor, user_state)) +
				timer_grab(&PROCESSOR_DATA(processor, system_state));

			cpu_load_info->cpu_ticks[CPU_STATE_USER] = (uint32_t)(tval / hz_tick_interval);
			cpu_load_info->cpu_ticks[CPU_STATE_SYSTEM] = 0;
		}

		idle_state = &PROCESSOR_DATA(processor, idle_state);
		idle_time_snapshot1 = timer_grab(idle_state);
		idle_time_tstamp1 = idle_state->tstamp;

		/*
		 * Idle processors are not continually updating their
		 * per-processor idle timer, so it may be extremely
		 * out of date, resulting in an over-representation
		 * of non-idle time between two measurement
		 * intervals by e.g. top(1). If we are non-idle, or
		 * have evidence that the timer is being updated
		 * concurrently, we consider its value up-to-date.
		 */
		if (PROCESSOR_DATA(processor, current_state) != idle_state) {
			cpu_load_info->cpu_ticks[CPU_STATE_IDLE] =
							(uint32_t)(idle_time_snapshot1 / hz_tick_interval);
		} else if ((idle_time_snapshot1 != (idle_time_snapshot2 = timer_grab(idle_state))) ||
				   (idle_time_tstamp1 != (idle_time_tstamp2 = idle_state->tstamp))){
			/* Idle timer is being updated concurrently, second stamp is good enough */
			cpu_load_info->cpu_ticks[CPU_STATE_IDLE] =
							(uint32_t)(idle_time_snapshot2 / hz_tick_interval);
		} else {
			/*
			 * Idle timer may be very stale. Fortunately we have established
			 * that idle_time_snapshot1 and idle_time_tstamp1 are unchanging
			 */
			idle_time_snapshot1 += mach_absolute_time() - idle_time_tstamp1;
				
			cpu_load_info->cpu_ticks[CPU_STATE_IDLE] =
				(uint32_t)(idle_time_snapshot1 / hz_tick_interval);
		}

		cpu_load_info->cpu_ticks[CPU_STATE_NICE] = 0;

	    *count = PROCESSOR_CPU_LOAD_INFO_COUNT;
	    *host = &realhost;

	    return (KERN_SUCCESS);
	}

	default:
	    result = cpu_info(flavor, cpu_id, info, count);
	    if (result == KERN_SUCCESS)
			*host = &realhost;		   

	    return (result);
	}
}