aboutsummaryrefslogblamecommitdiffstats
path: root/include/linux/kernel_stat.h
blob: 2fbd9053c2df6477a425567c49014ea3328f9038 (plain) (tree)
1
2
3
4
5
6
7
8
9


                            


                          
                          
                            
                        
                    







                                                            















                              


                    
                               

                                  
                               
                                           


                                           
                                                       
 
                                                              



                                                          


                                                    
                               
 
                
 


                                                                  

                                        
 
 



                                                                    
     
                      
                                                              





                                                         
 
      
 

                                                                 
                                            






                                                                        


                                                             
                               
                                                       
 

                             
 
                                  
                                                


                   


                                                 
 






                                                               



                                                                 
                                                                
 

                                                                                 





                                                                 

                                 
#ifndef _LINUX_KERNEL_STAT_H
#define _LINUX_KERNEL_STAT_H

#include <linux/smp.h>
#include <linux/threads.h>
#include <linux/percpu.h>
#include <linux/cpumask.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <asm/irq.h>
#include <asm/cputime.h>

/*
 * 'kernel_stat.h' contains the definitions needed for doing
 * some kernel statistics (CPU usage, context switches ...),
 * used by rstatd/perfmeter
 */

enum cpu_usage_stat {
	CPUTIME_USER,
	CPUTIME_NICE,
	CPUTIME_SYSTEM,
	CPUTIME_SOFTIRQ,
	CPUTIME_IRQ,
	CPUTIME_IDLE,
	CPUTIME_IOWAIT,
	CPUTIME_STEAL,
	CPUTIME_GUEST,
	CPUTIME_GUEST_NICE,
	NR_STATS,
};

struct kernel_cpustat {
	u64 cpustat[NR_STATS];
};

struct kernel_stat {
#ifndef CONFIG_GENERIC_HARDIRQS
       unsigned int irqs[NR_IRQS];
#endif
	unsigned long irqs_sum;
	unsigned int softirqs[NR_SOFTIRQS];
};

DECLARE_PER_CPU(struct kernel_stat, kstat);
DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);

/* Must have preemption disabled for this to be meaningful. */
#define kstat_this_cpu (&__get_cpu_var(kstat))
#define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
#define kstat_cpu(cpu) per_cpu(kstat, cpu)
#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)

extern unsigned long long nr_context_switches(void);

#ifndef CONFIG_GENERIC_HARDIRQS

struct irq_desc;

static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
					    struct irq_desc *desc)
{
	__this_cpu_inc(kstat.irqs[irq]);
	__this_cpu_inc(kstat.irqs_sum);
}

static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
{
       return kstat_cpu(cpu).irqs[irq];
}
#else
#include <linux/irq.h>
extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);

#define kstat_incr_irqs_this_cpu(irqno, DESC)		\
do {							\
	__this_cpu_inc(*(DESC)->kstat_irqs);		\
	__this_cpu_inc(kstat.irqs_sum);			\
} while (0)

#endif

static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
{
	__this_cpu_inc(kstat.softirqs[irq]);
}

static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
{
       return kstat_cpu(cpu).softirqs[irq];
}

/*
 * Number of interrupts per specific IRQ source, since bootup
 */
#ifndef CONFIG_GENERIC_HARDIRQS
static inline unsigned int kstat_irqs(unsigned int irq)
{
	unsigned int sum = 0;
	int cpu;

	for_each_possible_cpu(cpu)
		sum += kstat_irqs_cpu(irq, cpu);

	return sum;
}
#else
extern unsigned int kstat_irqs(unsigned int irq);
#endif

/*
 * Number of interrupts per cpu, since bootup
 */
static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
{
	return kstat_cpu(cpu).irqs_sum;
}

/*
 * Lock/unlock the current runqueue - to extract task statistics:
 */
extern unsigned long long task_delta_exec(struct task_struct *);

extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
extern void account_steal_time(cputime_t);
extern void account_idle_time(cputime_t);

extern void account_process_tick(struct task_struct *, int user);
extern void account_steal_ticks(unsigned long ticks);
extern void account_idle_ticks(unsigned long ticks);

#endif /* _LINUX_KERNEL_STAT_H */