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#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 <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
*/
struct cpu_usage_stat {
cputime64_t user;
cputime64_t nice;
cputime64_t system;
cputime64_t softirq;
cputime64_t irq;
cputime64_t idle;
cputime64_t iowait;
cputime64_t steal;
cputime64_t guest;
};
struct kernel_stat {
struct cpu_usage_stat cpustat;
unsigned int irqs[NR_IRQS];
};
DECLARE_PER_CPU(struct kernel_stat, kstat);
#define kstat_cpu(cpu) per_cpu(kstat, cpu)
/* Must have preemption disabled for this to be meaningful. */
#define kstat_this_cpu __get_cpu_var(kstat)
extern unsigned long long nr_context_switches(void);
struct irq_desc;
static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
struct irq_desc *desc)
{
kstat_this_cpu.irqs[irq]++;
}
static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
{
return kstat_cpu(cpu).irqs[irq];
}
/*
* Number of interrupts per specific IRQ source, since bootup
*/
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;
}
/*
* Lock/unlock the current runqueue - to extract task statistics:
*/
extern void curr_rq_lock_irq_save(unsigned long *flags);
extern void curr_rq_unlock_irq_restore(unsigned long *flags);
extern unsigned long long __task_delta_exec(struct task_struct *tsk, int update);
extern unsigned long long task_delta_exec(struct task_struct *);
extern void account_user_time(struct task_struct *, cputime_t);
extern void account_user_time_scaled(struct task_struct *, cputime_t);
extern void account_system_time(struct task_struct *, int, cputime_t);
extern void account_system_time_scaled(struct task_struct *, cputime_t);
extern void account_steal_time(struct task_struct *, cputime_t);
#endif /* _LINUX_KERNEL_STAT_H */
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