1 #ifndef _LINUX_KERNEL_STAT_H
2 #define _LINUX_KERNEL_STAT_H
5 #include <linux/threads.h>
6 #include <linux/percpu.h>
7 #include <linux/cpumask.h>
9 #include <asm/cputime.h>
12 * 'kernel_stat.h' contains the definitions needed for doing
13 * some kernel statistics (CPU usage, context switches ...),
14 * used by rstatd/perfmeter
17 struct cpu_usage_stat {
30 struct cpu_usage_stat cpustat;
31 unsigned int irqs[NR_IRQS];
34 DECLARE_PER_CPU(struct kernel_stat, kstat);
36 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
37 /* Must have preemption disabled for this to be meaningful. */
38 #define kstat_this_cpu __get_cpu_var(kstat)
40 extern unsigned long long nr_context_switches(void);
44 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
45 struct irq_desc *desc)
47 kstat_this_cpu.irqs[irq]++;
50 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
52 return kstat_cpu(cpu).irqs[irq];
56 * Number of interrupts per specific IRQ source, since bootup
58 static inline unsigned int kstat_irqs(unsigned int irq)
63 for_each_possible_cpu(cpu)
64 sum += kstat_irqs_cpu(irq, cpu);
69 extern unsigned long long task_delta_exec(struct task_struct *);
70 extern void account_user_time(struct task_struct *, cputime_t);
71 extern void account_user_time_scaled(struct task_struct *, cputime_t);
72 extern void account_system_time(struct task_struct *, int, cputime_t);
73 extern void account_system_time_scaled(struct task_struct *, cputime_t);
74 extern void account_steal_time(struct task_struct *, cputime_t);
76 #endif /* _LINUX_KERNEL_STAT_H */