1 #ifndef _LINUX_KERNEL_STAT_H
2 #define _LINUX_KERNEL_STAT_H
4 #include <linux/config.h>
7 #include <linux/threads.h>
8 #include <linux/percpu.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 {
29 struct cpu_usage_stat cpustat;
30 unsigned int irqs[NR_IRQS];
33 DECLARE_PER_CPU(struct kernel_stat, kstat);
35 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
36 /* Must have preemption disabled for this to be meaningful. */
37 #define kstat_this_cpu __get_cpu_var(kstat)
39 extern unsigned long long nr_context_switches(void);
42 * Number of interrupts per specific IRQ source, since bootup
44 static inline int kstat_irqs(int irq)
48 for (i = 0; i < NR_CPUS; i++)
50 sum += kstat_cpu(i).irqs[irq];
55 extern void account_user_time(struct task_struct *, cputime_t);
56 extern void account_system_time(struct task_struct *, int, cputime_t);
57 extern void account_steal_time(struct task_struct *, cputime_t);
59 #endif /* _LINUX_KERNEL_STAT_H */