1#ifndef _LINUX_KERNEL_STAT_H
2#define _LINUX_KERNEL_STAT_H
3
4#include <linux/smp.h>
5#include <linux/threads.h>
6#include <linux/percpu.h>
7#include <linux/cpumask.h>
8#include <linux/interrupt.h>
9#include <linux/sched.h>
10#include <linux/vtime.h>
11#include <asm/irq.h>
12#include <linux/cputime.h>
13
14/*
15 * 'kernel_stat.h' contains the definitions needed for doing
16 * some kernel statistics (CPU usage, context switches ...),
17 * used by rstatd/perfmeter
18 */
19
20enum cpu_usage_stat {
21	CPUTIME_USER,
22	CPUTIME_NICE,
23	CPUTIME_SYSTEM,
24	CPUTIME_SOFTIRQ,
25	CPUTIME_IRQ,
26	CPUTIME_IDLE,
27	CPUTIME_IOWAIT,
28	CPUTIME_STEAL,
29	CPUTIME_GUEST,
30	CPUTIME_GUEST_NICE,
31	NR_STATS,
32};
33
34struct kernel_cpustat {
35	u64 cpustat[NR_STATS];
36};
37
38struct kernel_stat {
39	unsigned long irqs_sum;
40	unsigned int softirqs[NR_SOFTIRQS];
41};
42
43DECLARE_PER_CPU(struct kernel_stat, kstat);
44DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
45
46/* Must have preemption disabled for this to be meaningful. */
47#define kstat_this_cpu this_cpu_ptr(&kstat)
48#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
49#define kstat_cpu(cpu) per_cpu(kstat, cpu)
50#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
51
52extern unsigned long long nr_context_switches(void);
53
54extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
55extern void kstat_incr_irq_this_cpu(unsigned int irq);
56
57static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
58{
59	__this_cpu_inc(kstat.softirqs[irq]);
60}
61
62static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
63{
64       return kstat_cpu(cpu).softirqs[irq];
65}
66
67/*
68 * Number of interrupts per specific IRQ source, since bootup
69 */
70extern unsigned int kstat_irqs(unsigned int irq);
71extern unsigned int kstat_irqs_usr(unsigned int irq);
72
73/*
74 * Number of interrupts per cpu, since bootup
75 */
76static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
77{
78	return kstat_cpu(cpu).irqs_sum;
79}
80
81extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
82extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
83extern void account_steal_time(cputime_t);
84extern void account_idle_time(cputime_t);
85
86#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
87static inline void account_process_tick(struct task_struct *tsk, int user)
88{
89	vtime_account_user(tsk);
90}
91#else
92extern void account_process_tick(struct task_struct *, int user);
93#endif
94
95extern void account_steal_ticks(unsigned long ticks);
96extern void account_idle_ticks(unsigned long ticks);
97
98#endif /* _LINUX_KERNEL_STAT_H */
99