1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_KERNEL_STAT_H
3#define _LINUX_KERNEL_STAT_H
4
5#include <linux/smp.h>
6#include <linux/threads.h>
7#include <linux/percpu.h>
8#include <linux/cpumask.h>
9#include <linux/interrupt.h>
10#include <linux/sched.h>
11#include <linux/vtime.h>
12#include <asm/irq.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#ifdef CONFIG_SCHED_CORE
32 CPUTIME_FORCEIDLE,
33#endif
34 NR_STATS,
35};
36
37struct kernel_cpustat {
38 u64 cpustat[NR_STATS];
39};
40
41struct kernel_stat {
42 unsigned long irqs_sum;
43 unsigned int softirqs[NR_SOFTIRQS];
44};
45
46DECLARE_PER_CPU(struct kernel_stat, kstat);
47DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
48
49/* Must have preemption disabled for this to be meaningful. */
50#define kstat_this_cpu this_cpu_ptr(&kstat)
51#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
52#define kstat_cpu(cpu) per_cpu(kstat, cpu)
53#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
54
55extern unsigned long long nr_context_switches(void);
56
57extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
58extern void kstat_incr_irq_this_cpu(unsigned int irq);
59
60static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
61{
62 __this_cpu_inc(kstat.softirqs[irq]);
63}
64
65static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
66{
67 return kstat_cpu(cpu).softirqs[irq];
68}
69
70/*
71 * Number of interrupts per specific IRQ source, since bootup
72 */
73extern unsigned int kstat_irqs_usr(unsigned int irq);
74
75/*
76 * Number of interrupts per cpu, since bootup
77 */
78static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
79{
80 return kstat_cpu(cpu).irqs_sum;
81}
82
83#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
84extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
85 enum cpu_usage_stat usage, int cpu);
86extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
87#else
88static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
89 enum cpu_usage_stat usage, int cpu)
90{
91 return kcpustat->cpustat[usage];
92}
93
94static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
95{
96 *dst = kcpustat_cpu(cpu);
97}
98
99#endif
100
101extern void account_user_time(struct task_struct *, u64);
102extern void account_guest_time(struct task_struct *, u64);
103extern void account_system_time(struct task_struct *, int, u64);
104extern void account_system_index_time(struct task_struct *, u64,
105 enum cpu_usage_stat);
106extern void account_steal_time(u64);
107extern void account_idle_time(u64);
108extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
109
110#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
111static inline void account_process_tick(struct task_struct *tsk, int user)
112{
113 vtime_flush(tsk);
114}
115#else
116extern void account_process_tick(struct task_struct *, int user);
117#endif
118
119extern void account_idle_ticks(unsigned long ticks);
120
121#ifdef CONFIG_SCHED_CORE
122extern void __account_forceidle_time(struct task_struct *tsk, u64 delta);
123#endif
124
125#endif /* _LINUX_KERNEL_STAT_H */
126

source code of linux/include/linux/kernel_stat.h