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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/interrupt.h>
9#include <linux/sched.h>
10#include <linux/vtime.h>
11#include <asm/irq.h>
12
13/*
14 * 'kernel_stat.h' contains the definitions needed for doing
15 * some kernel statistics (CPU usage, context switches ...),
16 * used by rstatd/perfmeter
17 */
18
19enum cpu_usage_stat {
20 CPUTIME_USER,
21 CPUTIME_NICE,
22 CPUTIME_SYSTEM,
23 CPUTIME_SOFTIRQ,
24 CPUTIME_IRQ,
25 CPUTIME_IDLE,
26 CPUTIME_IOWAIT,
27 CPUTIME_STEAL,
28 CPUTIME_GUEST,
29 CPUTIME_GUEST_NICE,
30#ifdef CONFIG_SCHED_CORE
31 CPUTIME_FORCEIDLE,
32#endif
33 NR_STATS,
34};
35
36struct kernel_cpustat {
37 u64 cpustat[NR_STATS];
38};
39
40struct kernel_stat {
41 unsigned long irqs_sum;
42 unsigned int softirqs[NR_SOFTIRQS];
43};
44
45DECLARE_PER_CPU(struct kernel_stat, kstat);
46DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
47
48/* Must have preemption disabled for this to be meaningful. */
49#define kstat_this_cpu this_cpu_ptr(&kstat)
50#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
51#define kstat_cpu(cpu) per_cpu(kstat, cpu)
52#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
53
54extern unsigned long long nr_context_switches_cpu(int cpu);
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
70static inline unsigned int kstat_cpu_softirqs_sum(int cpu)
71{
72 int i;
73 unsigned int sum = 0;
74
75 for (i = 0; i < NR_SOFTIRQS; i++)
76 sum += kstat_softirqs_cpu(irq: i, cpu);
77
78 return sum;
79}
80
81#ifdef CONFIG_GENERIC_IRQ_STAT_SNAPSHOT
82extern void kstat_snapshot_irqs(void);
83extern unsigned int kstat_get_irq_since_snapshot(unsigned int irq);
84#else
85static inline void kstat_snapshot_irqs(void) { }
86static inline unsigned int kstat_get_irq_since_snapshot(unsigned int irq) { return 0; }
87#endif
88
89/*
90 * Number of interrupts per specific IRQ source, since bootup
91 */
92extern unsigned int kstat_irqs_usr(unsigned int irq);
93
94/*
95 * Number of interrupts per cpu, since bootup
96 */
97static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu)
98{
99 return kstat_cpu(cpu).irqs_sum;
100}
101
102#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
103extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
104 enum cpu_usage_stat usage, int cpu);
105extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
106#else
107static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
108 enum cpu_usage_stat usage, int cpu)
109{
110 return kcpustat->cpustat[usage];
111}
112
113static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
114{
115 *dst = kcpustat_cpu(cpu);
116}
117
118#endif
119
120extern void account_user_time(struct task_struct *, u64);
121extern void account_guest_time(struct task_struct *, u64);
122extern void account_system_time(struct task_struct *, int, u64);
123extern void account_system_index_time(struct task_struct *, u64,
124 enum cpu_usage_stat);
125extern void account_steal_time(u64);
126extern void account_idle_time(u64);
127extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
128
129#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
130static inline void account_process_tick(struct task_struct *tsk, int user)
131{
132 vtime_flush(tsk);
133}
134#else
135extern void account_process_tick(struct task_struct *, int user);
136#endif
137
138extern void account_idle_ticks(unsigned long ticks);
139
140#ifdef CONFIG_SCHED_CORE
141extern void __account_forceidle_time(struct task_struct *tsk, u64 delta);
142#endif
143
144#endif /* _LINUX_KERNEL_STAT_H */
145

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