Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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_cpu(int cpu);
56extern unsigned long long nr_context_switches(void);
57
58extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
59extern void kstat_incr_irq_this_cpu(unsigned int irq);
60
61static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
62{
63 __this_cpu_inc(kstat.softirqs[irq]);
64}
65
66static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
67{
68 return kstat_cpu(cpu).softirqs[irq];
69}
70
71static inline unsigned int kstat_cpu_softirqs_sum(int cpu)
72{
73 int i;
74 unsigned int sum = 0;
75
76 for (i = 0; i < NR_SOFTIRQS; i++)
77 sum += kstat_softirqs_cpu(i, cpu);
78
79 return sum;
80}
81
82#ifdef CONFIG_GENERIC_IRQ_STAT_SNAPSHOT
83extern void kstat_snapshot_irqs(void);
84extern unsigned int kstat_get_irq_since_snapshot(unsigned int irq);
85#else
86static inline void kstat_snapshot_irqs(void) { }
87static inline unsigned int kstat_get_irq_since_snapshot(unsigned int irq) { return 0; }
88#endif
89
90/*
91 * Number of interrupts per specific IRQ source, since bootup
92 */
93extern unsigned int kstat_irqs_usr(unsigned int irq);
94
95/*
96 * Number of interrupts per cpu, since bootup
97 */
98static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu)
99{
100 return kstat_cpu(cpu).irqs_sum;
101}
102
103#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
104extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
105 enum cpu_usage_stat usage, int cpu);
106extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
107#else
108static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
109 enum cpu_usage_stat usage, int cpu)
110{
111 return kcpustat->cpustat[usage];
112}
113
114static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
115{
116 *dst = kcpustat_cpu(cpu);
117}
118
119#endif
120
121extern void account_user_time(struct task_struct *, u64);
122extern void account_guest_time(struct task_struct *, u64);
123extern void account_system_time(struct task_struct *, int, u64);
124extern void account_system_index_time(struct task_struct *, u64,
125 enum cpu_usage_stat);
126extern void account_steal_time(u64);
127extern void account_idle_time(u64);
128extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
129
130#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
131static inline void account_process_tick(struct task_struct *tsk, int user)
132{
133 vtime_flush(tsk);
134}
135#else
136extern void account_process_tick(struct task_struct *, int user);
137#endif
138
139extern void account_idle_ticks(unsigned long ticks);
140
141#ifdef CONFIG_SCHED_CORE
142extern void __account_forceidle_time(struct task_struct *tsk, u64 delta);
143#endif
144
145#endif /* _LINUX_KERNEL_STAT_H */