Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
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 NR_STATS,
31};
32
33struct kernel_cpustat {
34 u64 cpustat[NR_STATS];
35};
36
37struct kernel_stat {
38 unsigned long irqs_sum;
39 unsigned int softirqs[NR_SOFTIRQS];
40};
41
42DECLARE_PER_CPU(struct kernel_stat, kstat);
43DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
44
45/* Must have preemption disabled for this to be meaningful. */
46#define kstat_this_cpu this_cpu_ptr(&kstat)
47#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
48#define kstat_cpu(cpu) per_cpu(kstat, cpu)
49#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
50
51extern unsigned long long nr_context_switches(void);
52
53extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
54extern void kstat_incr_irq_this_cpu(unsigned int irq);
55
56static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
57{
58 __this_cpu_inc(kstat.softirqs[irq]);
59}
60
61static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
62{
63 return kstat_cpu(cpu).softirqs[irq];
64}
65
66/*
67 * Number of interrupts per specific IRQ source, since bootup
68 */
69extern unsigned int kstat_irqs(unsigned int irq);
70extern unsigned int kstat_irqs_usr(unsigned int irq);
71
72/*
73 * Number of interrupts per cpu, since bootup
74 */
75static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
76{
77 return kstat_cpu(cpu).irqs_sum;
78}
79
80extern void account_user_time(struct task_struct *, u64);
81extern void account_guest_time(struct task_struct *, u64);
82extern void account_system_time(struct task_struct *, int, u64);
83extern void account_system_index_time(struct task_struct *, u64,
84 enum cpu_usage_stat);
85extern void account_steal_time(u64);
86extern void account_idle_time(u64);
87
88#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
89static inline void account_process_tick(struct task_struct *tsk, int user)
90{
91 vtime_flush(tsk);
92}
93#else
94extern void account_process_tick(struct task_struct *, int user);
95#endif
96
97extern void account_idle_ticks(unsigned long ticks);
98
99#endif /* _LINUX_KERNEL_STAT_H */