Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
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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#include <asm/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#ifndef CONFIG_GENERIC_HARDIRQS
40 unsigned int irqs[NR_IRQS];
41#endif
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 (&__get_cpu_var(kstat))
51#define kcpustat_this_cpu (&__get_cpu_var(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
57#ifndef CONFIG_GENERIC_HARDIRQS
58
59struct irq_desc;
60
61static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
62 struct irq_desc *desc)
63{
64 __this_cpu_inc(kstat.irqs[irq]);
65 __this_cpu_inc(kstat.irqs_sum);
66}
67
68static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
69{
70 return kstat_cpu(cpu).irqs[irq];
71}
72#else
73#include <linux/irq.h>
74extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
75
76#define kstat_incr_irqs_this_cpu(irqno, DESC) \
77do { \
78 __this_cpu_inc(*(DESC)->kstat_irqs); \
79 __this_cpu_inc(kstat.irqs_sum); \
80} while (0)
81
82#endif
83
84static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
85{
86 __this_cpu_inc(kstat.softirqs[irq]);
87}
88
89static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
90{
91 return kstat_cpu(cpu).softirqs[irq];
92}
93
94/*
95 * Number of interrupts per specific IRQ source, since bootup
96 */
97#ifndef CONFIG_GENERIC_HARDIRQS
98static inline unsigned int kstat_irqs(unsigned int irq)
99{
100 unsigned int sum = 0;
101 int cpu;
102
103 for_each_possible_cpu(cpu)
104 sum += kstat_irqs_cpu(irq, cpu);
105
106 return sum;
107}
108#else
109extern unsigned int kstat_irqs(unsigned int irq);
110#endif
111
112/*
113 * Number of interrupts per cpu, since bootup
114 */
115static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
116{
117 return kstat_cpu(cpu).irqs_sum;
118}
119
120/*
121 * Lock/unlock the current runqueue - to extract task statistics:
122 */
123extern unsigned long long task_delta_exec(struct task_struct *);
124
125extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
126extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
127extern void account_steal_time(cputime_t);
128extern void account_idle_time(cputime_t);
129
130#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
131static inline void account_process_tick(struct task_struct *tsk, int user)
132{
133 vtime_account_user(tsk);
134}
135#else
136extern void account_process_tick(struct task_struct *, int user);
137#endif
138
139extern void account_steal_ticks(unsigned long ticks);
140extern void account_idle_ticks(unsigned long ticks);
141
142#endif /* _LINUX_KERNEL_STAT_H */