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 <asm/irq.h>
11#include <asm/cputime.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#ifndef CONFIG_GENERIC_HARDIRQS
39 unsigned int irqs[NR_IRQS];
40#endif
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 (&__get_cpu_var(kstat))
50#define kcpustat_this_cpu (&__get_cpu_var(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(void);
55
56#ifndef CONFIG_GENERIC_HARDIRQS
57
58struct irq_desc;
59
60static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
61 struct irq_desc *desc)
62{
63 __this_cpu_inc(kstat.irqs[irq]);
64 __this_cpu_inc(kstat.irqs_sum);
65}
66
67static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
68{
69 return kstat_cpu(cpu).irqs[irq];
70}
71#else
72#include <linux/irq.h>
73extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
74
75#define kstat_incr_irqs_this_cpu(irqno, DESC) \
76do { \
77 __this_cpu_inc(*(DESC)->kstat_irqs); \
78 __this_cpu_inc(kstat.irqs_sum); \
79} while (0)
80
81#endif
82
83static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
84{
85 __this_cpu_inc(kstat.softirqs[irq]);
86}
87
88static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
89{
90 return kstat_cpu(cpu).softirqs[irq];
91}
92
93/*
94 * Number of interrupts per specific IRQ source, since bootup
95 */
96#ifndef CONFIG_GENERIC_HARDIRQS
97static inline unsigned int kstat_irqs(unsigned int irq)
98{
99 unsigned int sum = 0;
100 int cpu;
101
102 for_each_possible_cpu(cpu)
103 sum += kstat_irqs_cpu(irq, cpu);
104
105 return sum;
106}
107#else
108extern unsigned int kstat_irqs(unsigned int irq);
109#endif
110
111/*
112 * Number of interrupts per cpu, since bootup
113 */
114static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
115{
116 return kstat_cpu(cpu).irqs_sum;
117}
118
119/*
120 * Lock/unlock the current runqueue - to extract task statistics:
121 */
122extern unsigned long long task_delta_exec(struct task_struct *);
123
124extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
125extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
126extern void account_steal_time(cputime_t);
127extern void account_idle_time(cputime_t);
128
129extern void account_process_tick(struct task_struct *, int user);
130extern void account_steal_ticks(unsigned long ticks);
131extern void account_idle_ticks(unsigned long ticks);
132
133#endif /* _LINUX_KERNEL_STAT_H */