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 <asm/irq.h>
10#include <asm/cputime.h>
11
12/*
13 * 'kernel_stat.h' contains the definitions needed for doing
14 * some kernel statistics (CPU usage, context switches ...),
15 * used by rstatd/perfmeter
16 */
17
18struct cpu_usage_stat {
19 cputime64_t user;
20 cputime64_t nice;
21 cputime64_t system;
22 cputime64_t softirq;
23 cputime64_t irq;
24 cputime64_t idle;
25 cputime64_t iowait;
26 cputime64_t steal;
27 cputime64_t guest;
28 cputime64_t guest_nice;
29};
30
31struct kernel_stat {
32 struct cpu_usage_stat cpustat;
33#ifndef CONFIG_GENERIC_HARDIRQS
34 unsigned int irqs[NR_IRQS];
35#endif
36 unsigned long irqs_sum;
37 unsigned int softirqs[NR_SOFTIRQS];
38};
39
40DECLARE_PER_CPU(struct kernel_stat, kstat);
41
42#define kstat_cpu(cpu) per_cpu(kstat, cpu)
43/* Must have preemption disabled for this to be meaningful. */
44#define kstat_this_cpu __get_cpu_var(kstat)
45
46extern unsigned long long nr_context_switches(void);
47
48#ifndef CONFIG_GENERIC_HARDIRQS
49
50struct irq_desc;
51
52static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
53 struct irq_desc *desc)
54{
55 __this_cpu_inc(kstat.irqs[irq]);
56 __this_cpu_inc(kstat.irqs_sum);
57}
58
59static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
60{
61 return kstat_cpu(cpu).irqs[irq];
62}
63#else
64#include <linux/irq.h>
65extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
66
67#define kstat_incr_irqs_this_cpu(irqno, DESC) \
68do { \
69 __this_cpu_inc(*(DESC)->kstat_irqs); \
70 __this_cpu_inc(kstat.irqs_sum); \
71} while (0)
72
73#endif
74
75static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
76{
77 __this_cpu_inc(kstat.softirqs[irq]);
78}
79
80static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
81{
82 return kstat_cpu(cpu).softirqs[irq];
83}
84
85/*
86 * Number of interrupts per specific IRQ source, since bootup
87 */
88#ifndef CONFIG_GENERIC_HARDIRQS
89static inline unsigned int kstat_irqs(unsigned int irq)
90{
91 unsigned int sum = 0;
92 int cpu;
93
94 for_each_possible_cpu(cpu)
95 sum += kstat_irqs_cpu(irq, cpu);
96
97 return sum;
98}
99#else
100extern unsigned int kstat_irqs(unsigned int irq);
101#endif
102
103/*
104 * Number of interrupts per cpu, since bootup
105 */
106static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
107{
108 return kstat_cpu(cpu).irqs_sum;
109}
110
111/*
112 * Lock/unlock the current runqueue - to extract task statistics:
113 */
114extern unsigned long long task_delta_exec(struct task_struct *);
115
116extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
117extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
118extern void account_steal_time(cputime_t);
119extern void account_idle_time(cputime_t);
120
121extern void account_process_tick(struct task_struct *, int user);
122extern void account_steal_ticks(unsigned long ticks);
123extern void account_idle_ticks(unsigned long ticks);
124
125#endif /* _LINUX_KERNEL_STAT_H */