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 <asm/irq.h>
9#include <asm/cputime.h>
10
11/*
12 * 'kernel_stat.h' contains the definitions needed for doing
13 * some kernel statistics (CPU usage, context switches ...),
14 * used by rstatd/perfmeter
15 */
16
17struct cpu_usage_stat {
18 cputime64_t user;
19 cputime64_t nice;
20 cputime64_t system;
21 cputime64_t softirq;
22 cputime64_t irq;
23 cputime64_t idle;
24 cputime64_t iowait;
25 cputime64_t steal;
26 cputime64_t guest;
27};
28
29struct kernel_stat {
30 struct cpu_usage_stat cpustat;
31#ifndef CONFIG_GENERIC_HARDIRQS
32 unsigned int irqs[NR_IRQS];
33#endif
34};
35
36DECLARE_PER_CPU(struct kernel_stat, kstat);
37
38#define kstat_cpu(cpu) per_cpu(kstat, cpu)
39/* Must have preemption disabled for this to be meaningful. */
40#define kstat_this_cpu __get_cpu_var(kstat)
41
42extern unsigned long long nr_context_switches(void);
43
44#ifndef CONFIG_GENERIC_HARDIRQS
45#define kstat_irqs_this_cpu(irq) \
46 (kstat_this_cpu.irqs[irq])
47
48struct irq_desc;
49
50static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
51 struct irq_desc *desc)
52{
53 kstat_this_cpu.irqs[irq]++;
54}
55
56static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
57{
58 return kstat_cpu(cpu).irqs[irq];
59}
60#else
61#include <linux/irq.h>
62extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
63#define kstat_irqs_this_cpu(DESC) \
64 ((DESC)->kstat_irqs[smp_processor_id()])
65#define kstat_incr_irqs_this_cpu(irqno, DESC) \
66 ((DESC)->kstat_irqs[smp_processor_id()]++)
67
68#endif
69
70/*
71 * Number of interrupts per specific IRQ source, since bootup
72 */
73static inline unsigned int kstat_irqs(unsigned int irq)
74{
75 unsigned int sum = 0;
76 int cpu;
77
78 for_each_possible_cpu(cpu)
79 sum += kstat_irqs_cpu(irq, cpu);
80
81 return sum;
82}
83
84extern unsigned long long task_delta_exec(struct task_struct *);
85extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
86extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
87extern void account_steal_time(cputime_t);
88extern void account_idle_time(cputime_t);
89
90extern void account_process_tick(struct task_struct *, int user);
91extern void account_steal_ticks(unsigned long ticks);
92extern void account_idle_ticks(unsigned long ticks);
93
94#endif /* _LINUX_KERNEL_STAT_H */