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/config.h>
5#include <asm/irq.h>
6#include <linux/smp.h>
7#include <linux/threads.h>
8#include <linux/percpu.h>
9#include <linux/cpumask.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};
28
29struct kernel_stat {
30 struct cpu_usage_stat cpustat;
31 unsigned int irqs[NR_IRQS];
32};
33
34DECLARE_PER_CPU(struct kernel_stat, kstat);
35
36#define kstat_cpu(cpu) per_cpu(kstat, cpu)
37/* Must have preemption disabled for this to be meaningful. */
38#define kstat_this_cpu __get_cpu_var(kstat)
39
40extern unsigned long long nr_context_switches(void);
41
42/*
43 * Number of interrupts per specific IRQ source, since bootup
44 */
45static inline int kstat_irqs(int irq)
46{
47 int cpu, sum = 0;
48
49 for_each_possible_cpu(cpu)
50 sum += kstat_cpu(cpu).irqs[irq];
51
52 return sum;
53}
54
55extern void account_user_time(struct task_struct *, cputime_t);
56extern void account_system_time(struct task_struct *, int, cputime_t);
57extern void account_steal_time(struct task_struct *, cputime_t);
58
59#endif /* _LINUX_KERNEL_STAT_H */