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/config.h>
5#include <asm/irq.h>
6#include <linux/smp.h>
7#include <linux/threads.h>
8#include <linux/percpu.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};
27
28struct kernel_stat {
29 struct cpu_usage_stat cpustat;
30 unsigned int irqs[NR_IRQS];
31};
32
33DECLARE_PER_CPU(struct kernel_stat, kstat);
34
35#define kstat_cpu(cpu) per_cpu(kstat, cpu)
36/* Must have preemption disabled for this to be meaningful. */
37#define kstat_this_cpu __get_cpu_var(kstat)
38
39extern unsigned long long nr_context_switches(void);
40
41/*
42 * Number of interrupts per specific IRQ source, since bootup
43 */
44static inline int kstat_irqs(int irq)
45{
46 int i, sum=0;
47
48 for (i = 0; i < NR_CPUS; i++)
49 if (cpu_possible(i))
50 sum += kstat_cpu(i).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 */