1 #ifndef _LINUX_KERNEL_STAT_H
2 #define _LINUX_KERNEL_STAT_H
3
4 #include <asm/irq.h>
5 #include <linux/smp.h>
6 #include <linux/threads.h>
7 #include <linux/percpu.h>
8 #include <linux/cpumask.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
17 struct 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
28 struct kernel_stat {
29 struct cpu_usage_stat cpustat;
30 unsigned int irqs[NR_IRQS];
31 };
32
33 DECLARE_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
39 extern unsigned long long nr_context_switches(void);
40
41 /*
42 * Number of interrupts per specific IRQ source, since bootup
43 */
kstat_irqs(int irq)44 static inline int kstat_irqs(int irq)
45 {
46 int cpu, sum = 0;
47
48 for_each_possible_cpu(cpu)
49 sum += kstat_cpu(cpu).irqs[irq];
50
51 return sum;
52 }
53
54 extern void account_user_time(struct task_struct *, cputime_t);
55 extern void account_system_time(struct task_struct *, int, cputime_t);
56 extern void account_steal_time(struct task_struct *, cputime_t);
57
58 #endif /* _LINUX_KERNEL_STAT_H */
59