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1da177e4 LT |
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 | ||
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 | */ | |
44 | static 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 | ||
55 | extern void account_user_time(struct task_struct *, cputime_t); | |
56 | extern void account_system_time(struct task_struct *, int, cputime_t); | |
57 | extern void account_steal_time(struct task_struct *, cputime_t); | |
58 | ||
59 | #endif /* _LINUX_KERNEL_STAT_H */ |