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 <linux/interrupt.h>
9 #include <asm/irq.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
18 struct 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 cputime64_t guest;
28 };
29
30 struct kernel_stat {
31 struct cpu_usage_stat cpustat;
32 #ifndef CONFIG_GENERIC_HARDIRQS
33 unsigned int irqs[NR_IRQS];
34 #endif
35 unsigned int softirqs[NR_SOFTIRQS];
36 };
37
38 DECLARE_PER_CPU(struct kernel_stat, kstat);
39
40 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
41 /* Must have preemption disabled for this to be meaningful. */
42 #define kstat_this_cpu __get_cpu_var(kstat)
43
44 extern unsigned long long nr_context_switches(void);
45
46 #ifndef CONFIG_GENERIC_HARDIRQS
47 #define kstat_irqs_this_cpu(irq) \
48 (kstat_this_cpu.irqs[irq])
49
50 struct irq_desc;
51
52 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
53 struct irq_desc *desc)
54 {
55 kstat_this_cpu.irqs[irq]++;
56 }
57
58 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
59 {
60 return kstat_cpu(cpu).irqs[irq];
61 }
62 #else
63 #include <linux/irq.h>
64 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
65 #define kstat_irqs_this_cpu(DESC) \
66 ((DESC)->kstat_irqs[smp_processor_id()])
67 #define kstat_incr_irqs_this_cpu(irqno, DESC) \
68 ((DESC)->kstat_irqs[smp_processor_id()]++)
69
70 #endif
71
72 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
73 {
74 kstat_this_cpu.softirqs[irq]++;
75 }
76
77 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
78 {
79 return kstat_cpu(cpu).softirqs[irq];
80 }
81
82 /*
83 * Number of interrupts per specific IRQ source, since bootup
84 */
85 static inline unsigned int kstat_irqs(unsigned int irq)
86 {
87 unsigned int sum = 0;
88 int cpu;
89
90 for_each_possible_cpu(cpu)
91 sum += kstat_irqs_cpu(irq, cpu);
92
93 return sum;
94 }
95
96
97 /*
98 * Lock/unlock the current runqueue - to extract task statistics:
99 */
100 extern unsigned long long task_delta_exec(struct task_struct *);
101
102 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
103 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
104 extern void account_steal_time(cputime_t);
105 extern void account_idle_time(cputime_t);
106
107 extern void account_process_tick(struct task_struct *, int user);
108 extern void account_steal_ticks(unsigned long ticks);
109 extern void account_idle_ticks(unsigned long ticks);
110
111 #endif /* _LINUX_KERNEL_STAT_H */
112
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