1 #ifndef _LINUX_KERNEL_STAT_H
2 #define _LINUX_KERNEL_STAT_H
5 #include <linux/threads.h>
6 #include <linux/percpu.h>
7 #include <linux/cpumask.h>
8 #include <linux/interrupt.h>
9 #include <linux/sched.h>
11 #include <asm/cputime.h>
14 * 'kernel_stat.h' contains the definitions needed for doing
15 * some kernel statistics (CPU usage, context switches ...),
16 * used by rstatd/perfmeter
33 struct kernel_cpustat {
34 u64 cpustat[NR_STATS];
38 #ifndef CONFIG_GENERIC_HARDIRQS
39 unsigned int irqs[NR_IRQS];
41 unsigned long irqs_sum;
42 unsigned int softirqs[NR_SOFTIRQS];
45 DECLARE_PER_CPU(struct kernel_stat, kstat);
46 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
48 /* Must have preemption disabled for this to be meaningful. */
49 #define kstat_this_cpu (&__get_cpu_var(kstat))
50 #define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
51 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
52 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
54 extern unsigned long long nr_context_switches(void);
56 #ifndef CONFIG_GENERIC_HARDIRQS
60 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
61 struct irq_desc *desc)
63 __this_cpu_inc(kstat.irqs[irq]);
64 __this_cpu_inc(kstat.irqs_sum);
67 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
69 return kstat_cpu(cpu).irqs[irq];
72 #include <linux/irq.h>
73 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
75 #define kstat_incr_irqs_this_cpu(irqno, DESC) \
77 __this_cpu_inc(*(DESC)->kstat_irqs); \
78 __this_cpu_inc(kstat.irqs_sum); \
83 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
85 __this_cpu_inc(kstat.softirqs[irq]);
88 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
90 return kstat_cpu(cpu).softirqs[irq];
94 * Number of interrupts per specific IRQ source, since bootup
96 #ifndef CONFIG_GENERIC_HARDIRQS
97 static inline unsigned int kstat_irqs(unsigned int irq)
102 for_each_possible_cpu(cpu)
103 sum += kstat_irqs_cpu(irq, cpu);
108 extern unsigned int kstat_irqs(unsigned int irq);
112 * Number of interrupts per cpu, since bootup
114 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
116 return kstat_cpu(cpu).irqs_sum;
120 * Lock/unlock the current runqueue - to extract task statistics:
122 extern unsigned long long task_delta_exec(struct task_struct *);
124 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
125 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
126 extern void account_steal_time(cputime_t);
127 extern void account_idle_time(cputime_t);
129 extern void account_process_tick(struct task_struct *, int user);
130 extern void account_steal_ticks(unsigned long ticks);
131 extern void account_idle_ticks(unsigned long ticks);
133 #endif /* _LINUX_KERNEL_STAT_H */