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 */
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