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TOMOYO Linux Cross Reference
Linux/include/linux/kernel_stat.h

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  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 <linux/sched.h>
 10 #include <linux/vtime.h>
 11 #include <asm/irq.h>
 12 #include <asm/cputime.h>
 13 
 14 /*
 15  * 'kernel_stat.h' contains the definitions needed for doing
 16  * some kernel statistics (CPU usage, context switches ...),
 17  * used by rstatd/perfmeter
 18  */
 19 
 20 enum cpu_usage_stat {
 21         CPUTIME_USER,
 22         CPUTIME_NICE,
 23         CPUTIME_SYSTEM,
 24         CPUTIME_SOFTIRQ,
 25         CPUTIME_IRQ,
 26         CPUTIME_IDLE,
 27         CPUTIME_IOWAIT,
 28         CPUTIME_STEAL,
 29         CPUTIME_GUEST,
 30         CPUTIME_GUEST_NICE,
 31         NR_STATS,
 32 };
 33 
 34 struct kernel_cpustat {
 35         u64 cpustat[NR_STATS];
 36 };
 37 
 38 struct kernel_stat {
 39 #ifndef CONFIG_GENERIC_HARDIRQS
 40        unsigned int irqs[NR_IRQS];
 41 #endif
 42         unsigned long irqs_sum;
 43         unsigned int softirqs[NR_SOFTIRQS];
 44 };
 45 
 46 DECLARE_PER_CPU(struct kernel_stat, kstat);
 47 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
 48 
 49 /* Must have preemption disabled for this to be meaningful. */
 50 #define kstat_this_cpu (&__get_cpu_var(kstat))
 51 #define kcpustat_this_cpu (&__get_cpu_var(kernel_cpustat))
 52 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
 53 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
 54 
 55 extern unsigned long long nr_context_switches(void);
 56 
 57 #ifndef CONFIG_GENERIC_HARDIRQS
 58 
 59 struct irq_desc;
 60 
 61 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
 62                                             struct irq_desc *desc)
 63 {
 64         __this_cpu_inc(kstat.irqs[irq]);
 65         __this_cpu_inc(kstat.irqs_sum);
 66 }
 67 
 68 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
 69 {
 70        return kstat_cpu(cpu).irqs[irq];
 71 }
 72 #else
 73 #include <linux/irq.h>
 74 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
 75 
 76 #define kstat_incr_irqs_this_cpu(irqno, DESC)           \
 77 do {                                                    \
 78         __this_cpu_inc(*(DESC)->kstat_irqs);            \
 79         __this_cpu_inc(kstat.irqs_sum);                 \
 80 } while (0)
 81 
 82 #endif
 83 
 84 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
 85 {
 86         __this_cpu_inc(kstat.softirqs[irq]);
 87 }
 88 
 89 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
 90 {
 91        return kstat_cpu(cpu).softirqs[irq];
 92 }
 93 
 94 /*
 95  * Number of interrupts per specific IRQ source, since bootup
 96  */
 97 #ifndef CONFIG_GENERIC_HARDIRQS
 98 static inline unsigned int kstat_irqs(unsigned int irq)
 99 {
100         unsigned int sum = 0;
101         int cpu;
102 
103         for_each_possible_cpu(cpu)
104                 sum += kstat_irqs_cpu(irq, cpu);
105 
106         return sum;
107 }
108 #else
109 extern unsigned int kstat_irqs(unsigned int irq);
110 #endif
111 
112 /*
113  * Number of interrupts per cpu, since bootup
114  */
115 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
116 {
117         return kstat_cpu(cpu).irqs_sum;
118 }
119 
120 /*
121  * Lock/unlock the current runqueue - to extract task statistics:
122  */
123 extern unsigned long long task_delta_exec(struct task_struct *);
124 
125 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
126 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
127 extern void account_steal_time(cputime_t);
128 extern void account_idle_time(cputime_t);
129 
130 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
131 static inline void account_process_tick(struct task_struct *tsk, int user)
132 {
133         vtime_account_user(tsk);
134 }
135 #else
136 extern void account_process_tick(struct task_struct *, int user);
137 #endif
138 
139 extern void account_steal_ticks(unsigned long ticks);
140 extern void account_idle_ticks(unsigned long ticks);
141 
142 #endif /* _LINUX_KERNEL_STAT_H */
143 

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