include/linux/kernel_stat.h

   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         cputime64_t guest_nice;
  29 };
  30
  31 struct kernel_stat {
  32         struct cpu_usage_stat   cpustat;
  33 #ifndef CONFIG_GENERIC_HARDIRQS
  34        unsigned int irqs[NR_IRQS];
  35 #endif
  36         unsigned long irqs_sum;
  37         unsigned int softirqs[NR_SOFTIRQS];
  38 };
  39
  40 DECLARE_PER_CPU(struct kernel_stat, kstat);
  41
  42 #define kstat_cpu(cpu)  per_cpu(kstat, cpu)
  43 /* Must have preemption disabled for this to be meaningful. */
  44 #define kstat_this_cpu  __get_cpu_var(kstat)
  45
  46 extern unsigned long long nr_context_switches(void);
  47
  48 #ifndef CONFIG_GENERIC_HARDIRQS
  49 #define kstat_irqs_this_cpu(irq) \
  50         (kstat_this_cpu.irqs[irq])
  51
  52 struct irq_desc;
  53
  54 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
  55                                             struct irq_desc *desc)
  56 {
  57         kstat_this_cpu.irqs[irq]++;
  58         kstat_this_cpu.irqs_sum++;
  59 }
  60
  61 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
  62 {
  63        return kstat_cpu(cpu).irqs[irq];
  64 }
  65 #else
  66 #include <linux/irq.h>
  67 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
  68 #define kstat_irqs_this_cpu(DESC) \
  69         ((DESC)->kstat_irqs[smp_processor_id()])
  70 #define kstat_incr_irqs_this_cpu(irqno, DESC) do {\
  71         ((DESC)->kstat_irqs[smp_processor_id()]++);\
  72         kstat_this_cpu.irqs_sum++; } while (0)
  73
  74 #endif
  75
  76 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
  77 {
  78         kstat_this_cpu.softirqs[irq]++;
  79 }
  80
  81 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
  82 {
  83        return kstat_cpu(cpu).softirqs[irq];
  84 }
  85
  86 /*
  87  * Number of interrupts per specific IRQ source, since bootup
  88  */
  89 #ifndef CONFIG_GENERIC_HARDIRQS
  90 static inline unsigned int kstat_irqs(unsigned int irq)
  91 {
  92         unsigned int sum = 0;
  93         int cpu;
  94
  95         for_each_possible_cpu(cpu)
  96                 sum += kstat_irqs_cpu(irq, cpu);
  97
  98         return sum;
  99 }
 100 #else
 101 extern unsigned int kstat_irqs(unsigned int irq);
 102 #endif
 103
 104 /*
 105  * Number of interrupts per cpu, since bootup
 106  */
 107 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
 108 {
 109         return kstat_cpu(cpu).irqs_sum;
 110 }
 111
 112 /*
 113  * Lock/unlock the current runqueue - to extract task statistics:
 114  */
 115 extern unsigned long long task_delta_exec(struct task_struct *);
 116
 117 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
 118 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
 119 extern void account_steal_time(cputime_t);
 120 extern void account_idle_time(cputime_t);
 121
 122 extern void account_process_tick(struct task_struct *, int user);
 123 extern void account_steal_ticks(unsigned long ticks);
 124 extern void account_idle_ticks(unsigned long ticks);
 125
 126 #endif /* _LINUX_KERNEL_STAT_H */