ASoC: Only run power_check() on a widget once per run
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / linux / kernel_stat.h
blob0cce2db580c39ca6afaa76e19609ddf6de47e48b
1 #ifndef _LINUX_KERNEL_STAT_H
2 #define _LINUX_KERNEL_STAT_H
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>
13 * 'kernel_stat.h' contains the definitions needed for doing
14 * some kernel statistics (CPU usage, context switches ...),
15 * used by rstatd/perfmeter
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;
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];
40 DECLARE_PER_CPU(struct kernel_stat, kstat);
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)
46 extern unsigned long long nr_context_switches(void);
48 #ifndef CONFIG_GENERIC_HARDIRQS
50 struct irq_desc;
52 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
53 struct irq_desc *desc)
55 __this_cpu_inc(kstat.irqs[irq]);
56 __this_cpu_inc(kstat.irqs_sum);
59 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
61 return kstat_cpu(cpu).irqs[irq];
63 #else
64 #include <linux/irq.h>
65 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
67 #define kstat_incr_irqs_this_cpu(irqno, DESC) \
68 do { \
69 __this_cpu_inc(*(DESC)->kstat_irqs); \
70 __this_cpu_inc(kstat.irqs_sum); \
71 } while (0)
73 #endif
75 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
77 __this_cpu_inc(kstat.softirqs[irq]);
80 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
82 return kstat_cpu(cpu).softirqs[irq];
86 * Number of interrupts per specific IRQ source, since bootup
88 #ifndef CONFIG_GENERIC_HARDIRQS
89 static inline unsigned int kstat_irqs(unsigned int irq)
91 unsigned int sum = 0;
92 int cpu;
94 for_each_possible_cpu(cpu)
95 sum += kstat_irqs_cpu(irq, cpu);
97 return sum;
99 #else
100 extern unsigned int kstat_irqs(unsigned int irq);
101 #endif
104 * Number of interrupts per cpu, since bootup
106 static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
108 return kstat_cpu(cpu).irqs_sum;
112 * Lock/unlock the current runqueue - to extract task statistics:
114 extern unsigned long long task_delta_exec(struct task_struct *);
116 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
117 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
118 extern void account_steal_time(cputime_t);
119 extern void account_idle_time(cputime_t);
121 extern void account_process_tick(struct task_struct *, int user);
122 extern void account_steal_ticks(unsigned long ticks);
123 extern void account_idle_ticks(unsigned long ticks);
125 #endif /* _LINUX_KERNEL_STAT_H */