async: make sure independent async domains can't accidentally entangle
[linux-2.6/mini2440.git] / include / linux / kernel_stat.h
blob0c8b89f28a95eeccc1956c132777621bacf4d4c5
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 <asm/irq.h>
9 #include <asm/cputime.h>
12 * 'kernel_stat.h' contains the definitions needed for doing
13 * some kernel statistics (CPU usage, context switches ...),
14 * used by rstatd/perfmeter
17 struct cpu_usage_stat {
18 cputime64_t user;
19 cputime64_t nice;
20 cputime64_t system;
21 cputime64_t softirq;
22 cputime64_t irq;
23 cputime64_t idle;
24 cputime64_t iowait;
25 cputime64_t steal;
26 cputime64_t guest;
29 struct kernel_stat {
30 struct cpu_usage_stat cpustat;
31 #ifndef CONFIG_GENERIC_HARDIRQS
32 unsigned int irqs[NR_IRQS];
33 #endif
36 DECLARE_PER_CPU(struct kernel_stat, kstat);
38 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
39 /* Must have preemption disabled for this to be meaningful. */
40 #define kstat_this_cpu __get_cpu_var(kstat)
42 extern unsigned long long nr_context_switches(void);
44 #ifndef CONFIG_GENERIC_HARDIRQS
45 #define kstat_irqs_this_cpu(irq) \
46 (kstat_this_cpu.irqs[irq])
48 struct irq_desc;
50 static inline void kstat_incr_irqs_this_cpu(unsigned int irq,
51 struct irq_desc *desc)
53 kstat_this_cpu.irqs[irq]++;
56 static inline unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
58 return kstat_cpu(cpu).irqs[irq];
60 #else
61 #include <linux/irq.h>
62 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
63 #define kstat_irqs_this_cpu(DESC) \
64 ((DESC)->kstat_irqs[smp_processor_id()])
65 #define kstat_incr_irqs_this_cpu(irqno, DESC) \
66 ((DESC)->kstat_irqs[smp_processor_id()]++)
68 #endif
71 * Number of interrupts per specific IRQ source, since bootup
73 static inline unsigned int kstat_irqs(unsigned int irq)
75 unsigned int sum = 0;
76 int cpu;
78 for_each_possible_cpu(cpu)
79 sum += kstat_irqs_cpu(irq, cpu);
81 return sum;
84 extern unsigned long long task_delta_exec(struct task_struct *);
85 extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
86 extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
87 extern void account_steal_time(cputime_t);
88 extern void account_idle_time(cputime_t);
90 extern void account_process_tick(struct task_struct *, int user);
91 extern void account_steal_ticks(unsigned long ticks);
92 extern void account_idle_ticks(unsigned long ticks);
94 #endif /* _LINUX_KERNEL_STAT_H */