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- #ifndef _LINUX_KERNEL_STAT_H
- #define _LINUX_KERNEL_STAT_H
-
- #include <linux/config.h>
- #include <asm/irq.h>
- #include <linux/smp.h>
- #include <linux/threads.h>
- #include <linux/percpu.h>
- #include <asm/cputime.h>
-
- /*
- * 'kernel_stat.h' contains the definitions needed for doing
- * some kernel statistics (CPU usage, context switches ...),
- * used by rstatd/perfmeter
- */
-
- struct cpu_usage_stat {
- cputime64_t user;
- cputime64_t nice;
- cputime64_t system;
- cputime64_t softirq;
- cputime64_t irq;
- cputime64_t idle;
- cputime64_t iowait;
- cputime64_t steal;
- };
-
- struct kernel_stat {
- struct cpu_usage_stat cpustat;
- unsigned int irqs[NR_IRQS];
- };
-
- DECLARE_PER_CPU(struct kernel_stat, kstat);
-
- #define kstat_cpu(cpu) per_cpu(kstat, cpu)
- /* Must have preemption disabled for this to be meaningful. */
- #define kstat_this_cpu __get_cpu_var(kstat)
-
- extern unsigned long long nr_context_switches(void);
-
- /*
- * Number of interrupts per specific IRQ source, since bootup
- */
- static inline int kstat_irqs(int irq)
- {
- int i, sum=0;
-
- for (i = 0; i < NR_CPUS; i++)
- if (cpu_possible(i))
- sum += kstat_cpu(i).irqs[irq];
-
- return sum;
- }
-
- extern void account_user_time(struct task_struct *, cputime_t);
- extern void account_system_time(struct task_struct *, int, cputime_t);
- extern void account_steal_time(struct task_struct *, cputime_t);
-
- #endif /* _LINUX_KERNEL_STAT_H */
-