1 #ifndef _LINUX_KERNEL_STAT_H
2 #define _LINUX_KERNEL_STAT_H
4 #include <linux/config.h>
7 #include <linux/threads.h>
8 #include <linux/percpu.h>
11 * 'kernel_stat.h' contains the definitions needed for doing
12 * some kernel statistics (CPU usage, context switches ...),
13 * used by rstatd/perfmeter
16 struct cpu_usage_stat {
27 struct cpu_usage_stat cpustat;
28 unsigned int irqs[NR_IRQS];
31 DECLARE_PER_CPU(struct kernel_stat, kstat);
33 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
34 /* Must have preemption disabled for this to be meaningful. */
35 #define kstat_this_cpu __get_cpu_var(kstat)
37 extern unsigned long long nr_context_switches(void);
38 extern unsigned long long nr_preempt(void);
41 * Number of interrupts per specific IRQ source, since bootup
43 static inline int kstat_irqs(int irq)
47 for (i = 0; i < NR_CPUS; i++)
49 sum += kstat_cpu(i).irqs[irq];
54 #endif /* _LINUX_KERNEL_STAT_H */