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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>
/*
* 'kernel_stat.h' contains the definitions needed for doing
* some kernel statistics (CPU usage, context switches ...),
* used by rstatd/perfmeter
*/
struct cpu_usage_stat {
u64 user;
u64 nice;
u64 system;
u64 softirq;
u64 irq;
u64 idle;
u64 iowait;
};
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;
}
#endif /* _LINUX_KERNEL_STAT_H */
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