diff options
Diffstat (limited to 'include/linux/kernel_stat.h')
| -rw-r--r-- | include/linux/kernel_stat.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h new file mode 100644 index 00000000000..dba27749b42 --- /dev/null +++ b/include/linux/kernel_stat.h @@ -0,0 +1,59 @@ +#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 */ |