diff options
Diffstat (limited to 'include/linux/kernel_stat.h')
-rw-r--r-- | include/linux/kernel_stat.h | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h new file mode 100644 index 000000000..90e2fdc17 --- /dev/null +++ b/include/linux/kernel_stat.h @@ -0,0 +1,125 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_KERNEL_STAT_H +#define _LINUX_KERNEL_STAT_H + +#include <linux/smp.h> +#include <linux/threads.h> +#include <linux/percpu.h> +#include <linux/cpumask.h> +#include <linux/interrupt.h> +#include <linux/sched.h> +#include <linux/vtime.h> +#include <asm/irq.h> + +/* + * 'kernel_stat.h' contains the definitions needed for doing + * some kernel statistics (CPU usage, context switches ...), + * used by rstatd/perfmeter + */ + +enum cpu_usage_stat { + CPUTIME_USER, + CPUTIME_NICE, + CPUTIME_SYSTEM, + CPUTIME_SOFTIRQ, + CPUTIME_IRQ, + CPUTIME_IDLE, + CPUTIME_IOWAIT, + CPUTIME_STEAL, + CPUTIME_GUEST, + CPUTIME_GUEST_NICE, +#ifdef CONFIG_SCHED_CORE + CPUTIME_FORCEIDLE, +#endif + NR_STATS, +}; + +struct kernel_cpustat { + u64 cpustat[NR_STATS]; +}; + +struct kernel_stat { + unsigned long irqs_sum; + unsigned int softirqs[NR_SOFTIRQS]; +}; + +DECLARE_PER_CPU(struct kernel_stat, kstat); +DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat); + +/* Must have preemption disabled for this to be meaningful. */ +#define kstat_this_cpu this_cpu_ptr(&kstat) +#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat) +#define kstat_cpu(cpu) per_cpu(kstat, cpu) +#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu) + +extern unsigned long long nr_context_switches(void); + +extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu); +extern void kstat_incr_irq_this_cpu(unsigned int irq); + +static inline void kstat_incr_softirqs_this_cpu(unsigned int irq) +{ + __this_cpu_inc(kstat.softirqs[irq]); +} + +static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu) +{ + return kstat_cpu(cpu).softirqs[irq]; +} + +/* + * Number of interrupts per specific IRQ source, since bootup + */ +extern unsigned int kstat_irqs_usr(unsigned int irq); + +/* + * Number of interrupts per cpu, since bootup + */ +static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu) +{ + return kstat_cpu(cpu).irqs_sum; +} + +#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN +extern u64 kcpustat_field(struct kernel_cpustat *kcpustat, + enum cpu_usage_stat usage, int cpu); +extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu); +#else +static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat, + enum cpu_usage_stat usage, int cpu) +{ + return kcpustat->cpustat[usage]; +} + +static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu) +{ + *dst = kcpustat_cpu(cpu); +} + +#endif + +extern void account_user_time(struct task_struct *, u64); +extern void account_guest_time(struct task_struct *, u64); +extern void account_system_time(struct task_struct *, int, u64); +extern void account_system_index_time(struct task_struct *, u64, + enum cpu_usage_stat); +extern void account_steal_time(u64); +extern void account_idle_time(u64); +extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu); + +#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE +static inline void account_process_tick(struct task_struct *tsk, int user) +{ + vtime_flush(tsk); +} +#else +extern void account_process_tick(struct task_struct *, int user); +#endif + +extern void account_idle_ticks(unsigned long ticks); + +#ifdef CONFIG_SCHED_CORE +extern void __account_forceidle_time(struct task_struct *tsk, u64 delta); +#endif + +#endif /* _LINUX_KERNEL_STAT_H */ |