1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_KERNEL_STAT_H
3 #define _LINUX_KERNEL_STAT_H
6 #include <linux/threads.h>
7 #include <linux/percpu.h>
8 #include <linux/cpumask.h>
9 #include <linux/interrupt.h>
10 #include <linux/sched.h>
11 #include <linux/vtime.h>
15 * 'kernel_stat.h' contains the definitions needed for doing
16 * some kernel statistics (CPU usage, context switches ...),
17 * used by rstatd/perfmeter
31 #ifdef CONFIG_SCHED_CORE
37 struct kernel_cpustat {
38 u64 cpustat[NR_STATS];
42 unsigned long irqs_sum;
43 unsigned int softirqs[NR_SOFTIRQS];
46 DECLARE_PER_CPU(struct kernel_stat, kstat);
47 DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
49 /* Must have preemption disabled for this to be meaningful. */
50 #define kstat_this_cpu this_cpu_ptr(&kstat)
51 #define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
52 #define kstat_cpu(cpu) per_cpu(kstat, cpu)
53 #define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
55 extern unsigned long long nr_context_switches_cpu(int cpu);
56 extern unsigned long long nr_context_switches(void);
58 extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
59 extern void kstat_incr_irq_this_cpu(unsigned int irq);
61 static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
63 __this_cpu_inc(kstat.softirqs[irq]);
66 static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
68 return kstat_cpu(cpu).softirqs[irq];
71 static inline unsigned int kstat_cpu_softirqs_sum(int cpu)
76 for (i = 0; i < NR_SOFTIRQS; i++)
77 sum += kstat_softirqs_cpu(i, cpu);
82 #ifdef CONFIG_GENERIC_IRQ_STAT_SNAPSHOT
83 extern void kstat_snapshot_irqs(void);
84 extern unsigned int kstat_get_irq_since_snapshot(unsigned int irq);
86 static inline void kstat_snapshot_irqs(void) { }
87 static inline unsigned int kstat_get_irq_since_snapshot(unsigned int irq) { return 0; }
91 * Number of interrupts per specific IRQ source, since bootup
93 extern unsigned int kstat_irqs_usr(unsigned int irq);
96 * Number of interrupts per cpu, since bootup
98 static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu)
100 return kstat_cpu(cpu).irqs_sum;
103 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
104 extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
105 enum cpu_usage_stat usage, int cpu);
106 extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
108 static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
109 enum cpu_usage_stat usage, int cpu)
111 return kcpustat->cpustat[usage];
114 static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
116 *dst = kcpustat_cpu(cpu);
121 extern void account_user_time(struct task_struct *, u64);
122 extern void account_guest_time(struct task_struct *, u64);
123 extern void account_system_time(struct task_struct *, int, u64);
124 extern void account_system_index_time(struct task_struct *, u64,
125 enum cpu_usage_stat);
126 extern void account_steal_time(u64);
127 extern void account_idle_time(u64);
128 extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
130 #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
131 static inline void account_process_tick(struct task_struct *tsk, int user)
136 extern void account_process_tick(struct task_struct *, int user);
139 extern void account_idle_ticks(unsigned long ticks);
141 #ifdef CONFIG_SCHED_CORE
142 extern void __account_forceidle_time(struct task_struct *tsk, u64 delta);
145 #endif /* _LINUX_KERNEL_STAT_H */