1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_KERNEL_STAT_H |
3 | #define _LINUX_KERNEL_STAT_H |
4 | |
5 | #include <linux/smp.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> |
12 | #include <asm/irq.h> |
13 | |
14 | /* |
15 | * 'kernel_stat.h' contains the definitions needed for doing |
16 | * some kernel statistics (CPU usage, context switches ...), |
17 | * used by rstatd/perfmeter |
18 | */ |
19 | |
20 | enum cpu_usage_stat { |
21 | CPUTIME_USER, |
22 | CPUTIME_NICE, |
23 | CPUTIME_SYSTEM, |
24 | CPUTIME_SOFTIRQ, |
25 | CPUTIME_IRQ, |
26 | CPUTIME_IDLE, |
27 | CPUTIME_IOWAIT, |
28 | CPUTIME_STEAL, |
29 | CPUTIME_GUEST, |
30 | CPUTIME_GUEST_NICE, |
31 | #ifdef CONFIG_SCHED_CORE |
32 | CPUTIME_FORCEIDLE, |
33 | #endif |
34 | NR_STATS, |
35 | }; |
36 | |
37 | struct kernel_cpustat { |
38 | u64 cpustat[NR_STATS]; |
39 | }; |
40 | |
41 | struct kernel_stat { |
42 | unsigned long irqs_sum; |
43 | unsigned int softirqs[NR_SOFTIRQS]; |
44 | }; |
45 | |
46 | DECLARE_PER_CPU(struct kernel_stat, kstat); |
47 | DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat); |
48 | |
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) |
54 | |
55 | extern unsigned long long nr_context_switches_cpu(int cpu); |
56 | extern unsigned long long nr_context_switches(void); |
57 | |
58 | extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu); |
59 | extern void kstat_incr_irq_this_cpu(unsigned int irq); |
60 | |
61 | static inline void kstat_incr_softirqs_this_cpu(unsigned int irq) |
62 | { |
63 | __this_cpu_inc(kstat.softirqs[irq]); |
64 | } |
65 | |
66 | static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu) |
67 | { |
68 | return kstat_cpu(cpu).softirqs[irq]; |
69 | } |
70 | |
71 | static inline unsigned int kstat_cpu_softirqs_sum(int cpu) |
72 | { |
73 | int i; |
74 | unsigned int sum = 0; |
75 | |
76 | for (i = 0; i < NR_SOFTIRQS; i++) |
77 | sum += kstat_softirqs_cpu(irq: i, cpu); |
78 | |
79 | return sum; |
80 | } |
81 | |
82 | /* |
83 | * Number of interrupts per specific IRQ source, since bootup |
84 | */ |
85 | extern unsigned int kstat_irqs_usr(unsigned int irq); |
86 | |
87 | /* |
88 | * Number of interrupts per cpu, since bootup |
89 | */ |
90 | static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu) |
91 | { |
92 | return kstat_cpu(cpu).irqs_sum; |
93 | } |
94 | |
95 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN |
96 | extern u64 kcpustat_field(struct kernel_cpustat *kcpustat, |
97 | enum cpu_usage_stat usage, int cpu); |
98 | extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu); |
99 | #else |
100 | static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat, |
101 | enum cpu_usage_stat usage, int cpu) |
102 | { |
103 | return kcpustat->cpustat[usage]; |
104 | } |
105 | |
106 | static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu) |
107 | { |
108 | *dst = kcpustat_cpu(cpu); |
109 | } |
110 | |
111 | #endif |
112 | |
113 | extern void account_user_time(struct task_struct *, u64); |
114 | extern void account_guest_time(struct task_struct *, u64); |
115 | extern void account_system_time(struct task_struct *, int, u64); |
116 | extern void account_system_index_time(struct task_struct *, u64, |
117 | enum cpu_usage_stat); |
118 | extern void account_steal_time(u64); |
119 | extern void account_idle_time(u64); |
120 | extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu); |
121 | |
122 | #ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE |
123 | static inline void account_process_tick(struct task_struct *tsk, int user) |
124 | { |
125 | vtime_flush(tsk); |
126 | } |
127 | #else |
128 | extern void account_process_tick(struct task_struct *, int user); |
129 | #endif |
130 | |
131 | extern void account_idle_ticks(unsigned long ticks); |
132 | |
133 | #ifdef CONFIG_SCHED_CORE |
134 | extern void __account_forceidle_time(struct task_struct *tsk, u64 delta); |
135 | #endif |
136 | |
137 | #endif /* _LINUX_KERNEL_STAT_H */ |
138 | |