aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/perf_counter.h171
-rw-r--r--include/linux/sched.h9
-rw-r--r--include/linux/syscalls.h6
3 files changed, 186 insertions, 0 deletions
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
new file mode 100644
index 000000000000..22c4469abf44
--- /dev/null
+++ b/include/linux/perf_counter.h
@@ -0,0 +1,171 @@
1/*
2 * Performance counters:
3 *
4 * Copyright(C) 2008, Thomas Gleixner <tglx@linutronix.de>
5 * Copyright(C) 2008, Red Hat, Inc., Ingo Molnar
6 *
7 * Data type definitions, declarations, prototypes.
8 *
9 * Started by: Thomas Gleixner and Ingo Molnar
10 *
11 * For licencing details see kernel-base/COPYING
12 */
13#ifndef _LINUX_PERF_COUNTER_H
14#define _LINUX_PERF_COUNTER_H
15
16#include <asm/atomic.h>
17
18#include <linux/list.h>
19#include <linux/mutex.h>
20#include <linux/rculist.h>
21#include <linux/rcupdate.h>
22#include <linux/spinlock.h>
23
24struct task_struct;
25
26/*
27 * Generalized hardware event types, used by the hw_event_type parameter
28 * of the sys_perf_counter_open() syscall:
29 */
30enum hw_event_types {
31 PERF_COUNT_CYCLES,
32 PERF_COUNT_INSTRUCTIONS,
33 PERF_COUNT_CACHE_REFERENCES,
34 PERF_COUNT_CACHE_MISSES,
35 PERF_COUNT_BRANCH_INSTRUCTIONS,
36 PERF_COUNT_BRANCH_MISSES,
37 /*
38 * If this bit is set in the type, then trigger NMI sampling:
39 */
40 PERF_COUNT_NMI = (1 << 30),
41};
42
43/*
44 * IRQ-notification data record type:
45 */
46enum perf_record_type {
47 PERF_RECORD_SIMPLE,
48 PERF_RECORD_IRQ,
49 PERF_RECORD_GROUP,
50};
51
52/**
53 * struct hw_perf_counter - performance counter hardware details
54 */
55struct hw_perf_counter {
56 u64 config;
57 unsigned long config_base;
58 unsigned long counter_base;
59 int nmi;
60 unsigned int idx;
61 u64 prev_count;
62 s32 next_count;
63 u64 irq_period;
64};
65
66/*
67 * Hardcoded buffer length limit for now, for IRQ-fed events:
68 */
69#define PERF_DATA_BUFLEN 2048
70
71/**
72 * struct perf_data - performance counter IRQ data sampling ...
73 */
74struct perf_data {
75 int len;
76 int rd_idx;
77 int overrun;
78 u8 data[PERF_DATA_BUFLEN];
79};
80
81/**
82 * struct perf_counter - performance counter kernel representation:
83 */
84struct perf_counter {
85 struct list_head list;
86 int active;
87#if BITS_PER_LONG == 64
88 atomic64_t count;
89#else
90 atomic_t count32[2];
91#endif
92 u64 __irq_period;
93
94 struct hw_perf_counter hw;
95
96 struct perf_counter_context *ctx;
97 struct task_struct *task;
98
99 /*
100 * Protect attach/detach:
101 */
102 struct mutex mutex;
103
104 int oncpu;
105 int cpu;
106
107 s32 hw_event_type;
108 enum perf_record_type record_type;
109
110 /* read() / irq related data */
111 wait_queue_head_t waitq;
112 /* optional: for NMIs */
113 int wakeup_pending;
114 struct perf_data *irqdata;
115 struct perf_data *usrdata;
116 struct perf_data data[2];
117};
118
119/**
120 * struct perf_counter_context - counter context structure
121 *
122 * Used as a container for task counters and CPU counters as well:
123 */
124struct perf_counter_context {
125#ifdef CONFIG_PERF_COUNTERS
126 /*
127 * Protect the list of counters:
128 */
129 spinlock_t lock;
130 struct list_head counters;
131 int nr_counters;
132 int nr_active;
133 struct task_struct *task;
134#endif
135};
136
137/**
138 * struct perf_counter_cpu_context - per cpu counter context structure
139 */
140struct perf_cpu_context {
141 struct perf_counter_context ctx;
142 struct perf_counter_context *task_ctx;
143 int active_oncpu;
144 int max_pertask;
145};
146
147/*
148 * Set by architecture code:
149 */
150extern int perf_max_counters;
151
152#ifdef CONFIG_PERF_COUNTERS
153extern void perf_counter_task_sched_in(struct task_struct *task, int cpu);
154extern void perf_counter_task_sched_out(struct task_struct *task, int cpu);
155extern void perf_counter_task_tick(struct task_struct *task, int cpu);
156extern void perf_counter_init_task(struct task_struct *task);
157extern void perf_counter_notify(struct pt_regs *regs);
158extern void perf_counter_print_debug(void);
159#else
160static inline void
161perf_counter_task_sched_in(struct task_struct *task, int cpu) { }
162static inline void
163perf_counter_task_sched_out(struct task_struct *task, int cpu) { }
164static inline void
165perf_counter_task_tick(struct task_struct *task, int cpu) { }
166static inline void perf_counter_init_task(struct task_struct *task) { }
167static inline void perf_counter_notify(struct pt_regs *regs) { }
168static inline void perf_counter_print_debug(void) { }
169#endif
170
171#endif /* _LINUX_PERF_COUNTER_H */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 55e30d114477..4c530278391b 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -71,6 +71,7 @@ struct sched_param {
71#include <linux/fs_struct.h> 71#include <linux/fs_struct.h>
72#include <linux/compiler.h> 72#include <linux/compiler.h>
73#include <linux/completion.h> 73#include <linux/completion.h>
74#include <linux/perf_counter.h>
74#include <linux/pid.h> 75#include <linux/pid.h>
75#include <linux/percpu.h> 76#include <linux/percpu.h>
76#include <linux/topology.h> 77#include <linux/topology.h>
@@ -1326,6 +1327,7 @@ struct task_struct {
1326 struct list_head pi_state_list; 1327 struct list_head pi_state_list;
1327 struct futex_pi_state *pi_state_cache; 1328 struct futex_pi_state *pi_state_cache;
1328#endif 1329#endif
1330 struct perf_counter_context perf_counter_ctx;
1329#ifdef CONFIG_NUMA 1331#ifdef CONFIG_NUMA
1330 struct mempolicy *mempolicy; 1332 struct mempolicy *mempolicy;
1331 short il_next; 1333 short il_next;
@@ -2285,6 +2287,13 @@ static inline void inc_syscw(struct task_struct *tsk)
2285#define TASK_SIZE_OF(tsk) TASK_SIZE 2287#define TASK_SIZE_OF(tsk) TASK_SIZE
2286#endif 2288#endif
2287 2289
2290/*
2291 * Call the function if the target task is executing on a CPU right now:
2292 */
2293extern void task_oncpu_function_call(struct task_struct *p,
2294 void (*func) (void *info), void *info);
2295
2296
2288#ifdef CONFIG_MM_OWNER 2297#ifdef CONFIG_MM_OWNER
2289extern void mm_update_next_owner(struct mm_struct *mm); 2298extern void mm_update_next_owner(struct mm_struct *mm);
2290extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p); 2299extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p);
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 04fb47bfb920..6cce728a6263 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -624,4 +624,10 @@ asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len);
624 624
625int kernel_execve(const char *filename, char *const argv[], char *const envp[]); 625int kernel_execve(const char *filename, char *const argv[], char *const envp[]);
626 626
627asmlinkage int
628sys_perf_counter_open(u32 hw_event_type,
629 u32 hw_event_period,
630 u32 record_type,
631 pid_t pid,
632 int cpu);
627#endif 633#endif
generated by cgit v1.2.2 (git 2.25.0) at 2026-04-06 05:25:27 -0400