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-rw-r--r--include/linux/init_task.h11
-rw-r--r--include/linux/kernel_stat.h8
-rw-r--r--include/linux/perf_counter.h305
-rw-r--r--include/linux/prctl.h3
-rw-r--r--include/linux/sched.h14
-rw-r--r--include/linux/syscalls.h5
6 files changed, 345 insertions, 1 deletions
diff --git a/include/linux/init_task.h b/include/linux/init_task.h
index af1de95e711e..219748d00262 100644
--- a/include/linux/init_task.h
+++ b/include/linux/init_task.h
@@ -120,6 +120,16 @@ extern struct group_info init_groups;
120 120
121extern struct cred init_cred; 121extern struct cred init_cred;
122 122
123#ifdef CONFIG_PERF_COUNTERS
124# define INIT_PERF_COUNTERS(tsk) \
125 .perf_counter_ctx.counter_list = \
126 LIST_HEAD_INIT(tsk.perf_counter_ctx.counter_list), \
127 .perf_counter_ctx.lock = \
128 __SPIN_LOCK_UNLOCKED(tsk.perf_counter_ctx.lock),
129#else
130# define INIT_PERF_COUNTERS(tsk)
131#endif
132
123/* 133/*
124 * INIT_TASK is used to set up the first task table, touch at 134 * INIT_TASK is used to set up the first task table, touch at
125 * your own risk!. Base=0, limit=0x1fffff (=2MB) 135 * your own risk!. Base=0, limit=0x1fffff (=2MB)
@@ -185,6 +195,7 @@ extern struct cred init_cred;
185 INIT_IDS \ 195 INIT_IDS \
186 INIT_TRACE_IRQFLAGS \ 196 INIT_TRACE_IRQFLAGS \
187 INIT_LOCKDEP \ 197 INIT_LOCKDEP \
198 INIT_PERF_COUNTERS(tsk) \
188} 199}
189 200
190 201
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 0c8b89f28a95..b6d2887a5d88 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -81,7 +81,15 @@ static inline unsigned int kstat_irqs(unsigned int irq)
81 return sum; 81 return sum;
82} 82}
83 83
84
85/*
86 * Lock/unlock the current runqueue - to extract task statistics:
87 */
88extern void curr_rq_lock_irq_save(unsigned long *flags);
89extern void curr_rq_unlock_irq_restore(unsigned long *flags);
90extern unsigned long long __task_delta_exec(struct task_struct *tsk, int update);
84extern unsigned long long task_delta_exec(struct task_struct *); 91extern unsigned long long task_delta_exec(struct task_struct *);
92
85extern void account_user_time(struct task_struct *, cputime_t, cputime_t); 93extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
86extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t); 94extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
87extern void account_steal_time(cputime_t); 95extern void account_steal_time(cputime_t);
diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
new file mode 100644
index 000000000000..dde564517b66
--- /dev/null
+++ b/include/linux/perf_counter.h
@@ -0,0 +1,305 @@
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 <linux/types.h>
17#include <linux/ioctl.h>
18
19/*
20 * User-space ABI bits:
21 */
22
23/*
24 * Generalized performance counter event types, used by the hw_event.type
25 * parameter of the sys_perf_counter_open() syscall:
26 */
27enum hw_event_types {
28 /*
29 * Common hardware events, generalized by the kernel:
30 */
31 PERF_COUNT_CPU_CYCLES = 0,
32 PERF_COUNT_INSTRUCTIONS = 1,
33 PERF_COUNT_CACHE_REFERENCES = 2,
34 PERF_COUNT_CACHE_MISSES = 3,
35 PERF_COUNT_BRANCH_INSTRUCTIONS = 4,
36 PERF_COUNT_BRANCH_MISSES = 5,
37 PERF_COUNT_BUS_CYCLES = 6,
38
39 PERF_HW_EVENTS_MAX = 7,
40
41 /*
42 * Special "software" counters provided by the kernel, even if
43 * the hardware does not support performance counters. These
44 * counters measure various physical and sw events of the
45 * kernel (and allow the profiling of them as well):
46 */
47 PERF_COUNT_CPU_CLOCK = -1,
48 PERF_COUNT_TASK_CLOCK = -2,
49 PERF_COUNT_PAGE_FAULTS = -3,
50 PERF_COUNT_CONTEXT_SWITCHES = -4,
51 PERF_COUNT_CPU_MIGRATIONS = -5,
52
53 PERF_SW_EVENTS_MIN = -6,
54};
55
56/*
57 * IRQ-notification data record type:
58 */
59enum perf_counter_record_type {
60 PERF_RECORD_SIMPLE = 0,
61 PERF_RECORD_IRQ = 1,
62 PERF_RECORD_GROUP = 2,
63};
64
65/*
66 * Hardware event to monitor via a performance monitoring counter:
67 */
68struct perf_counter_hw_event {
69 __s64 type;
70
71 __u64 irq_period;
72 __u64 record_type;
73 __u64 read_format;
74
75 __u64 disabled : 1, /* off by default */
76 nmi : 1, /* NMI sampling */
77 raw : 1, /* raw event type */
78 inherit : 1, /* children inherit it */
79 pinned : 1, /* must always be on PMU */
80 exclusive : 1, /* only group on PMU */
81 exclude_user : 1, /* don't count user */
82 exclude_kernel : 1, /* ditto kernel */
83 exclude_hv : 1, /* ditto hypervisor */
84 exclude_idle : 1, /* don't count when idle */
85
86 __reserved_1 : 54;
87
88 __u32 extra_config_len;
89 __u32 __reserved_4;
90
91 __u64 __reserved_2;
92 __u64 __reserved_3;
93};
94
95/*
96 * Ioctls that can be done on a perf counter fd:
97 */
98#define PERF_COUNTER_IOC_ENABLE _IO('$', 0)
99#define PERF_COUNTER_IOC_DISABLE _IO('$', 1)
100
101#ifdef __KERNEL__
102/*
103 * Kernel-internal data types and definitions:
104 */
105
106#ifdef CONFIG_PERF_COUNTERS
107# include <asm/perf_counter.h>
108#endif
109
110#include <linux/list.h>
111#include <linux/mutex.h>
112#include <linux/rculist.h>
113#include <linux/rcupdate.h>
114#include <linux/spinlock.h>
115#include <asm/atomic.h>
116
117struct task_struct;
118
119/**
120 * struct hw_perf_counter - performance counter hardware details:
121 */
122struct hw_perf_counter {
123#ifdef CONFIG_PERF_COUNTERS
124 u64 config;
125 unsigned long config_base;
126 unsigned long counter_base;
127 int nmi;
128 unsigned int idx;
129 atomic64_t prev_count;
130 u64 irq_period;
131 atomic64_t period_left;
132#endif
133};
134
135/*
136 * Hardcoded buffer length limit for now, for IRQ-fed events:
137 */
138#define PERF_DATA_BUFLEN 2048
139
140/**
141 * struct perf_data - performance counter IRQ data sampling ...
142 */
143struct perf_data {
144 int len;
145 int rd_idx;
146 int overrun;
147 u8 data[PERF_DATA_BUFLEN];
148};
149
150struct perf_counter;
151
152/**
153 * struct hw_perf_counter_ops - performance counter hw ops
154 */
155struct hw_perf_counter_ops {
156 int (*enable) (struct perf_counter *counter);
157 void (*disable) (struct perf_counter *counter);
158 void (*read) (struct perf_counter *counter);
159};
160
161/**
162 * enum perf_counter_active_state - the states of a counter
163 */
164enum perf_counter_active_state {
165 PERF_COUNTER_STATE_ERROR = -2,
166 PERF_COUNTER_STATE_OFF = -1,
167 PERF_COUNTER_STATE_INACTIVE = 0,
168 PERF_COUNTER_STATE_ACTIVE = 1,
169};
170
171struct file;
172
173/**
174 * struct perf_counter - performance counter kernel representation:
175 */
176struct perf_counter {
177#ifdef CONFIG_PERF_COUNTERS
178 struct list_head list_entry;
179 struct list_head sibling_list;
180 struct perf_counter *group_leader;
181 const struct hw_perf_counter_ops *hw_ops;
182
183 enum perf_counter_active_state state;
184 enum perf_counter_active_state prev_state;
185 atomic64_t count;
186
187 struct perf_counter_hw_event hw_event;
188 struct hw_perf_counter hw;
189
190 struct perf_counter_context *ctx;
191 struct task_struct *task;
192 struct file *filp;
193
194 struct perf_counter *parent;
195 struct list_head child_list;
196
197 /*
198 * Protect attach/detach and child_list:
199 */
200 struct mutex mutex;
201
202 int oncpu;
203 int cpu;
204
205 /* read() / irq related data */
206 wait_queue_head_t waitq;
207 /* optional: for NMIs */
208 int wakeup_pending;
209 struct perf_data *irqdata;
210 struct perf_data *usrdata;
211 struct perf_data data[2];
212#endif
213};
214
215/**
216 * struct perf_counter_context - counter context structure
217 *
218 * Used as a container for task counters and CPU counters as well:
219 */
220struct perf_counter_context {
221#ifdef CONFIG_PERF_COUNTERS
222 /*
223 * Protect the states of the counters in the list,
224 * nr_active, and the list:
225 */
226 spinlock_t lock;
227 /*
228 * Protect the list of counters. Locking either mutex or lock
229 * is sufficient to ensure the list doesn't change; to change
230 * the list you need to lock both the mutex and the spinlock.
231 */
232 struct mutex mutex;
233
234 struct list_head counter_list;
235 int nr_counters;
236 int nr_active;
237 int is_active;
238 struct task_struct *task;
239#endif
240};
241
242/**
243 * struct perf_counter_cpu_context - per cpu counter context structure
244 */
245struct perf_cpu_context {
246 struct perf_counter_context ctx;
247 struct perf_counter_context *task_ctx;
248 int active_oncpu;
249 int max_pertask;
250 int exclusive;
251};
252
253/*
254 * Set by architecture code:
255 */
256extern int perf_max_counters;
257
258#ifdef CONFIG_PERF_COUNTERS
259extern const struct hw_perf_counter_ops *
260hw_perf_counter_init(struct perf_counter *counter);
261
262extern void perf_counter_task_sched_in(struct task_struct *task, int cpu);
263extern void perf_counter_task_sched_out(struct task_struct *task, int cpu);
264extern void perf_counter_task_tick(struct task_struct *task, int cpu);
265extern void perf_counter_init_task(struct task_struct *child);
266extern void perf_counter_exit_task(struct task_struct *child);
267extern void perf_counter_notify(struct pt_regs *regs);
268extern void perf_counter_print_debug(void);
269extern void perf_counter_unthrottle(void);
270extern u64 hw_perf_save_disable(void);
271extern void hw_perf_restore(u64 ctrl);
272extern int perf_counter_task_disable(void);
273extern int perf_counter_task_enable(void);
274extern int hw_perf_group_sched_in(struct perf_counter *group_leader,
275 struct perf_cpu_context *cpuctx,
276 struct perf_counter_context *ctx, int cpu);
277
278/*
279 * Return 1 for a software counter, 0 for a hardware counter
280 */
281static inline int is_software_counter(struct perf_counter *counter)
282{
283 return !counter->hw_event.raw && counter->hw_event.type < 0;
284}
285
286#else
287static inline void
288perf_counter_task_sched_in(struct task_struct *task, int cpu) { }
289static inline void
290perf_counter_task_sched_out(struct task_struct *task, int cpu) { }
291static inline void
292perf_counter_task_tick(struct task_struct *task, int cpu) { }
293static inline void perf_counter_init_task(struct task_struct *child) { }
294static inline void perf_counter_exit_task(struct task_struct *child) { }
295static inline void perf_counter_notify(struct pt_regs *regs) { }
296static inline void perf_counter_print_debug(void) { }
297static inline void perf_counter_unthrottle(void) { }
298static inline void hw_perf_restore(u64 ctrl) { }
299static inline u64 hw_perf_save_disable(void) { return 0; }
300static inline int perf_counter_task_disable(void) { return -EINVAL; }
301static inline int perf_counter_task_enable(void) { return -EINVAL; }
302#endif
303
304#endif /* __KERNEL__ */
305#endif /* _LINUX_PERF_COUNTER_H */
diff --git a/include/linux/prctl.h b/include/linux/prctl.h
index 48d887e3c6e7..b00df4c79c63 100644
--- a/include/linux/prctl.h
+++ b/include/linux/prctl.h
@@ -85,4 +85,7 @@
85#define PR_SET_TIMERSLACK 29 85#define PR_SET_TIMERSLACK 29
86#define PR_GET_TIMERSLACK 30 86#define PR_GET_TIMERSLACK 30
87 87
88#define PR_TASK_PERF_COUNTERS_DISABLE 31
89#define PR_TASK_PERF_COUNTERS_ENABLE 32
90
88#endif /* _LINUX_PRCTL_H */ 91#endif /* _LINUX_PRCTL_H */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index b94f3541f67b..75b2fc5306d8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -71,6 +71,7 @@ struct sched_param {
71#include <linux/path.h> 71#include <linux/path.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>
@@ -137,6 +138,8 @@ extern unsigned long nr_running(void);
137extern unsigned long nr_uninterruptible(void); 138extern unsigned long nr_uninterruptible(void);
138extern unsigned long nr_active(void); 139extern unsigned long nr_active(void);
139extern unsigned long nr_iowait(void); 140extern unsigned long nr_iowait(void);
141extern u64 cpu_nr_switches(int cpu);
142extern u64 cpu_nr_migrations(int cpu);
140 143
141extern unsigned long get_parent_ip(unsigned long addr); 144extern unsigned long get_parent_ip(unsigned long addr);
142 145
@@ -1048,9 +1051,10 @@ struct sched_entity {
1048 u64 last_wakeup; 1051 u64 last_wakeup;
1049 u64 avg_overlap; 1052 u64 avg_overlap;
1050 1053
1054 u64 nr_migrations;
1055
1051 u64 start_runtime; 1056 u64 start_runtime;
1052 u64 avg_wakeup; 1057 u64 avg_wakeup;
1053 u64 nr_migrations;
1054 1058
1055#ifdef CONFIG_SCHEDSTATS 1059#ifdef CONFIG_SCHEDSTATS
1056 u64 wait_start; 1060 u64 wait_start;
@@ -1372,6 +1376,7 @@ struct task_struct {
1372 struct list_head pi_state_list; 1376 struct list_head pi_state_list;
1373 struct futex_pi_state *pi_state_cache; 1377 struct futex_pi_state *pi_state_cache;
1374#endif 1378#endif
1379 struct perf_counter_context perf_counter_ctx;
1375#ifdef CONFIG_NUMA 1380#ifdef CONFIG_NUMA
1376 struct mempolicy *mempolicy; 1381 struct mempolicy *mempolicy;
1377 short il_next; 1382 short il_next;
@@ -2380,6 +2385,13 @@ static inline void inc_syscw(struct task_struct *tsk)
2380#define TASK_SIZE_OF(tsk) TASK_SIZE 2385#define TASK_SIZE_OF(tsk) TASK_SIZE
2381#endif 2386#endif
2382 2387
2388/*
2389 * Call the function if the target task is executing on a CPU right now:
2390 */
2391extern void task_oncpu_function_call(struct task_struct *p,
2392 void (*func) (void *info), void *info);
2393
2394
2383#ifdef CONFIG_MM_OWNER 2395#ifdef CONFIG_MM_OWNER
2384extern void mm_update_next_owner(struct mm_struct *mm); 2396extern void mm_update_next_owner(struct mm_struct *mm);
2385extern void mm_init_owner(struct mm_struct *mm, struct task_struct *p); 2397extern 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 6470f74074af..471143bf2aae 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -55,6 +55,7 @@ struct compat_timeval;
55struct robust_list_head; 55struct robust_list_head;
56struct getcpu_cache; 56struct getcpu_cache;
57struct old_linux_dirent; 57struct old_linux_dirent;
58struct perf_counter_hw_event;
58 59
59#include <linux/types.h> 60#include <linux/types.h>
60#include <linux/aio_abi.h> 61#include <linux/aio_abi.h>
@@ -754,4 +755,8 @@ asmlinkage long sys_pipe(int __user *);
754 755
755int kernel_execve(const char *filename, char *const argv[], char *const envp[]); 756int kernel_execve(const char *filename, char *const argv[], char *const envp[]);
756 757
758
759asmlinkage long sys_perf_counter_open(
760 const struct perf_counter_hw_event __user *hw_event_uptr,
761 pid_t pid, int cpu, int group_fd, unsigned long flags);
757#endif 762#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-06-01 11:48:50 -0400