aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/perf.h
blob: a5fc660c1f1286512b299342ad3841509a080194 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
#ifndef _PERF_PERF_H
#define _PERF_PERF_H

struct winsize;

void get_term_dimensions(struct winsize *ws);

#if defined(__i386__)
#include "../../arch/x86/include/asm/unistd.h"
#define rmb()		asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
#define cpu_relax()	asm volatile("rep; nop" ::: "memory");
#endif

#if defined(__x86_64__)
#include "../../arch/x86/include/asm/unistd.h"
#define rmb()		asm volatile("lfence" ::: "memory")
#define cpu_relax()	asm volatile("rep; nop" ::: "memory");
#endif

#ifdef __powerpc__
#include "../../arch/powerpc/include/asm/unistd.h"
#define rmb()		asm volatile ("sync" ::: "memory")
#define cpu_relax()	asm volatile ("" ::: "memory");
#endif

#ifdef __s390__
#include "../../arch/s390/include/asm/unistd.h"
#define rmb()		asm volatile("bcr 15,0" ::: "memory")
#define cpu_relax()	asm volatile("" ::: "memory");
#endif

#ifdef __sh__
#include "../../arch/sh/include/asm/unistd.h"
#if defined(__SH4A__) || defined(__SH5__)
# define rmb()		asm volatile("synco" ::: "memory")
#else
# define rmb()		asm volatile("" ::: "memory")
#endif
#define cpu_relax()	asm volatile("" ::: "memory")
#endif

#ifdef __hppa__
#include "../../arch/parisc/include/asm/unistd.h"
#define rmb()		asm volatile("" ::: "memory")
#define cpu_relax()	asm volatile("" ::: "memory");
#endif

#ifdef __sparc__
#include "../../arch/sparc/include/asm/unistd.h"
#define rmb()		asm volatile("":::"memory")
#define cpu_relax()	asm volatile("":::"memory")
#endif

#ifdef __alpha__
#include "../../arch/alpha/include/asm/unistd.h"
#define rmb()		asm volatile("mb" ::: "memory")
#define cpu_relax()	asm volatile("" ::: "memory")
#endif

#ifdef __ia64__
#include "../../arch/ia64/include/asm/unistd.h"
#define rmb()		asm volatile ("mf" ::: "memory")
#define cpu_relax()	asm volatile ("hint @pause" ::: "memory")
#endif

#ifdef __arm__
#include "../../arch/arm/include/asm/unistd.h"
/*
 * Use the __kuser_memory_barrier helper in the CPU helper page. See
 * arch/arm/kernel/entry-armv.S in the kernel source for details.
 */
#define rmb()		((void(*)(void))0xffff0fa0)()
#define cpu_relax()	asm volatile("":::"memory")
#endif

#ifdef __mips__
#include "../../arch/mips/include/asm/unistd.h"
#define rmb()		asm volatile(					\
				".set	mips2\n\t"			\
				"sync\n\t"				\
				".set	mips0"				\
				: /* no output */			\
				: /* no input */			\
				: "memory")
#define cpu_relax()	asm volatile("" ::: "memory")
#endif

#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/syscall.h>

#include "../../include/linux/perf_event.h"
#include "util/types.h"
#include <stdbool.h>

struct perf_mmap {
	void			*base;
	int			mask;
	unsigned int		prev;
};

static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
{
	struct perf_event_mmap_page *pc = mm->base;
	int head = pc->data_head;
	rmb();
	return head;
}

static inline void perf_mmap__write_tail(struct perf_mmap *md,
					 unsigned long tail)
{
	struct perf_event_mmap_page *pc = md->base;

	/*
	 * ensure all reads are done before we write the tail out.
	 */
	/* mb(); */
	pc->data_tail = tail;
}

/*
 * prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all
 * counters in the current task.
 */
#define PR_TASK_PERF_EVENTS_DISABLE   31
#define PR_TASK_PERF_EVENTS_ENABLE    32

#ifndef NSEC_PER_SEC
# define NSEC_PER_SEC			1000000000ULL
#endif

static inline unsigned long long rdclock(void)
{
	struct timespec ts;

	clock_gettime(CLOCK_MONOTONIC, &ts);
	return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
}

/*
 * Pick up some kernel type conventions:
 */
#define __user
#define asmlinkage

#define unlikely(x)	__builtin_expect(!!(x), 0)
#define min(x, y) ({				\
	typeof(x) _min1 = (x);			\
	typeof(y) _min2 = (y);			\
	(void) (&_min1 == &_min2);		\
	_min1 < _min2 ? _min1 : _min2; })

static inline int
sys_perf_event_open(struct perf_event_attr *attr,
		      pid_t pid, int cpu, int group_fd,
		      unsigned long flags)
{
	attr->size = sizeof(*attr);
	return syscall(__NR_perf_event_open, attr, pid, cpu,
		       group_fd, flags);
}

#define MAX_COUNTERS			256
#define MAX_NR_CPUS			256

struct ip_callchain {
	u64 nr;
	u64 ips[0];
};

extern bool perf_host, perf_guest;

#endif