Root/tools/perf/perf.h

Source at commit ec7cab4cbb721bff91ec924ec691efd8daf36579 created 9 years 7 months ago.
By Maarten ter Huurne, MIPS: JZ4740: A320: Updated quickstart documentation.
1#ifndef _PERF_PERF_H
2#define _PERF_PERF_H
3
4struct winsize;
5
6void get_term_dimensions(struct winsize *ws);
7
8#if defined(__i386__)
9#include "../../arch/x86/include/asm/unistd.h"
10#define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
11#define cpu_relax() asm volatile("rep; nop" ::: "memory");
12#endif
13
14#if defined(__x86_64__)
15#include "../../arch/x86/include/asm/unistd.h"
16#define rmb() asm volatile("lfence" ::: "memory")
17#define cpu_relax() asm volatile("rep; nop" ::: "memory");
18#endif
19
20#ifdef __powerpc__
21#include "../../arch/powerpc/include/asm/unistd.h"
22#define rmb() asm volatile ("sync" ::: "memory")
23#define cpu_relax() asm volatile ("" ::: "memory");
24#endif
25
26#ifdef __s390__
27#include "../../arch/s390/include/asm/unistd.h"
28#define rmb() asm volatile("bcr 15,0" ::: "memory")
29#define cpu_relax() asm volatile("" ::: "memory");
30#endif
31
32#ifdef __sh__
33#include "../../arch/sh/include/asm/unistd.h"
34#if defined(__SH4A__) || defined(__SH5__)
35# define rmb() asm volatile("synco" ::: "memory")
36#else
37# define rmb() asm volatile("" ::: "memory")
38#endif
39#define cpu_relax() asm volatile("" ::: "memory")
40#endif
41
42#ifdef __hppa__
43#include "../../arch/parisc/include/asm/unistd.h"
44#define rmb() asm volatile("" ::: "memory")
45#define cpu_relax() asm volatile("" ::: "memory");
46#endif
47
48#ifdef __sparc__
49#include "../../arch/sparc/include/asm/unistd.h"
50#define rmb() asm volatile("":::"memory")
51#define cpu_relax() asm volatile("":::"memory")
52#endif
53
54#ifdef __alpha__
55#include "../../arch/alpha/include/asm/unistd.h"
56#define rmb() asm volatile("mb" ::: "memory")
57#define cpu_relax() asm volatile("" ::: "memory")
58#endif
59
60#ifdef __ia64__
61#include "../../arch/ia64/include/asm/unistd.h"
62#define rmb() asm volatile ("mf" ::: "memory")
63#define cpu_relax() asm volatile ("hint @pause" ::: "memory")
64#endif
65
66#ifdef __arm__
67#include "../../arch/arm/include/asm/unistd.h"
68/*
69 * Use the __kuser_memory_barrier helper in the CPU helper page. See
70 * arch/arm/kernel/entry-armv.S in the kernel source for details.
71 */
72#define rmb() ((void(*)(void))0xffff0fa0)()
73#define cpu_relax() asm volatile("":::"memory")
74#endif
75
76#ifdef __mips__
77#include "../../arch/mips/include/asm/unistd.h"
78#define rmb() asm volatile( \
79                ".set mips2\n\t" \
80                "sync\n\t" \
81                ".set mips0" \
82                : /* no output */ \
83                : /* no input */ \
84                : "memory")
85#define cpu_relax() asm volatile("" ::: "memory")
86#endif
87
88#include <time.h>
89#include <unistd.h>
90#include <sys/types.h>
91#include <sys/syscall.h>
92
93#include "../../include/linux/perf_event.h"
94#include "util/types.h"
95#include <stdbool.h>
96
97struct perf_mmap {
98    void *base;
99    int mask;
100    unsigned int prev;
101};
102
103static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
104{
105    struct perf_event_mmap_page *pc = mm->base;
106    int head = pc->data_head;
107    rmb();
108    return head;
109}
110
111static inline void perf_mmap__write_tail(struct perf_mmap *md,
112                     unsigned long tail)
113{
114    struct perf_event_mmap_page *pc = md->base;
115
116    /*
117     * ensure all reads are done before we write the tail out.
118     */
119    /* mb(); */
120    pc->data_tail = tail;
121}
122
123/*
124 * prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all
125 * counters in the current task.
126 */
127#define PR_TASK_PERF_EVENTS_DISABLE 31
128#define PR_TASK_PERF_EVENTS_ENABLE 32
129
130#ifndef NSEC_PER_SEC
131# define NSEC_PER_SEC 1000000000ULL
132#endif
133
134static inline unsigned long long rdclock(void)
135{
136    struct timespec ts;
137
138    clock_gettime(CLOCK_MONOTONIC, &ts);
139    return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
140}
141
142/*
143 * Pick up some kernel type conventions:
144 */
145#define __user
146#define asmlinkage
147
148#define unlikely(x) __builtin_expect(!!(x), 0)
149#define min(x, y) ({ \
150    typeof(x) _min1 = (x); \
151    typeof(y) _min2 = (y); \
152    (void) (&_min1 == &_min2); \
153    _min1 < _min2 ? _min1 : _min2; })
154
155static inline int
156sys_perf_event_open(struct perf_event_attr *attr,
157              pid_t pid, int cpu, int group_fd,
158              unsigned long flags)
159{
160    attr->size = sizeof(*attr);
161    return syscall(__NR_perf_event_open, attr, pid, cpu,
162               group_fd, flags);
163}
164
165#define MAX_COUNTERS 256
166#define MAX_NR_CPUS 256
167
168struct ip_callchain {
169    u64 nr;
170    u64 ips[0];
171};
172
173extern bool perf_host, perf_guest;
174
175#endif
176

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