tools/perf/perf.h

   1 #ifndef _PERF_PERF_H
   2 #define _PERF_PERF_H
   3
   4 struct winsize;
   5
   6 void 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 #define CPUINFO_PROC    "model name"
  13 #endif
  14
  15 #if defined(__x86_64__)
  16 #include "../../arch/x86/include/asm/unistd.h"
  17 #define rmb()           asm volatile("lfence" ::: "memory")
  18 #define cpu_relax()     asm volatile("rep; nop" ::: "memory");
  19 #define CPUINFO_PROC    "model name"
  20 #endif
  21
  22 #ifdef __powerpc__
  23 #include "../../arch/powerpc/include/asm/unistd.h"
  24 #define rmb()           asm volatile ("sync" ::: "memory")
  25 #define cpu_relax()     asm volatile ("" ::: "memory");
  26 #define CPUINFO_PROC    "cpu"
  27 #endif
  28
  29 #ifdef __s390__
  30 #include "../../arch/s390/include/asm/unistd.h"
  31 #define rmb()           asm volatile("bcr 15,0" ::: "memory")
  32 #define cpu_relax()     asm volatile("" ::: "memory");
  33 #endif
  34
  35 #ifdef __sh__
  36 #include "../../arch/sh/include/asm/unistd.h"
  37 #if defined(__SH4A__) || defined(__SH5__)
  38 # define rmb()          asm volatile("synco" ::: "memory")
  39 #else
  40 # define rmb()          asm volatile("" ::: "memory")
  41 #endif
  42 #define cpu_relax()     asm volatile("" ::: "memory")
  43 #define CPUINFO_PROC    "cpu type"
  44 #endif
  45
  46 #ifdef __hppa__
  47 #include "../../arch/parisc/include/asm/unistd.h"
  48 #define rmb()           asm volatile("" ::: "memory")
  49 #define cpu_relax()     asm volatile("" ::: "memory");
  50 #define CPUINFO_PROC    "cpu"
  51 #endif
  52
  53 #ifdef __sparc__
  54 #include "../../arch/sparc/include/asm/unistd.h"
  55 #define rmb()           asm volatile("":::"memory")
  56 #define cpu_relax()     asm volatile("":::"memory")
  57 #define CPUINFO_PROC    "cpu"
  58 #endif
  59
  60 #ifdef __alpha__
  61 #include "../../arch/alpha/include/asm/unistd.h"
  62 #define rmb()           asm volatile("mb" ::: "memory")
  63 #define cpu_relax()     asm volatile("" ::: "memory")
  64 #define CPUINFO_PROC    "cpu model"
  65 #endif
  66
  67 #ifdef __ia64__
  68 #include "../../arch/ia64/include/asm/unistd.h"
  69 #define rmb()           asm volatile ("mf" ::: "memory")
  70 #define cpu_relax()     asm volatile ("hint @pause" ::: "memory")
  71 #define CPUINFO_PROC    "model name"
  72 #endif
  73
  74 #ifdef __arm__
  75 #include "../../arch/arm/include/asm/unistd.h"
  76 /*
  77  * Use the __kuser_memory_barrier helper in the CPU helper page. See
  78  * arch/arm/kernel/entry-armv.S in the kernel source for details.
  79  */
  80 #define rmb()           ((void(*)(void))0xffff0fa0)()
  81 #define cpu_relax()     asm volatile("":::"memory")
  82 #define CPUINFO_PROC    "Processor"
  83 #endif
  84
  85 #ifdef __mips__
  86 #include "../../arch/mips/include/asm/unistd.h"
  87 #define rmb()           asm volatile(                                   \
  88                                 ".set   mips2\n\t"                      \
  89                                 "sync\n\t"                              \
  90                                 ".set   mips0"                          \
  91                                 : /* no output */                       \
  92                                 : /* no input */                        \
  93                                 : "memory")
  94 #define cpu_relax()     asm volatile("" ::: "memory")
  95 #define CPUINFO_PROC    "cpu model"
  96 #endif
  97
  98 #include <time.h>
  99 #include <unistd.h>
 100 #include <sys/types.h>
 101 #include <sys/syscall.h>
 102
 103 #include "../../include/linux/perf_event.h"
 104 #include "util/types.h"
 105 #include <stdbool.h>
 106
 107 struct perf_mmap {
 108         void                    *base;
 109         int                     mask;
 110         unsigned int            prev;
 111 };
 112
 113 static inline unsigned int perf_mmap__read_head(struct perf_mmap *mm)
 114 {
 115         struct perf_event_mmap_page *pc = mm->base;
 116         int head = pc->data_head;
 117         rmb();
 118         return head;
 119 }
 120
 121 static inline void perf_mmap__write_tail(struct perf_mmap *md,
 122                                          unsigned long tail)
 123 {
 124         struct perf_event_mmap_page *pc = md->base;
 125
 126         /*
 127          * ensure all reads are done before we write the tail out.
 128          */
 129         /* mb(); */
 130         pc->data_tail = tail;
 131 }
 132
 133 /*
 134  * prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all
 135  * counters in the current task.
 136  */
 137 #define PR_TASK_PERF_EVENTS_DISABLE   31
 138 #define PR_TASK_PERF_EVENTS_ENABLE    32
 139
 140 #ifndef NSEC_PER_SEC
 141 # define NSEC_PER_SEC                   1000000000ULL
 142 #endif
 143
 144 static inline unsigned long long rdclock(void)
 145 {
 146         struct timespec ts;
 147
 148         clock_gettime(CLOCK_MONOTONIC, &ts);
 149         return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
 150 }
 151
 152 /*
 153  * Pick up some kernel type conventions:
 154  */
 155 #define __user
 156 #define asmlinkage
 157
 158 #define unlikely(x)     __builtin_expect(!!(x), 0)
 159 #define min(x, y) ({                            \
 160         typeof(x) _min1 = (x);                  \
 161         typeof(y) _min2 = (y);                  \
 162         (void) (&_min1 == &_min2);              \
 163         _min1 < _min2 ? _min1 : _min2; })
 164
 165 static inline int
 166 sys_perf_event_open(struct perf_event_attr *attr,
 167                       pid_t pid, int cpu, int group_fd,
 168                       unsigned long flags)
 169 {
 170         attr->size = sizeof(*attr);
 171         return syscall(__NR_perf_event_open, attr, pid, cpu,
 172                        group_fd, flags);
 173 }
 174
 175 #define MAX_COUNTERS                    256
 176 #define MAX_NR_CPUS                     256
 177
 178 struct ip_callchain {
 179         u64 nr;
 180         u64 ips[0];
 181 };
 182
 183 extern bool perf_host, perf_guest;
 184 extern const char perf_version_string[];
 185
 186 void pthread__unblock_sigwinch(void);
 187
 188 #endif