tools/perf/perf.h

   1 #ifndef _PERF_PERF_H
   2 #define _PERF_PERF_H
   3
   4 #if defined(__x86_64__) || defined(__i386__)
   5 #include "../../arch/x86/include/asm/unistd.h"
   6 #define rmb()           asm volatile("lfence" ::: "memory")
   7 #define cpu_relax()     asm volatile("rep; nop" ::: "memory");
   8 #endif
   9
  10 #ifdef __powerpc__
  11 #include "../../arch/powerpc/include/asm/unistd.h"
  12 #define rmb()           asm volatile ("sync" ::: "memory")
  13 #define cpu_relax()     asm volatile ("" ::: "memory");
  14 #endif
  15
  16 #include <time.h>
  17 #include <unistd.h>
  18 #include <sys/types.h>
  19 #include <sys/syscall.h>
  20
  21 #include "../../include/linux/perf_counter.h"
  22 #include "types.h"
  23
  24 /*
  25  * prctl(PR_TASK_PERF_COUNTERS_DISABLE) will (cheaply) disable all
  26  * counters in the current task.
  27  */
  28 #define PR_TASK_PERF_COUNTERS_DISABLE   31
  29 #define PR_TASK_PERF_COUNTERS_ENABLE    32
  30
  31 #ifndef NSEC_PER_SEC
  32 # define NSEC_PER_SEC                   1000000000ULL
  33 #endif
  34
  35 static inline unsigned long long rdclock(void)
  36 {
  37         struct timespec ts;
  38
  39         clock_gettime(CLOCK_MONOTONIC, &ts);
  40         return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
  41 }
  42
  43 /*
  44  * Pick up some kernel type conventions:
  45  */
  46 #define __user
  47 #define asmlinkage
  48
  49 #define unlikely(x)     __builtin_expect(!!(x), 0)
  50 #define min(x, y) ({                            \
  51         typeof(x) _min1 = (x);                  \
  52         typeof(y) _min2 = (y);                  \
  53         (void) (&_min1 == &_min2);              \
  54         _min1 < _min2 ? _min1 : _min2; })
  55
  56 static inline int
  57 sys_perf_counter_open(struct perf_counter_attr *attr,
  58                       pid_t pid, int cpu, int group_fd,
  59                       unsigned long flags)
  60 {
  61         attr->size = sizeof(*attr);
  62         return syscall(__NR_perf_counter_open, attr, pid, cpu,
  63                        group_fd, flags);
  64 }
  65
  66 #define MAX_COUNTERS                    256
  67 #define MAX_NR_CPUS                     256
  68
  69 struct perf_file_header {
  70         u64     version;
  71         u64     sample_type;
  72         u64     data_size;
  73 };
  74
  75 #endif