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
  23 /*
  24  * prctl(PR_TASK_PERF_COUNTERS_DISABLE) will (cheaply) disable all
  25  * counters in the current task.
  26  */
  27 #define PR_TASK_PERF_COUNTERS_DISABLE   31
  28 #define PR_TASK_PERF_COUNTERS_ENABLE    32
  29
  30 #ifndef NSEC_PER_SEC
  31 # define NSEC_PER_SEC                   1000000000ULL
  32 #endif
  33
  34 static inline unsigned long long rdclock(void)
  35 {
  36         struct timespec ts;
  37
  38         clock_gettime(CLOCK_MONOTONIC, &ts);
  39         return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
  40 }
  41
  42 /*
  43  * Pick up some kernel type conventions:
  44  */
  45 #define __user
  46 #define asmlinkage
  47
  48 #define unlikely(x)     __builtin_expect(!!(x), 0)
  49 #define min(x, y) ({                            \
  50         typeof(x) _min1 = (x);                  \
  51         typeof(y) _min2 = (y);                  \
  52         (void) (&_min1 == &_min2);              \
  53         _min1 < _min2 ? _min1 : _min2; })
  54
  55 static inline int
  56 sys_perf_counter_open(struct perf_counter_attr *attr,
  57                       pid_t pid, int cpu, int group_fd,
  58                       unsigned long flags)
  59 {
  60         attr->size = sizeof(*attr);
  61         return syscall(__NR_perf_counter_open, attr, pid, cpu,
  62                        group_fd, flags);
  63 }
  64
  65 #define MAX_COUNTERS                    256
  66 #define MAX_NR_CPUS                     256
  67
  68 #endif