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 #ifdef __s390__
  17 #include "../../arch/s390/include/asm/unistd.h"
  18 #define rmb()           asm volatile("bcr 15,0" ::: "memory")
  19 #define cpu_relax()     asm volatile("" ::: "memory");
  20 #endif
  21
  22 #include <time.h>
  23 #include <unistd.h>
  24 #include <sys/types.h>
  25 #include <sys/syscall.h>
  26
  27 #include "../../include/linux/perf_counter.h"
  28 #include "util/types.h"
  29
  30 /*
  31  * prctl(PR_TASK_PERF_COUNTERS_DISABLE) will (cheaply) disable all
  32  * counters in the current task.
  33  */
  34 #define PR_TASK_PERF_COUNTERS_DISABLE   31
  35 #define PR_TASK_PERF_COUNTERS_ENABLE    32
  36
  37 #ifndef NSEC_PER_SEC
  38 # define NSEC_PER_SEC                   1000000000ULL
  39 #endif
  40
  41 static inline unsigned long long rdclock(void)
  42 {
  43         struct timespec ts;
  44
  45         clock_gettime(CLOCK_MONOTONIC, &ts);
  46         return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
  47 }
  48
  49 /*
  50  * Pick up some kernel type conventions:
  51  */
  52 #define __user
  53 #define asmlinkage
  54
  55 #define __used          __attribute__((__unused__))
  56
  57 #define unlikely(x)     __builtin_expect(!!(x), 0)
  58 #define min(x, y) ({                            \
  59         typeof(x) _min1 = (x);                  \
  60         typeof(y) _min2 = (y);                  \
  61         (void) (&_min1 == &_min2);              \
  62         _min1 < _min2 ? _min1 : _min2; })
  63
  64 static inline int
  65 sys_perf_counter_open(struct perf_counter_attr *attr,
  66                       pid_t pid, int cpu, int group_fd,
  67                       unsigned long flags)
  68 {
  69         attr->size = sizeof(*attr);
  70         return syscall(__NR_perf_counter_open, attr, pid, cpu,
  71                        group_fd, flags);
  72 }
  73
  74 #define MAX_COUNTERS                    256
  75 #define MAX_NR_CPUS                     256
  76
  77 struct ip_callchain {
  78         u64 nr;
  79         u64 ips[0];
  80 };
  81
  82 #endif