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 #ifdef __sh__
  23 #include "../../arch/sh/include/asm/unistd.h"
  24 #if defined(__SH4A__) || defined(__SH5__)
  25 # define rmb()          asm volatile("synco" ::: "memory")
  26 #else
  27 # define rmb()          asm volatile("" ::: "memory")
  28 #endif
  29 #define cpu_relax()     asm volatile("" ::: "memory")
  30 #endif
  31
  32 #include <time.h>
  33 #include <unistd.h>
  34 #include <sys/types.h>
  35 #include <sys/syscall.h>
  36
  37 #include "../../include/linux/perf_counter.h"
  38 #include "util/types.h"
  39
  40 /*
  41  * prctl(PR_TASK_PERF_COUNTERS_DISABLE) will (cheaply) disable all
  42  * counters in the current task.
  43  */
  44 #define PR_TASK_PERF_COUNTERS_DISABLE   31
  45 #define PR_TASK_PERF_COUNTERS_ENABLE    32
  46
  47 #ifndef NSEC_PER_SEC
  48 # define NSEC_PER_SEC                   1000000000ULL
  49 #endif
  50
  51 static inline unsigned long long rdclock(void)
  52 {
  53         struct timespec ts;
  54
  55         clock_gettime(CLOCK_MONOTONIC, &ts);
  56         return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
  57 }
  58
  59 /*
  60  * Pick up some kernel type conventions:
  61  */
  62 #define __user
  63 #define asmlinkage
  64
  65 #define unlikely(x)     __builtin_expect(!!(x), 0)
  66 #define min(x, y) ({                            \
  67         typeof(x) _min1 = (x);                  \
  68         typeof(y) _min2 = (y);                  \
  69         (void) (&_min1 == &_min2);              \
  70         _min1 < _min2 ? _min1 : _min2; })
  71
  72 static inline int
  73 sys_perf_counter_open(struct perf_counter_attr *attr,
  74                       pid_t pid, int cpu, int group_fd,
  75                       unsigned long flags)
  76 {
  77         attr->size = sizeof(*attr);
  78         return syscall(__NR_perf_counter_open, attr, pid, cpu,
  79                        group_fd, flags);
  80 }
  81
  82 #define MAX_COUNTERS                    256
  83 #define MAX_NR_CPUS                     256
  84
  85 struct ip_callchain {
  86         u64 nr;
  87         u64 ips[0];
  88 };
  89
  90 #endif