tools/perf/util/ftrace.h

   1 #ifndef __PERF_FTRACE_H__
   2 #define __PERF_FTRACE_H__
   3
   4 #include <linux/list.h>
   5
   6 #include "target.h"
   7
   8 struct evlist;
   9
  10 struct perf_ftrace {
  11         struct evlist           *evlist;
  12         struct target           target;
  13         const char              *tracer;
  14         struct list_head        filters;
  15         struct list_head        notrace;
  16         struct list_head        graph_funcs;
  17         struct list_head        nograph_funcs;
  18         unsigned long           percpu_buffer_size;
  19         bool                    inherit;
  20         bool                    use_nsec;
  21         int                     graph_depth;
  22         int                     func_stack_trace;
  23         int                     func_irq_info;
  24         int                     graph_nosleep_time;
  25         int                     graph_noirqs;
  26         int                     graph_verbose;
  27         int                     graph_thresh;
  28         unsigned int            initial_delay;
  29 };
  30
  31 struct filter_entry {
  32         struct list_head        list;
  33         char                    name[];
  34 };
  35
  36 #define NUM_BUCKET  22  /* 20 + 2 (for outliers in both direction) */
  37
  38 #ifdef HAVE_BPF_SKEL
  39
  40 int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace);
  41 int perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace);
  42 int perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace);
  43 int perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace,
  44                                   int buckets[]);
  45 int perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace);
  46
  47 #else  /* !HAVE_BPF_SKEL */
  48
  49 static inline int
  50 perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace __maybe_unused)
  51 {
  52         return -1;
  53 }
  54
  55 static inline int
  56 perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace __maybe_unused)
  57 {
  58         return -1;
  59 }
  60
  61 static inline int
  62 perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace __maybe_unused)
  63 {
  64         return -1;
  65 }
  66
  67 static inline int
  68 perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace __maybe_unused,
  69                               int buckets[] __maybe_unused)
  70 {
  71         return -1;
  72 }
  73
  74 static inline int
  75 perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace __maybe_unused)
  76 {
  77         return -1;
  78 }
  79
  80 #endif  /* HAVE_BPF_SKEL */
  81
  82 #endif  /* __PERF_FTRACE_H__ */