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         int                     graph_depth;
  21         int                     func_stack_trace;
  22         int                     func_irq_info;
  23         int                     graph_nosleep_time;
  24         int                     graph_noirqs;
  25         int                     graph_verbose;
  26         int                     graph_thresh;
  27         unsigned int            initial_delay;
  28 };
  29
  30 struct filter_entry {
  31         struct list_head        list;
  32         char                    name[];
  33 };
  34
  35 #define NUM_BUCKET  22  /* 20 + 2 (for outliers in both direction) */
  36
  37 #ifdef HAVE_BPF_SKEL
  38
  39 int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace);
  40 int perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace);
  41 int perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace);
  42 int perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace,
  43                                   int buckets[]);
  44 int perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace);
  45
  46 #else  /* !HAVE_BPF_SKEL */
  47
  48 static inline int
  49 perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace __maybe_unused)
  50 {
  51         return -1;
  52 }
  53
  54 static inline int
  55 perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace __maybe_unused)
  56 {
  57         return -1;
  58 }
  59
  60 static inline int
  61 perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace __maybe_unused)
  62 {
  63         return -1;
  64 }
  65
  66 static inline int
  67 perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace __maybe_unused,
  68                               int buckets[] __maybe_unused)
  69 {
  70         return -1;
  71 }
  72
  73 static inline int
  74 perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace __maybe_unused)
  75 {
  76         return -1;
  77 }
  78
  79 #endif  /* HAVE_BPF_SKEL */
  80
  81 #endif  /* __PERF_FTRACE_H__ */