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 struct hashamp;
  10
  11 struct perf_ftrace {
  12         struct evlist           *evlist;
  13         struct target           target;
  14         const char              *tracer;
  15         struct list_head        filters;
  16         struct list_head        notrace;
  17         struct list_head        graph_funcs;
  18         struct list_head        nograph_funcs;
  19         struct hashmap          *profile_hash;
  20         unsigned long           percpu_buffer_size;
  21         bool                    inherit;
  22         bool                    use_nsec;
  23         int                     graph_depth;
  24         int                     func_stack_trace;
  25         int                     func_irq_info;
  26         int                     graph_nosleep_time;
  27         int                     graph_noirqs;
  28         int                     graph_verbose;
  29         int                     graph_thresh;
  30         int                     graph_tail;
  31 };
  32
  33 struct filter_entry {
  34         struct list_head        list;
  35         char                    name[];
  36 };
  37
  38 #define NUM_BUCKET  22  /* 20 + 2 (for outliers in both direction) */
  39
  40 #ifdef HAVE_BPF_SKEL
  41
  42 int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace);
  43 int perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace);
  44 int perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace);
  45 int perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace,
  46                                   int buckets[]);
  47 int perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace);
  48
  49 #else  /* !HAVE_BPF_SKEL */
  50
  51 static inline int
  52 perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace __maybe_unused)
  53 {
  54         return -1;
  55 }
  56
  57 static inline int
  58 perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace __maybe_unused)
  59 {
  60         return -1;
  61 }
  62
  63 static inline int
  64 perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace __maybe_unused)
  65 {
  66         return -1;
  67 }
  68
  69 static inline int
  70 perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace __maybe_unused,
  71                               int buckets[] __maybe_unused)
  72 {
  73         return -1;
  74 }
  75
  76 static inline int
  77 perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace __maybe_unused)
  78 {
  79         return -1;
  80 }
  81
  82 #endif  /* HAVE_BPF_SKEL */
  83
  84 #endif  /* __PERF_FTRACE_H__ */