perf/util/ftrace.h

0001 #ifndef __PERF_FTRACE_H__
0002 #define __PERF_FTRACE_H__
0003
0004 #include <linux/list.h>
0005
0006 #include "target.h"
0007
0008 struct evlist;
0009
0010 struct perf_ftrace {
0011     struct evlist       *evlist;
0012     struct target       target;
0013     const char      *tracer;
0014     struct list_head    filters;
0015     struct list_head    notrace;
0016     struct list_head    graph_funcs;
0017     struct list_head    nograph_funcs;
0018     unsigned long       percpu_buffer_size;
0019     bool            inherit;
0020     bool            use_nsec;
0021     int         graph_depth;
0022     int         func_stack_trace;
0023     int         func_irq_info;
0024     int         graph_nosleep_time;
0025     int         graph_noirqs;
0026     int         graph_verbose;
0027     int         graph_thresh;
0028     unsigned int        initial_delay;
0029 };
0030
0031 struct filter_entry {
0032     struct list_head    list;
0033     char            name[];
0034 };
0035
0036 #define NUM_BUCKET  22  /* 20 + 2 (for outliers in both direction) */
0037
0038 #ifdef HAVE_BPF_SKEL
0039
0040 int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace);
0041 int perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace);
0042 int perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace);
0043 int perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace,
0044                   int buckets[]);
0045 int perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace);
0046
0047 #else  /* !HAVE_BPF_SKEL */
0048
0049 static inline int
0050 perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace __maybe_unused)
0051 {
0052     return -1;
0053 }
0054
0055 static inline int
0056 perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace __maybe_unused)
0057 {
0058     return -1;
0059 }
0060
0061 static inline int
0062 perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace __maybe_unused)
0063 {
0064     return -1;
0065 }
0066
0067 static inline int
0068 perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace __maybe_unused,
0069                   int buckets[] __maybe_unused)
0070 {
0071     return -1;
0072 }
0073
0074 static inline int
0075 perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace __maybe_unused)
0076 {
0077     return -1;
0078 }
0079
0080 #endif  /* HAVE_BPF_SKEL */
0081
0082 #endif  /* __PERF_FTRACE_H__ */