tools/perf/util/ftrace.h

#ifndef __PERF_FTRACE_H__
#define __PERF_FTRACE_H__

#include <linux/list.h>

#include "target.h"

struct evlist;
struct hashamp;
struct stats;

struct perf_ftrace {
	struct evlist		*evlist;
	struct target		target;
	const char		*tracer;
	struct list_head	filters;
	struct list_head	notrace;
	struct list_head	graph_funcs;
	struct list_head	nograph_funcs;
	struct list_head	event_pair;
	struct hashmap		*profile_hash;
	unsigned long		percpu_buffer_size;
	bool			inherit;
	bool			use_nsec;
	unsigned int		bucket_range;
	unsigned int		min_latency;
	unsigned int		max_latency;
	unsigned int		bucket_num;
	bool			hide_empty;
	int			graph_depth;
	int			func_stack_trace;
	int			func_irq_info;
	int			graph_args;
	int			graph_retval;
	int			graph_retval_hex;
	int			graph_retaddr;
	int			graph_nosleep_time;
	int			graph_noirqs;
	int			graph_verbose;
	int			graph_thresh;
	int			graph_tail;
};

struct filter_entry {
	struct list_head	list;
	char			name[];
};

#define NUM_BUCKET  22  /* 20 + 2 (for outliers in both direction) */

#ifdef HAVE_BPF_SKEL

int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace);
int perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace);
int perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace);
int perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace,
				  int buckets[], struct stats *stats);
int perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace);

#else  /* !HAVE_BPF_SKEL */

static inline int
perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace __maybe_unused)
{
	return -1;
}

static inline int
perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace __maybe_unused)
{
	return -1;
}

static inline int
perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace __maybe_unused)
{
	return -1;
}

static inline int
perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace __maybe_unused,
			      int buckets[] __maybe_unused,
			      struct stats *stats __maybe_unused)
{
	return -1;
}

static inline int
perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace __maybe_unused)
{
	return -1;
}

#endif  /* HAVE_BPF_SKEL */

#endif  /* __PERF_FTRACE_H__ */