1. 根目录:
2. tools
3. perf
4. util
5. hist.h

#ifndef __PERF_HIST_H
#define __PERF_HIST_H

#include <linux/types.h>
#include <pthread.h>
#include "callchain.h"
#include "header.h"

extern struct callchain_param callchain_param;

struct hist_entry;
struct addr_location;
struct symbol;

/*
 * The kernel collects the number of events it couldn't send in a stretch and
 * when possible sends this number in a PERF_RECORD_LOST event. The number of
 * such "chunks" of lost events is stored in .nr_events[PERF_EVENT_LOST] while
 * total_lost tells exactly how many events the kernel in fact lost, i.e. it is
 * the sum of all struct lost_event.lost fields reported.
 *
 * The total_period is needed because by default auto-freq is used, so
 * multipling nr_events[PERF_EVENT_SAMPLE] by a frequency isn't possible to get
 * the total number of low level events, it is necessary to to sum all struct
 * sample_event.period and stash the result in total_period.
 */
struct events_stats {
	u64 total_period;
	u64 total_lost;
	u64 total_invalid_chains;
	u32 nr_events[PERF_RECORD_HEADER_MAX];
	u32 nr_lost_warned;
	u32 nr_unknown_events;
	u32 nr_invalid_chains;
	u32 nr_unknown_id;
	u32 nr_unprocessable_samples;
};

enum hist_column {
	HISTC_SYMBOL,
	HISTC_DSO,
	HISTC_THREAD,
	HISTC_COMM,
	HISTC_PARENT,
	HISTC_CPU,
	HISTC_MISPREDICT,
	HISTC_SYMBOL_FROM,
	HISTC_SYMBOL_TO,
	HISTC_DSO_FROM,
	HISTC_DSO_TO,
	HISTC_SRCLINE,
	HISTC_LOCAL_WEIGHT,
	HISTC_GLOBAL_WEIGHT,
	HISTC_MEM_DADDR_SYMBOL,
	HISTC_MEM_DADDR_DSO,
	HISTC_MEM_LOCKED,
	HISTC_MEM_TLB,
	HISTC_MEM_LVL,
	HISTC_MEM_SNOOP,
	HISTC_NR_COLS, /* Last entry */
};

struct thread;
struct dso;

struct hists {
	struct rb_root		entries_in_array[2];
	struct rb_root		*entries_in;
	struct rb_root		entries;
	struct rb_root		entries_collapsed;
	u64			nr_entries;
	const struct thread	*thread_filter;
	const struct dso	*dso_filter;
	const char		*uid_filter_str;
	const char		*symbol_filter_str;
	pthread_mutex_t		lock;
	struct events_stats	stats;
	u64			event_stream;
	u16			col_len[HISTC_NR_COLS];
};

struct hist_entry *__hists__add_entry(struct hists *self,
				      struct addr_location *al,
				      struct symbol *parent, u64 period,
				      u64 weight);
int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right);
int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right);
int hist_entry__sort_snprintf(struct hist_entry *self, char *bf, size_t size,
			      struct hists *hists);
void hist_entry__free(struct hist_entry *);

struct hist_entry *__hists__add_branch_entry(struct hists *self,
					     struct addr_location *al,
					     struct symbol *sym_parent,
					     struct branch_info *bi,
					     u64 period,
					     u64 weight);

struct hist_entry *__hists__add_mem_entry(struct hists *self,
					  struct addr_location *al,
					  struct symbol *sym_parent,
					  struct mem_info *mi,
					  u64 period,
					  u64 weight);

void hists__output_resort(struct hists *self);
void hists__output_resort_threaded(struct hists *hists);
void hists__collapse_resort(struct hists *self);
void hists__collapse_resort_threaded(struct hists *hists);

void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel);
void hists__decay_entries_threaded(struct hists *hists, bool zap_user,
				   bool zap_kernel);
void hists__output_recalc_col_len(struct hists *hists, int max_rows);

void hists__inc_nr_entries(struct hists *hists, struct hist_entry *h);
void hists__inc_nr_events(struct hists *self, u32 type);
void events_stats__inc(struct events_stats *stats, u32 type);
size_t events_stats__fprintf(struct events_stats *stats, FILE *fp);

size_t hists__fprintf(struct hists *self, bool show_header, int max_rows,
		      int max_cols, FILE *fp);

int hist_entry__inc_addr_samples(struct hist_entry *self, int evidx, u64 addr);
int hist_entry__annotate(struct hist_entry *self, size_t privsize);

void hists__filter_by_dso(struct hists *hists);
void hists__filter_by_thread(struct hists *hists);
void hists__filter_by_symbol(struct hists *hists);

u16 hists__col_len(struct hists *self, enum hist_column col);
void hists__set_col_len(struct hists *self, enum hist_column col, u16 len);
bool hists__new_col_len(struct hists *self, enum hist_column col, u16 len);
void hists__reset_col_len(struct hists *hists);
void hists__calc_col_len(struct hists *hists, struct hist_entry *he);

void hists__match(struct hists *leader, struct hists *other);
int hists__link(struct hists *leader, struct hists *other);

struct perf_hpp {
	char *buf;
	size_t size;
	const char *sep;
	void *ptr;
};

struct perf_hpp_fmt {
	int (*header)(struct perf_hpp *hpp);
	int (*width)(struct perf_hpp *hpp);
	int (*color)(struct perf_hpp *hpp, struct hist_entry *he);
	int (*entry)(struct perf_hpp *hpp, struct hist_entry *he);

	struct list_head list;
};

extern struct list_head perf_hpp__list;

#define perf_hpp__for_each_format(format) \
	list_for_each_entry(format, &perf_hpp__list, list)

extern struct perf_hpp_fmt perf_hpp__format[];

enum {
	PERF_HPP__BASELINE,
	PERF_HPP__OVERHEAD,
	PERF_HPP__OVERHEAD_SYS,
	PERF_HPP__OVERHEAD_US,
	PERF_HPP__OVERHEAD_GUEST_SYS,
	PERF_HPP__OVERHEAD_GUEST_US,
	PERF_HPP__SAMPLES,
	PERF_HPP__PERIOD,
	PERF_HPP__PERIOD_BASELINE,
	PERF_HPP__DELTA,
	PERF_HPP__RATIO,
	PERF_HPP__WEIGHTED_DIFF,
	PERF_HPP__FORMULA,

	PERF_HPP__MAX_INDEX
};

void perf_hpp__init(void);
void perf_hpp__column_register(struct perf_hpp_fmt *format);
void perf_hpp__column_enable(unsigned col);
int hist_entry__period_snprintf(struct perf_hpp *hpp, struct hist_entry *he,
				bool color);

struct perf_evlist;

struct hist_browser_timer {
	void (*timer)(void *arg);
	void *arg;
	int refresh;
};

#ifdef SLANG_SUPPORT
#include "../ui/keysyms.h"
int hist_entry__tui_annotate(struct hist_entry *he, struct perf_evsel *evsel,
			     struct hist_browser_timer *hbt);

int perf_evlist__tui_browse_hists(struct perf_evlist *evlist, const char *help,
				  struct hist_browser_timer *hbt,
				  struct perf_session_env *env);
int script_browse(const char *script_opt);
#else
static inline
int perf_evlist__tui_browse_hists(struct perf_evlist *evlist __maybe_unused,
				  const char *help __maybe_unused,
				  struct hist_browser_timer *hbt __maybe_unused,
				  struct perf_session_env *env __maybe_unused)
{
	return 0;
}

static inline int hist_entry__tui_annotate(struct hist_entry *self
					   __maybe_unused,
					   struct perf_evsel *evsel
					   __maybe_unused,
					   struct hist_browser_timer *hbt
					   __maybe_unused)
{
	return 0;
}

static inline int script_browse(const char *script_opt __maybe_unused)
{
	return 0;
}

#define K_LEFT  -1000
#define K_RIGHT -2000
#define K_SWITCH_INPUT_DATA -3000
#endif

#ifdef GTK2_SUPPORT
int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist, const char *help,
				  struct hist_browser_timer *hbt __maybe_unused);
#else
static inline
int perf_evlist__gtk_browse_hists(struct perf_evlist *evlist __maybe_unused,
				  const char *help __maybe_unused,
				  struct hist_browser_timer *hbt __maybe_unused)
{
	return 0;
}
#endif

unsigned int hists__sort_list_width(struct hists *self);

double perf_diff__compute_delta(struct hist_entry *he, struct hist_entry *pair);
double perf_diff__compute_ratio(struct hist_entry *he, struct hist_entry *pair);
s64 perf_diff__compute_wdiff(struct hist_entry *he, struct hist_entry *pair);
int perf_diff__formula(struct hist_entry *he, struct hist_entry *pair,
		       char *buf, size_t size);
double perf_diff__period_percent(struct hist_entry *he, u64 period);
#endif	/* __PERF_HIST_H */