![Adrian Hunter](/assets/img/avatar_default.png)
Now that the sample parsing correctly checks data sizes there is no reason for it to be done again for callchains. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1377591794-30553-4-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
153 lines
3.3 KiB
C
153 lines
3.3 KiB
C
#ifndef __PERF_CALLCHAIN_H
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#define __PERF_CALLCHAIN_H
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#include "../perf.h"
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#include <linux/list.h>
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#include <linux/rbtree.h>
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#include "event.h"
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#include "symbol.h"
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enum chain_mode {
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CHAIN_NONE,
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CHAIN_FLAT,
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CHAIN_GRAPH_ABS,
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CHAIN_GRAPH_REL
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};
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enum chain_order {
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ORDER_CALLER,
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ORDER_CALLEE
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};
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struct callchain_node {
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struct callchain_node *parent;
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struct list_head siblings;
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struct list_head children;
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struct list_head val;
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struct rb_node rb_node; /* to sort nodes in an rbtree */
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struct rb_root rb_root; /* sorted tree of children */
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unsigned int val_nr;
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u64 hit;
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u64 children_hit;
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};
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struct callchain_root {
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u64 max_depth;
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struct callchain_node node;
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};
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struct callchain_param;
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typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_root *,
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u64, struct callchain_param *);
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enum chain_key {
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CCKEY_FUNCTION,
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CCKEY_ADDRESS
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};
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struct callchain_param {
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enum chain_mode mode;
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u32 print_limit;
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double min_percent;
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sort_chain_func_t sort;
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enum chain_order order;
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enum chain_key key;
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};
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struct callchain_list {
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u64 ip;
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struct map_symbol ms;
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struct list_head list;
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};
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/*
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* A callchain cursor is a single linked list that
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* let one feed a callchain progressively.
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* It keeps persistent allocated entries to minimize
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* allocations.
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*/
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struct callchain_cursor_node {
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u64 ip;
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struct map *map;
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struct symbol *sym;
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struct callchain_cursor_node *next;
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};
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struct callchain_cursor {
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u64 nr;
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struct callchain_cursor_node *first;
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struct callchain_cursor_node **last;
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u64 pos;
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struct callchain_cursor_node *curr;
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};
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extern __thread struct callchain_cursor callchain_cursor;
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static inline void callchain_init(struct callchain_root *root)
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{
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INIT_LIST_HEAD(&root->node.siblings);
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INIT_LIST_HEAD(&root->node.children);
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INIT_LIST_HEAD(&root->node.val);
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root->node.parent = NULL;
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root->node.hit = 0;
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root->node.children_hit = 0;
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root->max_depth = 0;
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}
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static inline u64 callchain_cumul_hits(struct callchain_node *node)
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{
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return node->hit + node->children_hit;
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}
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int callchain_register_param(struct callchain_param *param);
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int callchain_append(struct callchain_root *root,
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struct callchain_cursor *cursor,
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u64 period);
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int callchain_merge(struct callchain_cursor *cursor,
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struct callchain_root *dst, struct callchain_root *src);
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/*
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* Initialize a cursor before adding entries inside, but keep
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* the previously allocated entries as a cache.
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*/
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static inline void callchain_cursor_reset(struct callchain_cursor *cursor)
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{
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cursor->nr = 0;
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cursor->last = &cursor->first;
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}
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int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
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struct map *map, struct symbol *sym);
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/* Close a cursor writing session. Initialize for the reader */
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static inline void callchain_cursor_commit(struct callchain_cursor *cursor)
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{
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cursor->curr = cursor->first;
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cursor->pos = 0;
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}
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/* Cursor reading iteration helpers */
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static inline struct callchain_cursor_node *
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callchain_cursor_current(struct callchain_cursor *cursor)
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{
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if (cursor->pos == cursor->nr)
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return NULL;
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return cursor->curr;
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}
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static inline void callchain_cursor_advance(struct callchain_cursor *cursor)
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{
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cursor->curr = cursor->curr->next;
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cursor->pos++;
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}
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struct option;
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int record_parse_callchain_opt(const struct option *opt, const char *arg, int unset);
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extern const char record_callchain_help[];
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#endif /* __PERF_CALLCHAIN_H */
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