d2009c5130
In order to implement callchains collapsing, we need to keep track of the maximum depth in a histogram tree of callchains. This way we'll avoid allocating an arbitrary temporary buffer size on callchain merge time. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Christoph Hellwig <hch@infradead.org>
74 lines
1.6 KiB
C
74 lines
1.6 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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struct callchain_node {
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struct callchain_node *parent;
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struct list_head brothers;
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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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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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};
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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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static inline void callchain_init(struct callchain_root *root)
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{
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INIT_LIST_HEAD(&root->node.brothers);
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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->max_depth = 0;
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}
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static inline u64 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 register_callchain_param(struct callchain_param *param);
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int append_chain(struct callchain_root *root, struct ip_callchain *chain,
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struct map_symbol *syms, u64 period);
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bool ip_callchain__valid(struct ip_callchain *chain, const event_t *event);
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#endif /* __PERF_CALLCHAIN_H */
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