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perf symbols: Use cached rbtrees

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At the cost of an extra pointer, we can avoid the O(logN) cost of
finding the first element in the tree (smallest node).

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20181206191819.30182-6-dave@stgolabs.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Davidlohr Bueso
2018-12-06 11:18:17 -08:00
committed by Arnaldo Carvalho de Melo
parent ca2270292e
commit 7137ff50b6
8 changed files with 67 additions and 58 deletions
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13
tools/perf/util/symbol.h
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@@ -68,7 +68,7 @@ struct symbol {
};
void symbol__delete(struct symbol *sym);
void symbols__delete(struct rb_root *symbols);
void symbols__delete(struct rb_root_cached *symbols);
/* symbols__for_each_entry - iterate over symbols (rb_root)
*
@@ -77,7 +77,7 @@ void symbols__delete(struct rb_root *symbols);
* @nd: the 'struct rb_node *' to use as a temporary storage
*/
#define symbols__for_each_entry(symbols, pos, nd) \
for (nd = rb_first(symbols); \
for (nd = rb_first_cached(symbols); \
nd && (pos = rb_entry(nd, struct symbol, rb_node)); \
nd = rb_next(nd))
@@ -247,10 +247,11 @@ int dso__synthesize_plt_symbols(struct dso *dso, struct symsrc *ss);
char *dso__demangle_sym(struct dso *dso, int kmodule, const char *elf_name);
void __symbols__insert(struct rb_root *symbols, struct symbol *sym, bool kernel);
void symbols__insert(struct rb_root *symbols, struct symbol *sym);
void symbols__fixup_duplicate(struct rb_root *symbols);
void symbols__fixup_end(struct rb_root *symbols);
void __symbols__insert(struct rb_root_cached *symbols, struct symbol *sym,
bool kernel);
void symbols__insert(struct rb_root_cached *symbols, struct symbol *sym);
void symbols__fixup_duplicate(struct rb_root_cached *symbols);
void symbols__fixup_end(struct rb_root_cached *symbols);
void map_groups__fixup_end(struct map_groups *mg);
typedef int (*mapfn_t)(u64 start, u64 len, u64 pgoff, void *data);