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Commit b685ac22 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf symbols: Add front end cache for DSO symbol lookup 



Acked-by: default avatarDavid Ahern <dsahern@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-voo94tow8wpkcc76mlkny6sc@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 768dd3f3

tools/perf/util/dso.h

+4 −0
Original line number Diff line number Diff line
@@ -137,6 +137,10 @@ struct dso { 
	struct rb_node	 rb_node;	/* rbtree node sorted by long name */

	struct rb_root	 symbols[MAP__NR_TYPES];

	struct rb_root	 symbol_names[MAP__NR_TYPES];

	struct {

		u64		addr;

		struct symbol	*symbol;

	} last_find_result[MAP__NR_TYPES];

	void		 *a2l;

	char		 *symsrc_filename;

	unsigned int	 a2l_fails;

tools/perf/util/symbol.c

+6 −1
Original line number Diff line number Diff line
@@ -444,7 +444,12 @@ static struct symbol *symbols__find_by_name(struct rb_root *symbols, 
struct symbol *dso__find_symbol(struct dso *dso,

				enum map_type type, u64 addr)

{

	return symbols__find(&dso->symbols[type], addr);

	if (dso->last_find_result[type].addr != addr) {

		dso->last_find_result[type].addr   = addr;

		dso->last_find_result[type].symbol = symbols__find(&dso->symbols[type], addr);

	}



	return dso->last_find_result[type].symbol;

}



struct symbol *dso__first_symbol(struct dso *dso, enum map_type type)