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perf symbols: Add front end cache for DSO symbol lookup

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Acked-by: David 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: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2015-07-22 12:52:17 -03:00
parent 768dd3f3a6
commit b685ac22b4
2 changed files with 10 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
tools/perf/util/dso.h
View file

@ -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;

7
tools/perf/util/symbol.c
View file

@ -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)