Commit-ID: b685ac22b436455db9c9c16b384d7aa4531cdd80
Gitweb: http://git.kernel.org/tip/b685ac22b436455db9c9c16b384d7aa4531cdd80
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Wed, 22 Jul 2015 12:52:17 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 23 Jul 2015 11:28:35 -0300
perf symbols: Add front end cache for DSO symbol lookup
Acked-by: David Ahern <dsahern@xxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Stephane Eranian <eranian@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-voo94tow8wpkcc76mlkny6sc@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/util/dso.h | 4 ++++
tools/perf/util/symbol.c | 7 ++++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 2fe98bb..c73276d 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -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;
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 45c2e3a..725640f 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -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)
--
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