diff options
| author |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-07-22 12:52:17 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-07-23 11:28:35 -0300 |
| commit | b685ac22b436455db9c9c16b384d7aa4531cdd80 (patch) | |
| tree | 8873e805f4c605c1d29c4595013bb294cd5de3c3 /tools/perf | |
| parent | perf header: Use argv style storage for cmdline feature data (diff) | |
| download | linux-dev-b685ac22b436455db9c9c16b384d7aa4531cdd80.tar.xz linux-dev-b685ac22b436455db9c9c16b384d7aa4531cdd80.zip | |
perf symbols: Add front end cache for DSO symbol lookup
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>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/dso.h | 4 | ||||
| -rw-r--r-- | tools/perf/util/symbol.c | 7 |
2 files changed, 10 insertions, 1 deletions
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h index 2fe98bb0e95b..c73276db6d6f 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 45c2e3a8316b..725640fd7cd8 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) |