Commit-ID: b685ac22b436455db9c9c16b384d7aa4531cdd80 Gitweb: http://git.kernel.org/tip/b685ac22b436455db9c9c16b384d7aa4531cdd80 Author: Arnaldo Carvalho de Melo <a...@redhat.com> AuthorDate: Wed, 22 Jul 2015 12:52:17 -0300 Committer: Arnaldo Carvalho de Melo <a...@redhat.com> CommitDate: Thu, 23 Jul 2015 11:28:35 -0300
perf symbols: Add front end cache for DSO symbol lookup Acked-by: David Ahern <dsah...@gmail.com> Cc: Adrian Hunter <adrian.hun...@intel.com> Cc: Borislav Petkov <b...@suse.de> Cc: Frederic Weisbecker <fweis...@gmail.com> Cc: Jiri Olsa <jo...@redhat.com> Cc: Namhyung Kim <namhy...@kernel.org> Cc: Stephane Eranian <eran...@google.com> Link: http://lkml.kernel.org/n/tip-voo94tow8wpkcc76mlkny...@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com> --- 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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
