On Sat, Mar 13, 2021 at 11:16 AM Yang Jihong <yangjiho...@huawei.com> wrote: > > In hist__find_annotations function, since different hist_entry may point to > same > symbol, we free notes->src to signal already processed this symbol in stdio > mode; > when annotate, entry will skipped if notes->src is NULL to avoid repeated > output. > > However, there is a problem, for example, run the following command: > > # perf record -e branch-misses -e branch-instructions -a sleep 1 > > perf.data file contains different types of sample event. > > If the same IP sample event exists in branch-misses and branch-instructions, > this event uses the same symbol. When annotate branch-misses events, > notes->src > corresponding to this event is set to null, as a result, when annotate > branch-instructions events, this event is skipped and no annotate is output. > > Solution of this patch is to remove zfree in hists__find_annotations and > change sort order to "dso,symbol" to avoid duplicate output when different > processes correspond to the same symbol.
Looks good. But I'm not sure about the branch stack mode. I suspect we can use the same sort key there. Jin Yao, what do you think? Thanks, Namhyung > --- > tools/perf/builtin-annotate.c | 13 ++++++------- > 1 file changed, 6 insertions(+), 7 deletions(-) > > diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c > index a23ba6bb99b6..ad169e3e2e8f 100644 > --- a/tools/perf/builtin-annotate.c > +++ b/tools/perf/builtin-annotate.c > @@ -374,13 +374,6 @@ static void hists__find_annotations(struct hists *hists, > } else { > hist_entry__tty_annotate(he, evsel, ann); > nd = rb_next(nd); > - /* > - * Since we have a hist_entry per IP for the same > - * symbol, free he->ms.sym->src to signal we already > - * processed this symbol. > - */ > - zfree(¬es->src->cycles_hist); > - zfree(¬es->src); > } > } > } > @@ -624,6 +617,12 @@ int cmd_annotate(int argc, const char **argv) > if (setup_sorting(annotate.session->evlist) < 0) > usage_with_options(annotate_usage, options); > } else { > + /* > + * Events of different processes may correspond to the same > + * symbol, we do not care about the processes in annotate, > + * set sort order to avoid repeated output. > + */ > + sort_order = "dso,symbol"; > if (setup_sorting(NULL) < 0) > usage_with_options(annotate_usage, options); > } > -- > 2.30.GIT >