Re: [PATCH v1 1/6] perf annotate: Delete session for debug builds

[Namhyung Kim]

On Wed, Mar 29, 2023 at 6:18 AM Arnaldo Carvalho de Melo
<acme@xxxxxxxxxx> wrote:
>
> Em Wed, Mar 29, 2023 at 10:09:48AM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Tue, Mar 28, 2023 at 04:55:38PM -0700, Ian Rogers escreveu:
> > > Use the debug build indicator as the guide to free the session. This
> > > implements a behavior described in a comment, which is consequentially
> > > removed.
> > >
> > > Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
> > > ---
> > >  tools/perf/builtin-annotate.c | 16 ++++++----------
> > >  1 file changed, 6 insertions(+), 10 deletions(-)
> > >
> > > diff --git a/tools/perf/builtin-annotate.c b/tools/perf/builtin-annotate.c
> > > index 4750fac7bf93..98d1b6379230 100644
> > > --- a/tools/perf/builtin-annotate.c
> > > +++ b/tools/perf/builtin-annotate.c
> > > @@ -692,16 +692,12 @@ int cmd_annotate(int argc, const char **argv)
> > >
> > >  out_delete:
> > >     /*
> > > -    * Speed up the exit process, for large files this can
> > > -    * take quite a while.
> > > -    *
> > > -    * XXX Enable this when using valgrind or if we ever
> > > -    * librarize this command.
> > > -    *
> > > -    * Also experiment with obstacks to see how much speed
> > > -    * up we'll get here.
> > > -    *
> > > -    * perf_session__delete(session);
> > > +    * Speed up the exit process by only deleting for debug builds. For
> > > +    * large files this can save time.
> > >      */
> > > +#ifndef NDEBUG
> > > +   perf_session__delete(annotate.session);
> > > +#endif
> >
> > So now, but default, we will call this, as we don't have this defined
> > only if DEBUG=1 is set, right?
> >
> > ⬢[acme@toolbox perf-tools-next]$ find tools/perf/ -type f | xargs grep NDEBUG
> > tools/perf/util/mutex.c:#ifndef NDEBUG
> > ⬢[acme@toolbox perf-tools-next]$
>
> We can discuss this later, applied the series with just that zfree()
> change to annotation_options__exit().

I don't think it's just an issue in the perf annotate.  Maybe we can
do the same for perf report and so on.

Anyway we could define NDEBUG=1 for release builds from now on.

Thanks,
Namhyung