Re: [PATCH 2/4] perf hists browser: Add e/c key handlers to expand callchain for current entry

From: Arnaldo Carvalho de Melo
Date: Fri Jan 20 2017 - 11:43:38 EST


Em Fri, Jan 20, 2017 at 01:41:33PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Fri, Jan 20, 2017 at 10:20:30AM +0100, Jiri Olsa escreveu:
> > Currently we allow only to expand or collapse all entries
> > in the browser with E or C keys. Allow user to expand or
> > collapse only current entry in the browser with e or c key.
>
> I guess we can start with this but then fix it to collapse just the
> subtree, not the whole tree for the current hist_entry, for big
> callchains we can have multiple sub(sub)trees, being able to
> expand/collapse just from where we are in a callchain seems even better.
>
> Applying anyway, better than what we have now,

Also I think that pressing 'e' on an already expanded tree should mean
'c', i.e. make it a toggle, so that we can go back and forth faster.

- Arnaldo

> > Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
> > Cc: David Ahern <dsahern@xxxxxxxxx>
> > Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
> > Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
> > Link: http://lkml.kernel.org/n/tip-vbzhy5yje03v9cvxhht90pyc@xxxxxxxxxxxxxx
> > ---
> > tools/perf/ui/browsers/hists.c | 17 +++++++++++++++++
> > 1 file changed, 17 insertions(+)
> >
> > diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
> > index 8bf18afe2a1f..fc4fb669ceee 100644
> > --- a/tools/perf/ui/browsers/hists.c
> > +++ b/tools/perf/ui/browsers/hists.c
> > @@ -571,6 +571,15 @@ static void hist_browser__set_folding(struct hist_browser *browser, bool unfold)
> > ui_browser__reset_index(&browser->b);
> > }
> >
> > +static void hist_browser__set_folding_selected(struct hist_browser *browser, bool unfold)
> > +{
> > + if (!browser->he_selection)
> > + return;
> > +
> > + hist_entry__set_folding(browser->he_selection, browser, unfold);
> > + browser->b.nr_entries = hist_browser__nr_entries(browser);
> > +}
> > +
> > static void ui_browser__warn_lost_events(struct ui_browser *browser)
> > {
> > ui_browser__warning(browser, 4,
> > @@ -644,10 +653,18 @@ int hist_browser__run(struct hist_browser *browser, const char *help)
> > /* Collapse the whole world. */
> > hist_browser__set_folding(browser, false);
> > break;
> > + case 'c':
> > + /* Collapse the selected entry. */
> > + hist_browser__set_folding_selected(browser, false);
> > + break;
> > case 'E':
> > /* Expand the whole world. */
> > hist_browser__set_folding(browser, true);
> > break;
> > + case 'e':
> > + /* Expand the selected entry. */
> > + hist_browser__set_folding_selected(browser, true);
> > + break;
> > case 'H':
> > browser->show_headers = !browser->show_headers;
> > hist_browser__update_rows(browser);
> > --
> > 2.7.4