Re: [PATCH v5 4/4] perf report: support hotkey to let user select any event for sorting

[Jin, Yao]

On 12/19/2019 5:10 PM, Jiri Olsa wrote:
> On Thu, Dec 19, 2019 at 02:09:29PM +0800, Jin Yao wrote:
>
> SNIP
>
> > +		case '0' ... '9':
> > +			if (!symbol_conf.event_group ||
> > +			    evsel->core.nr_members < 2) {
> > +				snprintf(buf, sizeof(buf),
> > +					 "Sort by index only available with group events!");
> > +				helpline = buf;
> > +				continue;
> > +			}
> > +
> > +			symbol_conf.group_sort_idx = key - '0';
> > +
> > +			if (symbol_conf.group_sort_idx >= evsel->core.nr_members) {
> > +				snprintf(buf, sizeof(buf),
> > +					 "Max event group index to sort is %d (index from 0 to %d)",
> > +					 evsel->core.nr_members - 1,
> > +					 evsel->core.nr_members - 1);
> > +				helpline = buf;
> > +				continue;
> > +			}
> > +
> > +			key = K_RELOAD;
> > +			goto out_free_stack;
> >   		case 'a':
> >   			if (!hists__has(hists, sym)) {
> >   				ui_browser__warning(&browser->b, delay_secs * 2,
> > --
> > 2.17.1
>
> maybe also something like this to eliminate unneeded refresh?
>
> jirka
>
>
> ---
> diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
> index 22e76bd1a2d9..9f5dd48500a2 100644
> --- a/tools/perf/ui/browsers/hists.c
> +++ b/tools/perf/ui/browsers/hists.c
> @@ -2947,6 +2947,9 @@ static int perf_evsel__hists_browse(struct evsel *evsel, int nr_events,
>   				continue;
>   			}
>   
> +			if (key - '0' == symbol_conf.group_sort_idx)
> +				continue;
> +
>   			symbol_conf.group_sort_idx = key - '0';
>   
>   			if (symbol_conf.group_sort_idx >= evsel->core.nr_members) {

Hi Jiri,

Thanks, I think it's a good improvement. It can avoid the unnecessary 
refresh.

If no more comments on this patch-set, I will add this improvement and 
then post v6.

Thanks
Jin Yao