linux-kernel - Re: [PATCH v6 10/25] perf hists: Resort hist entries with hierarchy

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Message-ID: <20160221083617.GB32589@danjae.kornet>
Date:	Sun, 21 Feb 2016 17:36:18 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Jiri Olsa <jolsa@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Stephane Eranian <eranian@...gle.com>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH v6 10/25] perf hists: Resort hist entries with hierarchy

On Sun, Feb 21, 2016 at 12:19:18AM +0100, Jiri Olsa wrote:
> On Tue, Feb 16, 2016 at 11:08:28PM +0900, Namhyung Kim wrote:
> 
> SNIP
> 
> > @@ -1349,6 +1427,17 @@ static void output_resort(struct hists *hists, struct ui_progress *prog,
> >  
> >  	min_callchain_hits = callchain_total * (callchain_param.min_percent / 100);
> >  
> > +	hists__reset_stats(hists);
> > +	hists__reset_col_len(hists);
> > +
> > +	if (symbol_conf.report_hierarchy) {
> > +		return hists__hierarchy_output_resort(hists, prog,
> > +						      &hists->entries_collapsed,
> > +						      &hists->entries,
> > +						      min_callchain_hits,
> > +						      use_callchain);
> > +	}
> > +
> >  	if (sort__need_collapse)
> >  		root = &hists->entries_collapsed;
> >  	else
> > @@ -1357,9 +1446,6 @@ static void output_resort(struct hists *hists, struct ui_progress *prog,
> >  	next = rb_first(root);
> >  	hists->entries = RB_ROOT;
> 
> above line could be moved together with those 2 below
> and you can then remove *root_out = RB_ROOT; line in
> hists__hierarchy_output_resort

Nope.  The root_out should be initialized anyway since it's called
recursively with child's hroot_out.

Thanks,
Namhyung


> >  
> > -	hists__reset_stats(hists);
> > -	hists__reset_col_len(hists);
> > -
> >  	while (next) {
> >  		n = rb_entry(next, struct hist_entry, rb_node_in);
> >  		next = rb_next(&n->rb_node_in);
> > -- 
> > 2.7.1
> >