linux-kernel - Re: [PATCH 01/17] perf hists: Basic support of hierarchical report view

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Message-ID: <20160121130126.GB13893@danjae.kornet>
Date:	Thu, 21 Jan 2016 22:01:26 +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>,
	Stephane Eranian <eranian@...gle.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH 01/17] perf hists: Basic support of hierarchical report
 view

On Thu, Jan 21, 2016 at 12:35:11PM +0100, Jiri Olsa wrote:
> On Sun, Jan 17, 2016 at 01:03:01AM +0900, Namhyung Kim wrote:
> 
> SNIP
> 
> > diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
> > index 687bbb124428..15a75d44de91 100644
> > --- a/tools/perf/util/sort.h
> > +++ b/tools/perf/util/sort.h
> > @@ -94,9 +94,11 @@ struct hist_entry {
> >  	s32			socket;
> >  	s32			cpu;
> >  	u8			cpumode;
> > +	u8			depth;
> >  
> >  	/* We are added by hists__add_dummy_entry. */
> >  	bool			dummy;
> > +	bool			leaf;
> >  
> >  	char			level;
> >  	u8			filtered;
> > @@ -118,13 +120,22 @@ struct hist_entry {
> >  	char			*srcline;
> >  	char			*srcfile;
> >  	struct symbol		*parent;
> > -	struct rb_root		sorted_chain;
> >  	struct branch_info	*branch_info;
> >  	struct hists		*hists;
> >  	struct mem_info		*mem_info;
> >  	void			*raw_data;
> >  	u32			raw_size;
> >  	void			*trace_output;
> > +	struct perf_hpp_fmt	*fmt;
> > +	struct hist_entry	*parent_he;
> > +	union {
> > +		/* this is for hierarchical entry structure */
> > +		struct {
> > +			struct rb_root	hroot_in;
> > +			struct rb_root  hroot_out;
> 
> we use 'entries_in' and 'entries' in hists object
> 
> could we keep the names in here as well to indicate
> it's doing the same stuff..?

Maybe it's a preference.  I don't think it's necessary, sometimes we
need to differentiate whether it accesses to (top-level) hists or hist
entry IMHO.

Thanks,
Namhyung