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

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Date:	Tue, 19 Jan 2016 19:51:18 +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>,
	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

Hi Jiri,

On Sun, Jan 17, 2016 at 05:15:33PM +0100, Jiri Olsa wrote:
> On Sun, Jan 17, 2016 at 01:03:01AM +0900, Namhyung Kim wrote:
> 
> SNIP
> 
> >  	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;
> > +		};				/* non-leaf entries */
> > +		struct rb_root	sorted_chain;	/* leaf entry has callchains */
> > +	};
> 
> looks like cool feature!

Thanks!

> 
> could we have the hist_entry storage little more generic?
> and maybe dynamically allocated?

I'm fine with it.

> 
> I'm doing the same thing for the c2c stuff, like having
> for each hist_entry its own 'struct hists' object, which
> records data related to parent hist_entry
> 
> maybe we could strip the 'hists' object to some bare minimum
> which is needed for store/sort/stat and display entries
> in hists_browser ;-)

Yeah, as you can see, it basically needs a pointer to parent entry,
hpp output format, and rbtrees for chlidren.  Also I added depth and
leaf field to make it easy for browser routines.

> 
> I'm preparing RFC patchset in my perf/c2c branch, if you want
> to take a look

Sure.

> 
> however, as I said above, for my own sake it all boils down
> to have 'hists' object within hist_entry, so I can use it
> in the UI code easily
> 
> FYI I also added support for hists object's own sort/output
> format lists.. which I'll curve out and send for review soon

OK, will take a look.

Thanks,
Namhyung