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

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Date:	Tue, 19 Jan 2016 13:50:47 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Jiri Olsa <jolsa@...hat.com>, 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

Em Tue, Jan 19, 2016 at 07:51:18PM +0900, Namhyung Kim escreveu:
> 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.

Ok, so how should we proceed? I propose I test this patchkit, which
indeed looks cool from this cover letter description, yay!

If I find no problems, I'll merge it and, then, on top of it, you guys
can work on having this per-feature priv storage sorted out?

Please advise, meanwhile I'll cherry-pick whatever seems easy from both
patchkits.

- Arnaldo
 
> > 
> > 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