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

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Date:	Wed, 20 Jan 2016 18:00:59 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Namhyung Kim <namhyung@...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 Tue, Jan 19, 2016 at 01:50:47PM -0300, Arnaldo Carvalho de Melo wrote:
> 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.

Namhyung,
are you going to send another version, or should I review this one?

thanks,
jirka