linux-kernel - Re: [PATCH 2/8] perf tools: Introduce perf_hpp__setup_hists

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Date:	Fri, 4 Mar 2016 08:52:13 +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 2/8] perf tools: Introduce perf_hpp__setup_hists_formats()

Hi Jiri,

On Thu, Mar 03, 2016 at 02:40:22PM +0100, Jiri Olsa wrote:
> On Thu, Mar 03, 2016 at 01:12:02AM +0900, Namhyung Kim wrote:
> 
> SNIP
> 
> > +struct perf_hpp_fmt *perf_hpp_fmt__copy(struct perf_hpp_fmt *fmt);
> > +
> >  int hist_entry__filter(struct hist_entry *he, int type, const void *arg);
> >  
> >  static inline bool perf_hpp__should_skip(struct perf_hpp_fmt *format,
> > diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> > index 590ebf70e6da..29c75f0374c4 100644
> > --- a/tools/perf/util/sort.c
> > +++ b/tools/perf/util/sort.c
> > @@ -1908,6 +1908,31 @@ __alloc_dynamic_entry(struct perf_evsel *evsel, struct format_field *field,
> >  	return hde;
> >  }
> >  
> > +struct perf_hpp_fmt *perf_hpp_fmt__copy(struct perf_hpp_fmt *fmt)
> 
> perf_hpp_fmt__dup might be better

OK

> 
> > +{
> > +	struct perf_hpp_fmt *new_fmt = NULL;
> > +
> > +	if (perf_hpp__is_sort_entry(fmt)) {
> > +		struct hpp_sort_entry *hse, *new_hse;
> > +
> > +		hse = container_of(fmt, struct hpp_sort_entry, hpp);
> > +		new_hse = memdup(hse, sizeof(*hse));
> > +		if (new_hse)
> > +			new_fmt = &new_hse->hpp;
> > +	} else if (perf_hpp__is_dynamic_entry(fmt)) {
> > +		struct hpp_dynamic_entry *hde, *new_hde;
> > +
> > +		hde = container_of(fmt, struct hpp_dynamic_entry, hpp);
> > +		new_hde = memdup(hde, sizeof(*hde));
> > +		if (new_hde)
> > +			new_fmt = &new_hde->hpp;
> > +	} else {
> > +		new_fmt = memdup(fmt, sizeof(*fmt));
> > +	}
> 
> how about also initialize new_fmt's list and sort_list in here
> 
> could save some time in future if perf_hpp_fmt__copy is
> used in another place, which won't directly initialize them
> like you do in add_hierarchy_fmt

Fair enough, will change.

Thanks,
Namhyung