linux-kernel - Re: [PATCH 07/40] perf tools: Handle indexed data file properly

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Date:	Tue, 19 May 2015 15:40:07 +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 <a.p.zijlstra@...llo.nl>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Andi Kleen <andi@...stfloor.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 07/40] perf tools: Handle indexed data file properly

On Mon, May 18, 2015 at 08:37:28PM +0200, Jiri Olsa wrote:
> On Mon, May 18, 2015 at 09:30:22AM +0900, Namhyung Kim wrote:
> > When perf detects data file has index table, process header part first
> > and then rest data files in a row.  Note that the indexed sample data is
> > recorded for each cpu/thread separately, it's already ordered with
> > respect to themselves so no need to use the ordered event queue
> > interface.
> > 
> > Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> > ---
> >  tools/perf/perf.c         |  1 +
> >  tools/perf/perf.h         |  2 ++
> >  tools/perf/util/session.c | 55 +++++++++++++++++++++++++++++++++++++++--------
> >  3 files changed, 49 insertions(+), 9 deletions(-)
> > 
> > diff --git a/tools/perf/perf.c b/tools/perf/perf.c
> > index b857fcbd00cf..960942d9a0b7 100644
> > --- a/tools/perf/perf.c
> > +++ b/tools/perf/perf.c
> > @@ -27,6 +27,7 @@ const char perf_more_info_string[] =
> >  int use_browser = -1;
> >  static int use_pager = -1;
> >  const char *input_name;
> > +bool perf_has_index;
> 
> I probably missed some discussion here, but why is this not
> perf_session function? I saw some non session related functions
> further in the patchset using this.. is that the reason?
> 
> it seems fairly perf_session specific.. might be worth to
> keep it there? just asking ;-)

I agree.  But it requires to pass a pointer to session wherever
processing samples.  Arnaldo said that he wanted to remove accesses to
a session in general.  So I added the global variable.

https://lkml.org/lkml/2015/3/3/353

Thanks,
Namhyung
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