linux-kernel - Re: [RFC 0/3] perf tools: Make perf_hpp_

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Date:	Tue, 6 Oct 2015 11:28:07 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [RFC 0/3] perf tools: Make perf_hpp__init respect output
 dimensions

Em Tue, Oct 06, 2015 at 11:04:28PM +0900, Namhyung Kim escreveu:
> On Tue, Oct 6, 2015 at 9:25 PM, Jiri Olsa <jolsa@...nel.org> wrote:
> > hi,
> > The perf_hpp__init currently does not respect sorting dimensions
> > and the setup_sorting function could endup queueing same format
> > twice. That screwed up the perf_hpp__list and got stuck in loop
> > within perf_hpp__setup_output_field function.
> >
> >   $ perf report -F +overhead
> >
> >   0x00000000004c1355 in perf_hpp__is_sort_entry (format=format@...ry=0x880440 <perf_hpp.format>) at util/sort.c:1506
> >   1506    {
> >
> >      #0  0x00000000004c1355 in perf_hpp__is_sort_entry (format=format@...ry=0x880440 <perf_hpp.format>) at util/sort.c:1506
> >      #1  0x00000000004c139d in perf_hpp__same_sort_entry (a=a@...ry=0x880440 <perf_hpp.format>, b=b@...ry=0x2bb2fe0) at util/sort.c:1380
> >      #2  0x00000000004f8d3c in perf_hpp__setup_output_field () at ui/hist.c:554
> >      #3  0x00000000004c1d1e in setup_sorting () at util/sort.c:1984
> >      #4  0x000000000042efbf in cmd_report (argc=0, argv=0x7ffea5a0e790, prefix=<optimized out>) at builtin-report.c:874
> >      #5  0x0000000000476f13 in run_builtin (p=p@...ry=0x875628 <commands+168>, argc=argc@...ry=3, argv=argv@...ry=0x7ffea5a0e790) at perf.c:385
> >      #6  0x000000000047710b in handle_internal_command (argc=3, argv=0x7ffea5a0e790) at perf.c:445
> >      #7  0x0000000000477176 in run_argv (argcp=argcp@...ry=0x7ffea5a0e5fc, argv=argv@...ry=0x7ffea5a0e5f0) at perf.c:489
> >      #8  0x00000000004773e7 in main (argc=3, argv=0x7ffea5a0e790) at perf.c:606
> >
> > Using hpp_dimension__add_output function to register
> > the output column. It will also mark the dimension
> > as taken and omit above stuck.
> >
> > It might need some other changes.. not sure, Namhyung? ;-)
> 
> Nope.  It looks good to me as is. :)  It should work once it sets up
> the output field and sort list properly, so
> 
> Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks, added.

- Arnaldo
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