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

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Date:	Tue,  6 Oct 2015 14:25:09 +0200
From:	Jiri Olsa <jolsa@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: [RFC 0/3] perf tools: Make perf_hpp__init respect output dimensions

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? ;-)

Available in:
  git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
  perf/cols

thanks,
jirka


---
Jiri Olsa (3):
      perf tools: Get rid of superfluos call to reset_dimensions
      perf tools: Introduce hpp_dimension__add_output function
      perf tools: Use hpp_dimension__add_output to register hpp columns

 tools/perf/ui/hist.c   | 16 ++++++++--------
 tools/perf/util/sort.c |  8 ++++++--
 tools/perf/util/sort.h |  2 ++
 3 files changed, 16 insertions(+), 10 deletions(-)
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