[PATCH v4 0/3] perf annotate: Support '--group' option

[Jin Yao <yao.jin@linux.intel.com>]

For non-explicit group, perf report has already supported a option
'--group' which can enable group output.

This patch-set will support perf annotate with the same '--group'.

For example,

    perf record -e cycles,branches ./div
    perf annotate main --stdio --group

                     :            Disassembly of section .text:
                     :
                     :            00000000004004b0 <main>:
                     :            main():
                     :
                     :                    return i;
                     :            }
                     :
                     :            int main(void)
                     :            {
        0.00    0.00 :   4004b0:       push   %rbx
                     :                    int i;
                     :                    int flag;
                     :                    volatile double x = 1212121212, y = 121212;
                     :
                     :                    s_randseed = time(0);
        0.00    0.00 :   4004b1:       xor    %edi,%edi
                     :                    srand(s_randseed);
        0.00    0.00 :   4004b3:       mov    $0x77359400,%ebx
                     :
                     :                    return i;
                     :            }
                     :

v4:
---
  Change function name from perf_evlist_forced_leader to
  perf_evlist__force_leader

Impact:
-------
  perf evlist: Create new function perf_evlist__force_leader
  perf report: Use perf_evlist__force_leader to support '--group'
  perf annotate: Support '--group' option

v3:
---------
Move the comment which was on setup_forced_leader() to the
new function perf_evlist_forced_leader().

Impact
------
  perf evlist: Create a new function perf_evlist_forced_leader
  perf report: Use perf_evlist_forced_leader to support '--group'

v2:
---------
Arnaldo points out that it should be done the way it is for
perf report --group. v2 refers to this way and the patch is
totally rewritten.

Init post:
----------
Post the patch 'perf annotate: Support multiple events without group'

Jin Yao (3):
  perf evlist: Create new function perf_evlist__force_leader
  perf report: Use perf_evlist__force_leader to support '--group'
  perf annotate: Support '--group' option

 tools/perf/builtin-annotate.c |  7 +++++++
 tools/perf/builtin-report.c   | 13 ++-----------
 tools/perf/util/evlist.c      | 15 +++++++++++++++
 tools/perf/util/evlist.h      |  3 +++
 4 files changed, 27 insertions(+), 11 deletions(-)

-- 
2.7.4