[PATCH RFC V4 0/4] per event callgrap and time support

[kan.liang@intel.com]

From: Kan Liang <kan.liang@intel.com>

This patchkit adds the ability to turn off callgraphs and time stamps
per event. This in term can reduce sampling overhead and the size of
the perf.data.

Changes since V1:
  - Break up V1 patches into three patches(parse option changes,
    partial time support and partial callgrap support).
  - Use strings 'fp,dwarf,lbr,no' to identify callchains
  - Add test case in parse-events.c

Changes since V2:
  - Rebase on 60cd37eb10

Changes since V3:
  - Replace OPT_CALLBACK_SET by current existing callback mechanism.
  - Using perf_evsel__set_sample_bit if possible
  - Change the expression "partial" to "per event"
  - Using global variable to indicate if 'time' is set per event.
    If 'time' is not set, enable it by default for perf record.

Kan Liang (4):
  perf,tools: introduce callgraph_set for callgraph option
  perf,tool: per-event time support
  perf,tool: per-event callgrap support
  perf,tests: Add tests to callgrap and time parse

 tools/perf/Documentation/perf-record.txt |  8 ++++-
 tools/perf/builtin-record.c              | 13 ++++++--
 tools/perf/builtin-trace.c               |  1 +
 tools/perf/perf.h                        |  1 +
 tools/perf/tests/parse-events.c          | 28 +++++++++++++++++
 tools/perf/util/evsel.c                  | 54 ++++++++++++++++++++++++++++++--
 tools/perf/util/parse-events.c           | 29 +++++++++++++++++
 tools/perf/util/parse-events.h           |  5 +++
 tools/perf/util/parse-events.l           |  3 ++
 tools/perf/util/pmu.c                    |  3 +-
 10 files changed, 137 insertions(+), 8 deletions(-)

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1.8.3.1