[PATCH RFC V8 0/4] per event callgraph and time support

[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 callgraph 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.

Changes since V4:
  - Fix issue of setting callgraph_set

Changes since V5:
  - per-event settings over global settings in general
  - support for event post configuration structure

Changes since V6:
  - Add error infor for per-event time
  - rename the option to call-graph and stacl-size
  - refine parse/config callchain functions,
    and reuse them for per-event callgraph setting
  - Modify perf test

Changes since V7:
  - Rebase on 6ea3269c58
  - Enclose callgraph reset codes.

Kan Liang (4):
  perf,tools: per-event time support
  perf,tools: refine parse/config callchain functions
  perf,tools: per-event callgraph support
  perf,tests: Add tests to callgraph and time parse

 tools/perf/Documentation/perf-record.txt |  8 ++-
 tools/perf/builtin-record.c              |  2 +-
 tools/perf/tests/parse-events.c          | 38 ++++++++++++++
 tools/perf/util/callchain.c              | 14 +++---
 tools/perf/util/callchain.h              |  2 +-
 tools/perf/util/evsel.c                  | 86 +++++++++++++++++++++++++++++---
 tools/perf/util/evsel.h                  |  6 +++
 tools/perf/util/parse-events.c           | 24 +++++++++
 tools/perf/util/parse-events.h           |  3 ++
 tools/perf/util/parse-events.l           |  3 ++
 tools/perf/util/pmu.c                    |  3 +-
 11 files changed, 170 insertions(+), 19 deletions(-)

-- 
1.8.3.1