[PATCH v9 0/7] perf report: Show branch type

[Jin Yao]

v9:
---
   It only changes the patch "perf/x86/intel: Record branch type".
   Peter suggests to use __ffs() to find first bit.
   Yes, with this change, the code is simpler and clearer.

   No other functional changes.


v8:
---
   Change PERF_BR_NONE to PERF_BR_UNKNOWN according to Peter's comments.
   No other functional changes.


v7:
---
   Redefine the common branch types according to review comments from
   Michael Ellerman <mpe@xxxxxxxxxxxxxx>

   Now the patch series just defines a minimum but more common set of
   branch types.

   PERF_BR_NONE            : unknown
   PERF_BR_COND            ïconditional
   PERF_BR_UNCOND          : unconditional
   PERF_BR_IND             : indirect
   PERF_BR_CALL            : function call
   PERF_BR_IND_CALL        : indirect function call
   PERF_BR_RET             : function return
   PERF_BR_SYSCALL         : syscall
   PERF_BR_SYSRET          : syscall return
   PERF_BR_COND_CALL       : conditional function call
   PERF_BR_COND_RET        : conditional function return


v6:
---
   Update according to the review comments from
   Jiri Olsa <jolsa@xxxxxxxxxx>. Major modifications are:

   1. Move that multiline conditional code inside {} brackets.

   2. Move branch_type_stat_display() from builtin-report.c to
      branch.c. Move branch_type_str() from callchain.c to
      branch.c.

   3. Keep the original branch info display order, that is:
      predicted, abort, cycles, iterations


v5:
---
   Mainly the v5 patch series are updated according to
   comments from Jiri Olsa <jolsa@xxxxxxxxxx>.

   The kernel part doesn't have functional change. It just
   solve the merge issue.

   In userspace, the functions of branch type counting and
   branch type name resolving are moved to the new files:
   util/branch.c, util/branch.h.

   And refactor the branch info printing code for better
   maintenance.

Not changed (or just fix merge issue):
  perf/core: Define the common branch type classification
  perf/x86/intel: Record branch type
  perf record: Create a new option save_type in --branch-filter

New patches:
  perf report: Refactor the branch info printing code
  perf util: Create branch.c/.h for common branch functions

Changed:
  perf report: Show branch type statistics for stdio mode
  perf report: Show branch type in callchain entry


v4:
---
1. Describe the major changes in patch description.
   Thanks for Peter Zijlstra's reminding.

2. Initialize branch type to 0 in intel_pmu_lbr_read_32 and
   intel_pmu_lbr_read_64. Remove the invalid else code in
   intel_pmu_lbr_filter.


v3:
---
1. Move the JCC forward/backward and cross page computing from
   kernel to userspace.

2. Use lookup table to replace original switch/case processing.


Changed:
  perf/core: Define the common branch type classification
  perf/x86/intel: Record branch type
  perf report: Show branch type statistics for stdio mode
  perf report: Show branch type in callchain entry

Not changed:
  perf record: Create a new option save_type in --branch-filter

v2:
---
1. Use 4 bits in perf_branch_entry to record branch type.

2. Pull out some common branch types from FAR_BRANCH. Now the branch
   types defined in perf_event.h:

Jin Yao (7):
  perf/core: Define the common branch type classification
  perf/x86/intel: Record branch type
  perf record: Create a new option save_type in --branch-filter
  perf report: Refactor the branch info printing code
  perf util: Create branch.c/.h for common branch functions
  perf report: Show branch type statistics for stdio mode
  perf report: Show branch type in callchain entry

 arch/x86/events/intel/lbr.c              |  51 +++++++++-
 include/uapi/linux/perf_event.h          |  27 ++++-
 tools/include/uapi/linux/perf_event.h    |  27 ++++-
 tools/perf/Documentation/perf-record.txt |   1 +
 tools/perf/builtin-report.c              |  25 +++++
 tools/perf/util/Build                    |   1 +
 tools/perf/util/branch.c                 | 166 +++++++++++++++++++++++++++++++
 tools/perf/util/branch.h                 |  25 +++++
 tools/perf/util/callchain.c              | 140 ++++++++++++++------------
 tools/perf/util/callchain.h              |   5 +-
 tools/perf/util/event.h                  |   3 +-
 tools/perf/util/hist.c                   |   5 +-
 tools/perf/util/machine.c                |  26 +++--
 tools/perf/util/parse-branch-options.c   |   1 +
 14 files changed, 419 insertions(+), 84 deletions(-)
 create mode 100644 tools/perf/util/branch.c
 create mode 100644 tools/perf/util/branch.h

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2.7.4