[PATCH v2 0/7] perf tools: Add wallclock time conversion support

[Jiri Olsa <jolsa@kernel.org>]

hi,
this patchset is based on changes made by David Ahern long time ago.
The perf code moved a lot since then, but the idea is the same.

The patchset is adding the ability to display TOD/wallclock timestamp
in 'perf script' output and in 'perf data convert --to-ctf' subcommand,
so the converted CTF data contain TOD/wallclock timestamps.

It's done by adding new header FEATURE 'CLOCK_DATA' to perf.data, that
stores reference times for both TOD/wallclock time and for the clock that
perf record is configured to use. These reference times are then used to
convert sample's timestamps to TOD/wallclock timestamps.

The feature is available only for recording with clockid specified,
because it's the only case where we can get reference time to TOD/wallclock
time. We can't do that with perf clock yet.

Also available in here:
  git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
  perf/abs_time

v2 changes:
  - fixed HEADER_CLOCK_DATA doc, typo, print format [Namhyung]
  - moved clockid related code into separate object [Andi]

thanks,
jirka


---
Jiri Olsa (7):
      perf tools: Move parse_clockid into clockid object
      perf tools: Add clockid_name function
      perf tools: Store clock references for -k/--clockid option
      perf tools: Move clockid_res_ns under clock struct
      perf tools: Add support to store time of day in CTF data conversion
      perf script: Change enum perf_output_field values to be 64 bits
      perf script: Add tod field to display time of day

 tools/perf/Documentation/perf-data.txt             |   3 ++
 tools/perf/Documentation/perf.data-file-format.txt |  13 +++++++
 tools/perf/builtin-data.c                          |   1 +
 tools/perf/builtin-record.c                        | 145 +++++++++++++++++++++++---------------------------------------------------
 tools/perf/builtin-script.c                        | 195 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----------------------------------
 tools/perf/util/Build                              |   1 +
 tools/perf/util/clockid.c                          | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 tools/perf/util/clockid.h                          |  11 ++++++
 tools/perf/util/data-convert-bt.c                  |  57 ++++++++++++++++++-----------
 tools/perf/util/data-convert.h                     |   1 +
 tools/perf/util/env.h                              |  14 +++++++-
 tools/perf/util/header.c                           | 121 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 tools/perf/util/header.h                           |   1 +
 13 files changed, 492 insertions(+), 190 deletions(-)
 create mode 100644 tools/perf/util/clockid.c
 create mode 100644 tools/perf/util/clockid.h