GitLab

Adad support to convert and store time of day in CTF data conversion for
'perf data convert' subcommand.

The perf.data used for conversion needs to have clock data information -
must be recorded with -k/--clockid option).

New --tod option is added to 'perf data convert' subcommand to convert
data with timestamps converted to wall clock time.

Record data with clockid set:

  # perf record -k CLOCK_MONOTONIC kill
  kill: not enough arguments
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.033 MB perf.data (8 samples) ]

Convert data with TOD timestamps:

  # perf data convert --tod --to-ctf ./ctf
  [ perf data convert: Converted 'perf.data' into CTF data './ctf' ]
  [ perf data convert: Converted and wrote 0.000 MB (8 samples) ]

Display data in perf script:

  # perf script -F+tod --ns
            perf 262150 2020-07-13 18:38:50.097678523 153633.958246159:          1 cycles: ...
            perf 26...