Merge tag 'perf-core-for-mingo-4.14-20170728' of...

Merge tag 'perf-core-for-mingo-4.14-20170728' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes for 4.14 from Arnaldo Carvalho de Melo:

New features:

 - Add PERF_SAMPLE_CALLCHAIN and PERF_RECORD_MMAP[2] to 'perf data' CTF
   conversion, allowing CTF trace visualization tools to show callchains
   and to resolve symbols (Geneviève Bastien)

Improvements:

 - Use group read for event groups in 'perf stat', reducing overhead when
   groups are defined in the event specification, i.e. when using {} to
   enclose a list of events, asking them to be read at the same time,
   e.g.: "perf stat -e '{cycles,instructions}'" (Jiri Olsa)

Fixes:

 - Do not overwrite perf_sample->weight in 'perf annotate' when
   processing samples, use whatever came from the kernel when
   perf_event_attr.sample_type has PERF_SAMPLE_WEIGHT set or just handle
   its default value, 0, when that is not set and "weight" is one of the
   sort orders chosen (Arnaldo Carvalho de Melo)

 - 'perf annotate --show-total-period' fixes:
    - TUI should show period, not nr_samples
    - Set appropriate column width for period/percent
    - Fix the column header to show "Period" when when that is what
      is being asked for
   (Taeung Song, Arnaldo Carvalho de Melo)

 - Use default sort if evlist is empty, fixing pipe mode (David Carrillo-Cisneros)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>