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[PATCH 0/4] perf stat: Enable group read of counters

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hi,
sending changes to enable group read of perf counters
for perf stat command. It allows us to read whole group
of counters within single read syscall.

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

Not sure why we haven't supported yet, but anyway it was
unavailable for some time due to a bug which was fixed
just recently via:
  ba5213ae6b88 ("perf/core: Correct event creation with PERF_FORMAT_GROUP")

thanks,
jirka


---
Jiri Olsa (4):
      perf tools: Add verbose output for sys_perf_event_open fallback
      perf tools: Add perf_evsel__read_size function
      perf tools: Add perf_evsel__read_counter function
      perf stat: Use group read for event groups

 tools/perf/builtin-stat.c |  30 +++++++++++++++++++---
 tools/perf/util/counts.h  |   1 +
 tools/perf/util/evsel.c   | 147 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 tools/perf/util/evsel.h   |   2 ++
 tools/perf/util/stat.c    |   3 +++
 tools/perf/util/stat.h    |   5 ++--
 6 files changed, 182 insertions(+), 6 deletions(-)

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[PATCH 0/4] perf stat: Enable group read of counters Jiri Olsa <jolsa@kernel.org> - 2017-07-21 14:20 +0200
  [PATCH 1/4] perf tools: Add verbose output for sys_perf_event_open fallback Jiri Olsa <jolsa@kernel.org> - 2017-07-21 14:20 +0200
    [tip:perf/core] perf evsel: Add verbose output for  sys_perf_event_open fallback tip-bot for Jiri Olsa <tipbot@zytor.com> - 2017-07-26 19:30 +0200
  [PATCH 3/4] perf tools: Add perf_evsel__read_counter function Jiri Olsa <jolsa@kernel.org> - 2017-07-21 14:20 +0200
    Re: [PATCH 3/4] perf tools: Add perf_evsel__read_counter function Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-07-26 03:50 +0200
      Re: [PATCH 3/4] perf tools: Add perf_evsel__read_counter function Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-07-26 03:50 +0200
      Re: [PATCH 3/4] perf tools: Add perf_evsel__read_counter function Jiri Olsa <jolsa@redhat.com> - 2017-07-26 09:40 +0200
  [PATCH 2/4] perf tools: Add perf_evsel__read_size function Jiri Olsa <jolsa@kernel.org> - 2017-07-21 14:20 +0200
  Re: [PATCH 0/4] perf stat: Enable group read of counters Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-07-21 19:10 +0200

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