Messages in this thread | | | From | Jiri Olsa <> | Subject | [PATCHv2 0/4] perf stat: Enable group read of counters | Date | Wed, 26 Jul 2017 14:02:03 +0200 |
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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.
v2 changes: - fixed release segfault reported by Arnaldo - rebased to latest Arnaldo's perf/core - patch 1 already merged in
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 (3): 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 | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++- tools/perf/util/evsel.h | 2 ++ tools/perf/util/stat.c | 4 +++ tools/perf/util/stat.h | 5 ++-- 6 files changed, 175 insertions(+), 6 deletions(-)
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