Messages in this thread | | | From | kan.liang@intel ... | Subject | [PATCH RFC V4 0/4] per event callgrap and time support | Date | Thu, 16 Jul 2015 04:26:06 -0400 |
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From: Kan Liang <kan.liang@intel.com>
This patchkit adds the ability to turn off callgraphs and time stamps per event. This in term can reduce sampling overhead and the size of the perf.data.
Changes since V1: - Break up V1 patches into three patches(parse option changes, partial time support and partial callgrap support). - Use strings 'fp,dwarf,lbr,no' to identify callchains - Add test case in parse-events.c
Changes since V2: - Rebase on 60cd37eb10
Changes since V3: - Replace OPT_CALLBACK_SET by current existing callback mechanism. - Using perf_evsel__set_sample_bit if possible - Change the expression "partial" to "per event" - Using global variable to indicate if 'time' is set per event. If 'time' is not set, enable it by default for perf record.
Kan Liang (4): perf,tools: introduce callgraph_set for callgraph option perf,tool: per-event time support perf,tool: per-event callgrap support perf,tests: Add tests to callgrap and time parse
tools/perf/Documentation/perf-record.txt | 8 ++++- tools/perf/builtin-record.c | 13 ++++++-- tools/perf/builtin-trace.c | 1 + tools/perf/perf.h | 1 + tools/perf/tests/parse-events.c | 28 +++++++++++++++++ tools/perf/util/evsel.c | 54 ++++++++++++++++++++++++++++++-- tools/perf/util/parse-events.c | 29 +++++++++++++++++ tools/perf/util/parse-events.h | 5 +++ tools/perf/util/parse-events.l | 3 ++ tools/perf/util/pmu.c | 3 +- 10 files changed, 137 insertions(+), 8 deletions(-)
-- 1.8.3.1
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