[RFC V3 0/3] perf stat: improvements for handling of multiple PMUs

From: Agustin Vega-Frias
Date: Tue Mar 06 2018 - 09:05:09 EST


This series of patches adds some simple improvements to the way perf stat
handles PMUs that have multiple instances by:

1. Adding glob-like matching in addition to the prefix-based matching
introduced previously (patch 1).
2. Adding the ability to recover the PMU names when printing the events
separately with the --no-merge option (patch 2).
3. Restoring auto-merge for events created by prefix or glob-like match
(patch 3). Note that this still keeps the behavior that disables
auto-merging of legacy symbolic events (e.g. cycles).

V3:

- Consolidated prefix and glob matching into a single glob match with a
trailing * to maintain prefix matching and have more consistent behavior.
E.g., all of these match all the uncore_imc PMUs: imc, imc*, *imc, *imc*

V2:

- Updated the documentation to explain prefix and glob matching of PMU
names, and event auto-merging.
- Added sample output to the third patch.

Agustin Vega-Frias (3):
perf, tools: Support wildcards on pmu name in dynamic pmu events
perf, tools: Display pmu name when printing unmerged events in stat
perf pmu: Auto-merge PMU events created by prefix or glob match

tools/perf/Documentation/perf-list.txt | 8 +++++++-
tools/perf/Documentation/perf-stat.txt | 17 +++++++++++++++++
tools/perf/builtin-stat.c | 29 ++++++++++++++++++++++++++++-
tools/perf/util/evsel.c | 1 +
tools/perf/util/evsel.h | 1 +
tools/perf/util/parse-events.c | 21 ++++++++++-----------
tools/perf/util/parse-events.h | 2 +-
tools/perf/util/parse-events.l | 2 +-
tools/perf/util/parse-events.y | 23 ++++++++++++++---------
9 files changed, 80 insertions(+), 24 deletions(-)

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