[PATCH v2 0/6] Assume sysfs event names are always lowercase

[Ian Rogers]

By assuming sysfs events are lower case, the case insensitive event
parsing can probe for the existence of a file rather then loading all
events in a directory. When the event is a json event like
inst_retired.any on Intel, this reduces the number of openat calls on
a Tigerlake laptop from 325 down to 255.

v1 sent as an RFC:
    https://lore.kernel.org/lkml/20240413040812.4042051-1-irogers@xxxxxxxxxx/

v2: addresses review feedback from Kan Liang, by updating
    documentation and adding tests.

Ian Rogers (6):
  perf test pmu-events: Make it clearer that pmu-events tests json
    events
  perf Document: Capture that sysfs event names must be lower case
  perf test pmu: Refactor format test and exposed test APIs
  perf test pmu: Add an eagerly loaded event test
  perf test pmu: Test all sysfs PMU event names are lowercase
  perf pmu: Assume sysfs events are always lowercase

 .../sysfs-bus-event_source-devices-events     |   6 +
 tools/perf/tests/pmu-events.c                 |   2 +-
 tools/perf/tests/pmu.c                        | 444 +++++++++++-------
 tools/perf/util/parse-events.c                |   2 +-
 tools/perf/util/parse-events.h                |   2 +-
 tools/perf/util/pmu.c                         |  97 ++--
 tools/perf/util/pmu.h                         |   4 +-
 tools/perf/util/pmus.c                        |  16 +-
 tools/perf/util/pmus.h                        |   2 +
 9 files changed, 377 insertions(+), 198 deletions(-)

-- 
2.44.0.769.g3c40516874-goog