From: Ian Rogers <irogers@google.com>
To: Kan Liang <kan.liang@linux.intel.com>,
Thomas Richter <tmricht@linux.ibm.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>,
Bjorn Helgaas <bhelgaas@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Randy Dunlap <rdunlap@infradead.org>,
Jing Zhang <renyu.zj@linux.alibaba.com>,
James Clark <james.clark@arm.com>,
Ravi Bangoria <ravi.bangoria@amd.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org
Cc: Ian Rogers <irogers@google.com>
Subject: [PATCH v3 0/6] Assume sysfs event names are always the same case
Date: Mon, 29 Apr 2024 13:02:19 -0700 [thread overview]
Message-ID: <20240429200225.1271876-1-irogers@google.com> (raw)
By assuming sysfs events are either upper or lower case, the case
insensitive event parsing can probe for the existence of files 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@google.com/
v2: addresses review feedback from Kan Liang, by updating
documentation and adding tests.
v3: incorporate feedback from Thomas Richter <tmricht@linux.ibm.com>
that s390 event names are all upper case. Do a lower case probe
then an upper case probe, make documentation and tests also agree.
Ian Rogers (6):
perf test pmu-events: Make it clearer that pmu-events tests json
events
perf Document: Sysfs event names must be lower or upper 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 the same case
perf pmu: Assume sysfs events are always the same case
.../sysfs-bus-event_source-devices-events | 6 +
tools/perf/tests/pmu-events.c | 2 +-
tools/perf/tests/pmu.c | 457 ++++++++++++------
tools/perf/util/parse-events.c | 2 +-
tools/perf/util/parse-events.h | 2 +-
tools/perf/util/pmu.c | 111 +++--
tools/perf/util/pmu.h | 4 +-
tools/perf/util/pmus.c | 16 +-
tools/perf/util/pmus.h | 2 +
9 files changed, 405 insertions(+), 197 deletions(-)
--
2.44.0.769.g3c40516874-goog
next reply other threads:[~2024-04-29 20:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 20:02 Ian Rogers [this message]
2024-04-29 20:02 ` [PATCH v3 1/6] perf test pmu-events: Make it clearer that pmu-events tests json events Ian Rogers
2024-04-29 20:02 ` [PATCH v3 2/6] perf Document: Sysfs event names must be lower or upper case Ian Rogers
2024-04-29 20:02 ` [PATCH v3 3/6] perf test pmu: Refactor format test and exposed test APIs Ian Rogers
2024-05-01 3:06 ` kernel test robot
2024-04-29 20:02 ` [PATCH v3 4/6] perf test pmu: Add an eagerly loaded event test Ian Rogers
2024-05-01 3:05 ` kernel test robot
2024-04-29 20:02 ` [PATCH v3 5/6] perf test pmu: Test all sysfs PMU event names are the same case Ian Rogers
2024-04-29 20:02 ` [PATCH v3 6/6] perf pmu: Assume sysfs events are always " Ian Rogers
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