linux-kernel - [PATCH v2 0/6] Add support for sysfs event.cpus and cpu event term

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Message-Id: <20240718003025.1486232-1-irogers@google.com>
Date: Wed, 17 Jul 2024 17:30:19 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>, 
	Kan Liang <kan.liang@...ux.intel.com>, Bjorn Helgaas <bhelgaas@...gle.com>, 
	Jonathan Corbet <corbet@....net>, James Clark <james.clark@....com>, 
	Ravi Bangoria <ravi.bangoria@....com>, Dominique Martinet <asmadeus@...ewreck.org>, 
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, 
	Dhananjay Ugwekar <Dhananjay.Ugwekar@....com>, ananth.narayan@....com, gautham.shenoy@....com, 
	kprateek.nayak@....com, sandipan.das@....com
Subject: [PATCH v2 0/6] Add support for sysfs event.cpus and cpu event term

The need for a sysfs event.cpus file is discussed here:
https://lore.kernel.org/lkml/CAP-5=fXXuWchzUK0n5KTH8kamr=DQoEni+bUoo8f-4j8Y+eMBg@mail.gmail.com/
following Dhananjay Ugwekar's work on the RAPL /sys/devices/power PMU.
These changes add support for the event.cpus file in sysfs and also a
cpu event term allowing events to have differing CPUs. This was added
in order to test the parsing and map propagation for the sysfs case.

v2: Add support for multiple cpu terms on an event that are
    merged. For example, an event of "l1d-misses/cpu=4,cpu=5/" will
    now be opened on both CPU 4 and 5 rather than just CPU 4.

Ian Rogers (6):
  perf pmu: Merge boolean sysfs event option parsing
  perf parse-events: Pass cpu_list as a perf_cpu_map in __add_event
  perf pmu: Add support for event.cpus files in sysfs
  libperf cpumap: Add ability to create CPU from a single CPU number
  perf parse-events: Set is_pmu_core for legacy hardware events
  perf parse-events: Add "cpu" term to set the CPU an event is recorded
    on

 .../sysfs-bus-event_source-devices-events     |  14 ++
 tools/lib/perf/cpumap.c                       |  10 ++
 tools/lib/perf/include/perf/cpumap.h          |   2 +
 tools/perf/Documentation/perf-list.txt        |   9 +
 tools/perf/util/evsel_config.h                |   1 +
 tools/perf/util/parse-events.c                | 162 ++++++++++++------
 tools/perf/util/parse-events.h                |   3 +-
 tools/perf/util/parse-events.l                |   1 +
 tools/perf/util/pmu.c                         |  92 +++++++---
 tools/perf/util/pmu.h                         |   1 +
 10 files changed, 221 insertions(+), 74 deletions(-)

-- 
2.45.2.1089.g2a221341d9-goog