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

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Date:   Tue,  6 Mar 2018 09:04:41 -0500
From:   Agustin Vega-Frias <agustinv@...eaurora.org>
To:     linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>
Cc:     timur@...eaurora.org, agustinv@...eaurora.org
Subject: [RFC V3 0/3] perf stat: improvements for handling of multiple PMUs

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(-)

--
Qualcomm Datacenter Technologies, Inc. on behalf of the Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.