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Date: Mon, 19 Sep 2016 09:58:10 -0700
From: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: peterz@...radead.org, maddy@...ux.vnet.ibm.com,
linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
Michael Ellerman <mpe@...erman.id.au>,
Jiri Olsa <jolsa@...hat.com>, mingo@...nel.org,
ak@...ux.intel.com, namhyung@...nel.org
Subject: Re: [PATCH v21 00/20] perf, tools: Add support for PMU events in
JSON format
I messed up the Cc list. Fixing it now.
Sukadev Bhattiprolu [sukadev@...ux.vnet.ibm.com] wrote:
> CPUs support a large number of performance monitoring events (PMU events)
> and often these events are very specific to an architecture/model of the
> CPU. To use most of these PMU events with perf, we currently have to identify
> them by their raw codes:
>
> perf stat -e r100f2 sleep 1
>
> This patchset allows architectures to specify these PMU events in JSON
> files located in 'tools/perf/pmu-events/arch/' of the mainline tree.
> The events from the JSON files for the architecture are then built into
> the perf binary.
>
> At run time, perf identifies the specific set of events for the CPU and
> creates "event aliases". These aliases allow users to specify events by
> "name" as:
>
> perf stat -e pm_1plus_ppc_cmpl sleep 1
>
> The file, 'tools/perf/pmu-events/README' in [PATCH 15/19] gives more
> details.
>
> Note:
> - All known events tables for the architecture are included in the
> perf binary.
>
> - For architectures that don't have any JSON files, an empty mapping
> table is created and they should continue to build.
>
> Thanks to input from Andi Kleen, Jiri Olsa, Namhyung Kim and Ingo Molnar.
>
> These patches are available from:
>
> https://github.com/sukadev/linux.git
>
> Branch Description
> ------------------------------------------------------
> json-code-v21 Source Code only
> json-code+data-v21 Both code and data (for build/test/pull)
>
> NOTE: Only "source code" patches (i.e those in json-code-v21) are being
> emailed. Please pull the json-code+data-v21 branch for build/test.
>
> Changelog[v21]
> - Rebase to recent perf/core
> - Group the PMU events supported by a CPU model into topics and
> create a separate JSON file for each topic for each CPU (code
> and input from Jiri Olsa).
>
> Changelog[v20]
> - Rebase to recent perf/core
> - Add Patch 20/20 to allow perf-stat to work with the period= field
>
> Changelog[v19]
> Rebase to recent perf/core; fix couple lines >80 chars.
>
> Changelog[v18]
> Rebase to recent perf/core; fix minor merge conflicts.
>
> Changelog[v17]
> Rebase to recent perf/core; couple of small fixes to processing Intel
> JSON files; allow case-insensitive PMU event names.
>
> Changelog[v16]
> Rebase to recent perf/core; fix minor merge conflicts; drop 3 patches
> that were merged into perf/core.
>
> Changelog[v15]
> Code changes:
> - Fix 'perf list' usage string and update man page.
> - Remove a redundant __maybe_unused tag.
> - Rebase to recent perf/core branch.
>
> Data files updates: json-files-5 branch
> - Rebase to perf/intel-json-files-5 from Andi Kleen
> - Add patch from Madhavan Srinivasan for couple more Powerpc models
>
> Changelog[v14]
> Comments from Jiri Olsa:
> - Change parameter name/type for pmu_add_cpu_aliases (from void *data
> to list_head *head)
> - Use asprintf() in file_name_to_tablename() and simplify/reorg code.
> - Use __weak definition from <linux/compile.h>
> - Use fopen() with mode "w" and eliminate unlink()
> - Remove minor TODO.
> - Add error check for return value from strdup() in print_pmu_events().
> - Move independent changes from patches 3,11,12 .. to separate patches
> for easier review/backport.
> - Clarify mapfile's "header line support" in patch description.
> - Fix build failure with DEBUG=1
>
> Comment from Andi Kleen:
> - In tools/perf/pmu-events/Build, check for 'mapfile.csv' rather than
> 'mapfile*'
>
> Misc:
> - Minor changes/clarifications to tools/perf/pmu-events/README.
>
>
> Changelog[v13]
> Version: Individual patches have their own history :-) that I am
> preserving. Patchset version (v13) is for overall patchset and is
> somewhat arbitrary.
>
> - Added support for "categories" of events to perf
> - Add mapfile, jevents build dependency on pmu-events.c
> - Silence jevents when parsing JSON files unless V=1 is specified
> - Cleanup error messages
> - Fix memory leak with ->cpuid
> - Rebase to Arnaldo's tree
> - Allow overriding CPUID via environment variable
> - Support long descriptions for events
> - Handle header line in mapfile.csv
> - Cleanup JSON files (trim PublicDescription if identical to/prefix of
> BriefDescription field)
>
>
> Andi Kleen (12):
> perf, tools: Add jsmn `jasmine' JSON parser
> perf, tools, jevents: Program to convert JSON file to C style file
> perf, tools: Support CPU id matching for x86 v2
> perf, tools: Support alias descriptions
> perf, tools: Query terminal width and use in perf list
> perf, tools: Add a --no-desc flag to perf list
> perf, tools: Add override support for event list CPUID
> perf, tools: Add support for event list topics
> perf, tools, jevents: Handle header line in mapfile
> perf, tools: Make alias matching case-insensitive
> perf, tools, pmu-events: Fix fixed counters on Intel
> perf, tools, pmu-events: Add Skylake frontend MSR support
>
> Sukadev Bhattiprolu (7):
> perf, tools: Use pmu_events table to create aliases
> perf, tools: Support CPU ID matching for Powerpc
> perf, tools, jevents: Add support for long descriptions
> perf, tools: Add alias support for long descriptions
> perf, tools: Support long descriptions with perf list
> perf, tools: Add README for info on parsing JSON/map files
> Allow period= in perf stat CPU event descriptions.
>
> tools/lib/subcmd/pager.c | 16 +
> tools/lib/subcmd/pager.h | 1 +
> tools/perf/Documentation/perf-list.txt | 12 +-
> tools/perf/Makefile.perf | 28 +-
> tools/perf/arch/powerpc/util/header.c | 11 +
> tools/perf/arch/x86/util/header.c | 24 +-
> tools/perf/builtin-list.c | 20 +-
> tools/perf/pmu-events/Build | 11 +
> tools/perf/pmu-events/README | 148 ++++++
> tools/perf/pmu-events/jevents.c | 811 +++++++++++++++++++++++++++++++++
> tools/perf/pmu-events/jevents.h | 18 +
> tools/perf/pmu-events/jsmn.c | 313 +++++++++++++
> tools/perf/pmu-events/jsmn.h | 67 +++
> tools/perf/pmu-events/json.c | 162 +++++++
> tools/perf/pmu-events/json.h | 42 ++
> tools/perf/pmu-events/pmu-events.h | 37 ++
> tools/perf/util/header.h | 1 +
> tools/perf/util/parse-events.c | 8 +-
> tools/perf/util/parse-events.h | 3 +-
> tools/perf/util/pmu.c | 177 ++++++-
> tools/perf/util/pmu.h | 6 +-
> 21 files changed, 1880 insertions(+), 36 deletions(-)
> create mode 100644 tools/perf/pmu-events/Build
> create mode 100644 tools/perf/pmu-events/README
> create mode 100644 tools/perf/pmu-events/jevents.c
> create mode 100644 tools/perf/pmu-events/jevents.h
> create mode 100644 tools/perf/pmu-events/jsmn.c
> create mode 100644 tools/perf/pmu-events/jsmn.h
> create mode 100644 tools/perf/pmu-events/json.c
> create mode 100644 tools/perf/pmu-events/json.h
> create mode 100644 tools/perf/pmu-events/pmu-events.h
>
> --
> 1.8.3.1
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