Changes in Build

8a54784e - perf build: Add pylint build tests

Tue, 11 Mar 2025 21:36:26 +0000

perf build: Add pylint build testsIf PYLINT=1 is passed to the build then run pylint over python code inperf. Unlike shellcheck this isn't default on as there are currentlytoo many errors.An example of an error:```************* Module setuputil/setup.py:19:0: C0301: Line too long (127/100) (line-too-long)util/setup.py:20:0: C0301: Line too long (138/100) (line-too-long)util/setup.py:63:0: C0301: Line too long (106/100) (line-too-long)util/setup.py:1:0: C0114: Missing module docstring (missing-module-docstring)util/setup.py:24:4: W0622: Redefining built-in 'vars' (redefined-builtin)util/setup.py:11:4: C0103: Constant name "cc_options" doesn't conform to UPPER_CASE naming style (invalid-name)util/setup.py:13:4: C0103: Constant name "cc_options" doesn't conform to UPPER_CASE naming style (invalid-name)util/setup.py:15:34: R1732: Consider using 'with' for resource-allocating operations (consider-using-with)util/setup.py:18:0: C0116: Missing function or method docstring (missing-function-docstring)util/setup.py:19:16: R1732: Consider using 'with' for resource-allocating operations (consider-using-with)util/setup.py:44:0: C0413: Import "from setuptools import setup, Extension" should be placed at the top of the module (wrong-import-position)util/setup.py:46:0: C0413: Import "from setuptools.command.build_ext import build_ext as _build_ext" should be placed at the top of the module (wrong-import-position)util/setup.py:47:0: C0413: Import "from setuptools.command.install_lib import install_lib as _install_lib" should be placed at the top of the module (wrong-import-position)util/setup.py:49:0: C0115: Missing class docstring (missing-class-docstring)util/setup.py:49:0: C0103: Class name "build_ext" doesn't conform to PascalCase naming style (invalid-name)util/setup.py:52:8: W0201: Attribute 'build_lib' defined outside __init__ (attribute-defined-outside-init)util/setup.py:53:8: W0201: Attribute 'build_temp' defined outside __init__ (attribute-defined-outside-init)util/setup.py:55:0: C0115: Missing class docstring (missing-class-docstring)util/setup.py:55:0: C0103: Class name "install_lib" doesn't conform to PascalCase naming style (invalid-name)util/setup.py:58:8: W0201: Attribute 'build_dir' defined outside __init__ (attribute-defined-outside-init)*-----------------------------------------------------------------Your code has been rated at 6.67/10 (previous run: 6.51/10, +0.16)make[4]: *** [util/Build:442: util/setup.py.pylint_log] Error 1```Reviewed-by: James Clark Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250311213628.569562-5-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/perf/pmu-events/Build

168910d0 - perf build: Add mypy build tests

Tue, 11 Mar 2025 21:36:25 +0000

perf build: Add mypy build testsIf MYPY=1 is passed to the build then run mypy over python code inperf. Unlike shellcheck this isn't default on as there are currentlytoo many errors.An example of an error:```util/setup.py:8: error: Item "None" of "str | None" has no attribute "split" [union-attr]util/setup.py:15: error: Item "None" of "IO[bytes] | None" has no attribute "readline" [union-attr]util/setup.py:15: error: List item 0 has incompatible type "str | None"; expected "str | bytes | PathLike[str] | PathLike[bytes]" [list-item]util/setup.py:16: error: Unsupported left operand type for + ("None") [operator]util/setup.py:16: note: Left operand is of type "str | None"util/setup.py:74: error: Unsupported left operand type for + ("None") [operator]util/setup.py:74: note: Left operand is of type "str | None"Found 5 errors in 1 file (checked 1 source file)make[4]: *** [util/Build:430: util/setup.py.mypy_log] Error 1```Reviewed-by: James Clark Signed-off-by: Ian Rogers Link: https://lore.kernel.org/r/20250311213628.569562-4-irogers@google.comSigned-off-by: Namhyung Kim List of files: /linux-6.15/tools/perf/pmu-events/Build

b79f9a43 - perf pmu-events: Change dependencies for empty-pmu-events.c test

Mon, 05 Aug 2024 19:44:21 +0000

perf pmu-events: Change dependencies for empty-pmu-events.c testSwitch from $? (all the prerequisites that are newer than the target)to $^ (all the prerequisites) as touching jevents.py will mean thatempty-pmu-events.c won't be passed to the diff command breaking thebuild.Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Adrian Hunter Cc: Albert Ou Cc: Alexander Shishkin Cc: Atish Patra Cc: Changbin Du Cc: Charles Ci-Jyun Wu Cc: Eric Lin Cc: Greentime Hu Cc: Guilherme Amadio Cc: Ingo Molnar Cc: Inochi Amaoto Cc: James Clark Cc: Ji Sheng Teoh Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Leo Yan Cc: Locus Wei-Han Chen Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Palmer Dabbelt Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Samuel Holland Cc: Sandipan Das Cc: Vincent Chen Cc: Will Deacon Cc: Xu Yang Link: https://lore.kernel.org/r/20240805194424.597244-2-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

0fe881f1 - perf jevents: Autogenerate empty-pmu-events.c

Tue, 30 Jul 2024 19:17:44 +0000

perf jevents: Autogenerate empty-pmu-events.cempty-pmu-events.c exists so that builds may occur without pythonbeing installed on a system. Manually updating empty-pmu-events.c tobe in sync with jevents.py is a pain, let's use jevents.py to generateempty-pmu-events.c.1) change jevents.py so that an arch and model of none cause generation of a pmu-events.c without any json. Add a SPDX and autogenerated warning to the start of the file.2) change Build so that if a generated pmu-events.c for arch none and model none doesn't match empty-pmu-events.c the build fails with a cat of the differences. Update Makefile.perf to clean up the files used for this.3) update empty-pmu-events.c to match the output of jevents.py with arch and mode of none.Committer notes:The firtst paragraph is confusing, so I asked and Ian further clarified: ---The requirement for python hasn't changed.Case 1: no python or NO_JEVENTS=1Build happens using empty-pmu-events.c that is checked in, no pythonis required.Case 2: pythonpmu-events.c is created by jevents.py (requiring python) and then built.This change adds a step where the empty-pmu-events.c is created usingjevents.py and that file is diffed against the checked in version.This stops the checked in empty-pmu-events.c diverging if changes aremade to jevents.py. If the diff causes the build to fail then you justcopy the diff empty-pmu-events.c over the checked in one. ---Reviewed-by: John Garry Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jing Zhang Cc: Jiri Olsa Cc: Kan Liang Cc: Mark Rutland Cc: Namhyung Kim Cc: Oliver Sang Cc: Peter Zijlstra Cc: Philip Li Cc: Sandipan Das Cc: Weilin Wang Cc: Xu Yang Link: https://lore.kernel.org/r/20240730191744.3097329-3-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

7822a891 - perf build: Update build rule for generated files

Fri, 28 Jul 2023 02:24:46 +0000

perf build: Update build rule for generated filesThe bison and flex generate C files from the source (.y and .l)files. When O= option is used, they are saved in a separate directorybut the default build rule assumes the .C files are in the sourcedirectory. So it might read invalid file if there are generated filesfrom an old version. The same is true for the pmu-events files.For example, the following command would cause a build failure: $ git checkout v6.3 $ make -C tools/perf # build in the same directory $ git checkout v6.5-rc2 $ mkdir build # create a build directory $ make -C tools/perf O=build # build in a different directory but it # refers files in the source directoryLet's update the build rule to specify those cases explicitly to dependon the files in the output directory.Note that it's not a complete fix and it needs the next patch for theinclude path too.Fixes: 80eeb67fe577aa76 ("perf jevents: Program to convert JSON file")Signed-off-by: Namhyung Kim Cc: Adrian Hunter Cc: Andi Kleen Cc: Anup Sharma Cc: Ian Rogers Cc: Ingo Molnar Cc: Jiri Olsa Cc: Peter Zijlstra Cc: stable@vger.kernel.orgLink: https://lore.kernel.org/r/20230728022447.1323563-1-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

b777b3d2 - perf jevents: Run metric_test.py at compile-time

Thu, 26 Jan 2023 23:36:45 +0000

perf jevents: Run metric_test.py at compile-timeAdd a target that generates a log file for running metric_test.py andmake this a dependency on generating pmu-events.c. The log output isdisplayed if the test fails like (the test was modified to make itfail):``` TEST /tmp/perf/pmu-events/metric_test.logF......======================================================================FAIL: test_Brackets (__main__.TestMetricExpressions)----------------------------------------------------------------------Traceback (most recent call last): File "tools/perf/pmu-events/metric_test.py", line 33, in test_Brackets self.assertEqual((a * b + c).ToPerfJson(), 'a * b + d')AssertionError: 'a * b + c' != 'a * b + d'- a * b + c? ^+ a * b + d? ^----------------------------------------------------------------------Ran 7 tests in 0.004sFAILED (failures=1)make[3]: *** [pmu-events/Build:32: /tmp/perf/pmu-events/metric_test.log] Error 1```However, normal execution will just show the TEST line.This is roughly modeled on fortify testing in the kernel lib directory.Modify metric_test.py so that it is executable. This is necessary whenPYTHON isn't specified in the build, the normal case.Use variables to make the paths to files clearer and more consistent.Committer notes:Add pmu-events/metric_test.log to tools/perf/.gitignore and to the'clean' target on tools/perf/Makefile.perf.Reviewed-by: Kajol Jain Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Caleb Biggers Cc: Florian Fischer Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Kang Minchul Cc: Kim Phillips Cc: Leo Yan Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Perry Taylor Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Rob Herring Cc: Sandipan Das Cc: Stephane Eranian Cc: Will Deacon Cc: Xing Zhengjun Cc: linux-arm-kernel@lists.infradead.orgCc: linuxppc-dev@lists.ozlabs.orgLink: https://lore.kernel.org/r/20230126233645.200509-16-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

5a09b1fd - perf jevents: Add model list option

Thu, 26 Jan 2023 23:36:41 +0000

perf jevents: Add model list optionThis allows the set of generated jevents events and metrics be limitedto a subset of the model names. Appropriate if trying to minimize thebinary size where only a set of models are possible.Reviewed-by: Kajol Jain Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Caleb Biggers Cc: Florian Fischer Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jing Zhang Cc: Jiri Olsa Cc: John Garry Cc: Kan Liang Cc: Kang Minchul Cc: Kim Phillips Cc: Leo Yan Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Perry Taylor Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Rob Herring Cc: Sandipan Das Cc: Stephane Eranian Cc: Will Deacon Cc: Xing Zhengjun Cc: linux-arm-kernel@lists.infradead.orgCc: linuxppc-dev@lists.ozlabs.orgLink: https://lore.kernel.org/r/20230126233645.200509-12-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

40769665 - perf jevents: Parse metrics during conversion

Wed, 07 Dec 2022 05:59:08 +0000

perf jevents: Parse metrics during conversionCurrently the 'MetricExpr' json value is passed from the jsonfile to the pmu-events.c. This change introduces an expressiontree that is parsed into. The parsing is done largely by usingoperator overloading and python's 'eval' function. Two advantagesin doing this are:1) Broken metrics fail at compile time rather than relying on `perf test` to detect. `perf test` remains relevant for checking event encoding and actual metric use.2) The conversion to a string from the tree can minimize the metric's string size, for example, preferring 1e6 over 1000000, avoiding multiplication by 1 and removing unnecessary whitespace. On x86 this reduces the string size by 2,930bytes (0.07%).In future changes it would be possible to programmaticallygenerate the json expressions (a single line of text and so apain to write manually) for an architecture using the expressiontree. This could avoid copy-pasting metrics for all architecturevariants.v4. Doesn't simplify "0*SLOTS" to 0, as the pattern is used to fix Intel metrics with topdown events.v3. Avoids generic types on standard types like set that aren't supported until Python 3.9, fixing an issue with Python 3.6 reported-by John Garry. v3 also fixes minor pylint issues and adds a call to Simplify on the read expression tree.v2. Improvements to type information.Committer notes:Added one-line fixer from Ian, see first Link: tag below.Signed-off-by: Ian Rogers Reviewed-by: John Garry Cc: Alexander Shishkin Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Sumanth Korikkar Cc: Thomas Richter Link: https://lore.kernel.org/r/CAP-5=fWa=zNK_ecpWGoGggHCQx7z-oW0eGMQf19Maywg0QK=4g@mail.gmail.comLink: https://lore.kernel.org/r/20221207055908.1385448-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

b4f04660 - perf jevents: Add JEVENTS_ARCH make option

Thu, 04 Aug 2022 22:18:02 +0000

perf jevents: Add JEVENTS_ARCH make optionAllow the architecture built into pmu-events.c to be set on the makecommand line with JEVENTS_ARCH.Reviewed-by: John Garry Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: James Clark Cc: Jiri Olsa Cc: Kan Liang Cc: Leo Yan Cc: Mark Rutland Cc: Mike Leach Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Stephane Eranian Cc: Will Deacon Cc: Xing Zhengjun Cc: linux-arm-kernel@lists.infradead.orgLink: http://lore.kernel.org/lkml/20220804221816.1802790-4-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

5a059790 - perf jevents: Remove jevents.c

Wed, 29 Jun 2022 18:25:05 +0000

perf jevents: Remove jevents.cRemove files and build rules.Remove test for comparing with jevents.py as there is no longer a binaryto compare with.Signed-off-by: Ian Rogers Tested-by: John Garry Cc: Alexander Shishkin Cc: Ananth Narayan Cc: Andi Kleen Cc: Andrew Kilroy Cc: Caleb Biggers Cc: Felix Fietkau Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kajol Jain Cc: Kan Liang Cc: Kshipra Bopardikar Cc: Like Xu Cc: Mark Rutland Cc: Mathieu Poirier Cc: Namhyung Kim Cc: Nick Forrington Cc: Paul Clarke Cc: Perry Taylor Cc: Peter Zijlstra Cc: Qi Liu Cc: Ravi Bangoria Cc: Sandipan Das Cc: Santosh Shukla Cc: Stephane Eranian Cc: Will Deacon Cc: Xing Zhengjun Link: https://lore.kernel.org/r/20220629182505.406269-5-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

00facc76 - perf jevents: Switch build to use jevents.py

Wed, 29 Jun 2022 18:25:04 +0000

perf jevents: Switch build to use jevents.pyGenerate pmu-events.c using jevents.py rather than the binary built fromjevents.c.Add a new config variable NO_JEVENTS that is set when there is noarchitecture json or an appropriate python interpreter isn't present.When NO_JEVENTS is defined the file pmu-events/empty-pmu-events.c iscopied and used as the pmu-events.c file.Signed-off-by: Ian Rogers Tested-by: John Garry Cc: Alexander Shishkin Cc: Ananth Narayan Cc: Andi Kleen Cc: Andrew Kilroy Cc: Caleb Biggers Cc: Felix Fietkau Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Kajol Jain Cc: Kan Liang Cc: Kshipra Bopardikar Cc: Like Xu Cc: Mark Rutland Cc: Mathieu Poirier Cc: Namhyung Kim Cc: Nick Forrington Cc: Paul Clarke Cc: Perry Taylor Cc: Peter Zijlstra Cc: Qi Liu Cc: Ravi Bangoria Cc: Sandipan Das Cc: Santosh Shukla Cc: Stephane Eranian Cc: Will Deacon Cc: Xing Zhengjun Link: https://lore.kernel.org/r/20220629182505.406269-4-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

517db3b5 - perf jevents: Make build dependency on test JSONs

Tue, 03 Aug 2021 07:44:09 +0000

perf jevents: Make build dependency on test JSONsCurrently all JSONs and the mapfile for an arch are dependencies forbuilding pmu-events.cThe test JSONs are missing as a dependency, so add them.Signed-off-by: John Garry Reported-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Ian Rogers Cc: Jin Yao Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Cc: linuxarm@huawei.comLink: http://lore.kernel.org/lkml/90094733-741c-50e5-ac7d-f5640b5f0bdd@huawei.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

6fdbd824 - tools: build: Fixup host c flags

Tue, 10 Jul 2018 00:45:56 +0000

tools: build: Fixup host c flagsCommit 0c3b7e42616f ("tools build: Add support for host programs format")introduced host_c_flags which referenced CHOSTFLAGS. The actual name of thevariable is HOSTCFLAGS. Fix this up.Fixes: 0c3b7e42616f ("tools build: Add support for host programs format")Signed-off-by: Laura Abbott Acked-by: Jiri Olsa Signed-off-by: Masahiro Yamada List of files: /linux-6.15/tools/perf/pmu-events/Build

e9d32c1b - perf vendor events: Add support for arch standard events

Thu, 08 Mar 2018 10:58:32 +0000

perf vendor events: Add support for arch standard eventsFor some architectures (like arm), there are architecture- definedevents. Sometimes these events may be "recommended" according to thearchitecture standard, in that the implementer is free ignore the"recommendation" and create its custom event.This patch adds support for parsing standard events from arch-definedJSONs, and fixing up vendor events when they have implemented theseevents as standard.Support is also ensured that the vendor may implement their own customevents.A new step is added to the pmu events parsing to fix up the vendorevents with the arch-standard events.The arch-defined JSONs must be placed in the arch root folder forpreprocessing prior to tree JSON processing.In the vendor JSON, to specify that the arch event is supported, thekeyword "ArchStdEvent" should be used, like this:[ { "ArchStdEvent": "L1D_CACHE_WR", },]Matching is based on the "EventName" field in the architecture JSON.No other JSON objects are strictly required. However, for other objectsadded, these take precedence over architecture defined standard events,thus supporting separate events which have the same event code.Signed-off-by: John Garry Cc: Alexander Shishkin Cc: Andi Kleen Cc: Ganapatrao Kulkarni Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Shaokun Zhang Cc: Will Deacon Cc: William Cohen Cc: linux-arm-kernel@lists.infradead.orgCc: linuxarm@huawei.comLink: http://lkml.kernel.org/r/1520506716-197429-8-git-send-email-john.garry@huawei.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

7a759cd8 - perf tools: Fix build with ARCH=x86_64

Mon, 10 Apr 2017 03:02:37 +0000

perf tools: Fix build with ARCH=x86_64With commit: 0a943cb10ce78 (tools build: Add HOSTARCH Makefile variable)when building for ARCH=x86_64, ARCH=x86_64 is passed to perf instead ofARCH=x86, so the perf build process searchs header files fromtools/arch/x86_64/include, which doesn't exist.The following build failure is seen: In file included from util/event.c:2:0: tools/include/uapi/linux/mman.h:4:27: fatal error: uapi/asm/mman.h: No such file or directory compilation terminated.Fix this issue by using SRCARCH instead of ARCH in perf, just like themain kernel Makefile and tools/objtool's.Signed-off-by: Jiada Wang Tested-by: Arnaldo Carvalho de Melo Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Andi Kleen Cc: Eugeniu Rosca Cc: Jan Stancek Cc: Masami Hiramatsu Cc: Peter Zijlstra Cc: Ravi Bangoria Cc: Rui Teng Cc: Sukadev Bhattiprolu Cc: Wang Nan Fixes: 0a943cb10ce7 ("tools build: Add HOSTARCH Makefile variable")Link: http://lkml.kernel.org/r/1491793357-14977-2-git-send-email-jiada_wang@mentor.comSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build

80eeb67f - perf jevents: Program to convert JSON file

Mon, 19 Sep 2016 20:39:33 +0000

perf jevents: Program to convert JSON fileThis is a modified version of an earlier patch by Andi Kleen.We expect architectures to create JSON files describing the performancemonitoring (PMU) events that each CPU model/family of the architecturesupports.Following is an example of the JSON file entry for an x86 event: [ ... { "EventCode": "0x00", "UMask": "0x01", "EventName": "INST_RETIRED.ANY", "BriefDescription": "Instructions retired from execution.", "PublicDescription": "Instructions retired from execution.", "Counter": "Fixed counter 1", "CounterHTOff": "Fixed counter 1", "SampleAfterValue": "2000003", "SampleAfterValue": "2000003", "MSRIndex": "0", "MSRValue": "0", "TakenAlone": "0", "CounterMask": "0", "Invert": "0", "AnyThread": "0", "EdgeDetect": "0", "PEBS": "0", "PRECISE_STORE": "0", "Errata": "null", "Offcore": "0" }, ... ]All the PMU events supported by a CPU model/family must be grouped into"topics" such as "Pipelining", "Floating-point", "Virtual-memory" etc.All events belonging to a topic must be placed in a separate JSON file(eg: "Pipelining.json") and all the topic JSON files for a CPU model mustbe in a separate directory. Eg: for the CPU model "Silvermont_core": $ ls tools/perf/pmu-events/arch/x86/Silvermont_core Floating-point.json Memory.json Other.json Pipelining.json Virtualmemory.jsonFinally, to allow multiple CPU models to share a single set of JSON files,architectures must provide a mapping between a model and its set of events: $ grep Silvermont tools/perf/pmu-events/arch/x86/mapfile.csv GenuineIntel-6-4D,V13,Silvermont_core,core GenuineIntel-6-4C,V13,Silvermont_core,corewhich maps each CPU, identified by [vendor, family, model, version, type]to a directory of JSON files. Thus two (or more) CPU models support theset of PMU events listed in the directory. tools/perf/pmu-events/arch/x86/Silvermont_core/Given this organization of files, the program, jevents: - locates all JSON files for each CPU-model of the architecture, - parses all JSON files for the CPU-model and generates a C-style "PMU-events table" (pmu-events.c) for the model - locates a mapfile for the architecture - builds a global table, mapping each model of CPU to the corresponding PMU-events table.The 'pmu-events.c' is generated when building perf and added to libperf.a.The global table pmu_events_map[] table in this pmu-events.c will be usedin perf in a follow-on patch.If the architecture does not have any JSON files or there is an error inprocessing them, an empty mapping file is created. This would allow thebuild of perf to proceed even if we are not able to provide aliases forevents.The parser for JSON files allows parsing Intel style JSON event files. Thisallows to use an Intel event list directly with perf. The Intel event listscan be quite large and are too big to store in unswappable kernel memory.The conversion from JSON to C-style is straight forward. The parser knows(very little) Intel specific information, and can be easily extended tohandle fields for other CPUs.The parser code is partially shared with an independent parsing library,which is 2-clause BSD licensed. To avoid any conflicts I marked thosefiles as BSD licensed too. As part of perf they become GPLv2.Committer notes:Fixes:1) Limit maxfds to 512 to avoid nftd() segfaulting on alloca() with a big rlim_max, as in docker containers - acme2) Make jevents a hostprog, supporting cross compilation - jolsa3) Use HOSTCC for jevents final step - acme4) Define _GNU_SOURCE for asprintf, as we can't use CC's EXTRA_CFLAGS, that has to have --sysroot on the Android NDK 24 - acme5) Removed $(srctree)/tools/perf/pmu-events/pmu-events.c from the 'clean' target, it is generated on $(OUTPUT)pmu-events/pmu-events.c, which is already taken care of in the original patch - acmeSigned-off-by: Andi Kleen Signed-off-by: Jiri Olsa Signed-off-by: Sukadev Bhattiprolu Tested-by: Arnaldo Carvalho de Melo Acked-by: Ingo Molnar Cc: Peter Zijlstra Cc: Madhavan Srinivasan Cc: linuxppc-dev@lists.ozlabs.orgLink: http://lkml.kernel.org/r/1473978296-20712-3-git-send-email-sukadev@linux.vnet.ibm.comLink: http://lkml.kernel.org/r/20160927141846.GA6589@kravaSigned-off-by: Arnaldo Carvalho de Melo List of files: /linux-6.15/tools/perf/pmu-events/Build