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ffc606ada3
jevents.c is large, has a dependency on an old forked version of jsmn,
and is challenging to work upon. A lot of jevents.c's complexity comes
from needing to write json and csv parsing from first principles. In
contrast python has this functionality in standard libraries and is
already a build pre-requisite for tools like asciidoc (that builds all
of the perf man pages).
Introduce jevents.py that produces identical output to jevents.c. Add a
test that runs both converter tools and validates there are no output
differences. The test can be invoked with a phony build target like:
$ make -C tools/perf jevents-py-test
The python code deliberately tries to replicate the behavior of
jevents.c so that the output matches and transitioning tools shouldn't
introduce regressions. In some cases the code isn't as elegant as hoped,
but fixing this can be done as follow up.
Committer testing:
$ make -C tools/perf jevents-py-test
make: Entering directory '/var/home/acme/git/perf/tools/perf'
BUILD: Doing 'make -j32' parallel build
HOSTCC fixdep.o
HOSTLD fixdep-in.o
LINK fixdep
Auto-detecting system features:
... dwarf: [ on ]
... dwarf_getlocations: [ on ]
... glibc: [ on ]
... libbfd: [ on ]
... libbfd-buildid: [ on ]
... libcap: [ on ]
... libelf: [ on ]
... libnuma: [ on ]
... numa_num_possible_cpus: [ on ]
... libperl: [ on ]
... libpython: [ on ]
... libcrypto: [ OFF ]
... libunwind: [ on ]
... libdw-dwarf-unwind: [ on ]
... zlib: [ on ]
... lzma: [ on ]
... get_cpuid: [ on ]
... bpf: [ on ]
... libaio: [ on ]
... libzstd: [ on ]
... disassembler-four-args: [ on ]
HOSTCC pmu-events/json.o
HOSTCC pmu-events/jsmn.o
HOSTCC pmu-events/jevents.o
HOSTLD pmu-events/jevents-in.o
LINK pmu-events/jevents
Checking architecture: arm64
Generating using jevents.c
Generating using jevents.py
Diffing
Checking architecture: nds32
Generating using jevents.c
Generating using jevents.py
Diffing
Checking architecture: powerpc
Generating using jevents.c
Generating using jevents.py
Diffing
Checking architecture: s390
Generating using jevents.c
Generating using jevents.py
Diffing
Checking architecture: x86
Generating using jevents.c
Generating using jevents.py
Diffing
make: Leaving directory '/var/home/acme/git/perf/tools/perf'
$
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: John Garry <john.garry@huawei.com>
Tested-by: Thomas Richter <tmricht@linux.ibm.com>
Tested-by: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ananth Narayan <ananth.narayan@amd.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrew Kilroy <andrew.kilroy@arm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Felix Fietkau <nbd@nbd.name>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kshipra Bopardikar <kshipra.bopardikar@intel.com>
Cc: Like Xu <likexu@tencent.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Forrington <nick.forrington@arm.com>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qi Liu <liuqi115@huawei.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Santosh Shukla <santosh.shukla@amd.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220629182505.406269-3-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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| debugging | ||
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| include | ||
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| perf | ||
| power | ||
| rcu | ||
| scripts | ||
| spi | ||
| testing | ||
| thermal | ||
| time | ||
| tracing | ||
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| wmi | ||
| Makefile | ||