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AFNElJ9jDBCZyezoki7jkitWq6rWOh1vApJtcXP3ujjje/l7mOoIzEUKBx2ZdZ9uT7zwZCXOLE3qS1wIypHzfDMtRg0r@vger.kernel.org X-Gm-Message-State: AOJu0Yzmyld/AnbMlDpDGQYDlMhfd4jwrP4NKRu7YKAODgvGn4KSD0Xp kcbDX3fG3LopYR9zeRRIQouUTAtQhc3pPd0teHmhcO7TzhRs5rpC8QhwagOzxvE0lZe9SfMGv7k /BRJJZdrAhA== X-Received: from dybrp14.prod.google.com ([2002:a05:7301:460e:b0:2ca:9b08:e7c9]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7301:1291:b0:2ea:5057:a333 with SMTP id 5a478bee46e88-2ea5057b8dfmr6524277eec.15.1776916537748; Wed, 22 Apr 2026 20:55:37 -0700 (PDT) Date: Wed, 22 Apr 2026 20:54:27 -0700 In-Reply-To: <20260419235911.2186050-27-irogers@google.com> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260419235911.2186050-27-irogers@google.com> X-Mailer: git-send-email 2.54.0.rc2.533.g4f5dca5207-goog Message-ID: <20260423035526.1537178-1-irogers@google.com> Subject: [PATCH v2 00/58] perf: Reorganize scripting support From: Ian Rogers To: irogers@google.com, acme@kernel.org, adrian.hunter@intel.com, james.clark@linaro.org, leo.yan@linux.dev, namhyung@kernel.org, tmricht@linux.ibm.com Cc: 9erthalion6@gmail.com, adityab1@linux.ibm.com, alexandre.chartre@oracle.com, alice.mei.rogers@gmail.com, ankur.a.arora@oracle.com, ashelat@redhat.com, atrajeev@linux.ibm.com, blakejones@google.com, changbin.du@huawei.com, chuck.lever@oracle.com, collin.funk1@gmail.com, coresight@lists.linaro.org, ctshao@google.com, dapeng1.mi@linux.intel.com, derek.foreman@collabora.com, dsterba@suse.com, gautam@linux.ibm.com, howardchu95@gmail.com, john.g.garry@oracle.com, jolsa@kernel.org, jonathan.cameron@huawei.com, justinstitt@google.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, mike.leach@arm.com, mingo@redhat.com, morbo@google.com, nathan@kernel.org, nichen@iscas.ac.cn, nick.desaulniers+lkml@gmail.com, pan.deng@intel.com, peterz@infradead.org, ravi.bangoria@amd.com, ricky.ringler@proton.me, stephen.s.brennan@oracle.com, sun.jian.kdev@gmail.com, suzuki.poulose@arm.com, swapnil.sapkal@amd.com, tanze@kylinos.cn, terrelln@fb.com, thomas.falcon@intel.com, tianyou.li@intel.com, tycho@kernel.org, wangyang.guo@intel.com, xiaqinxin@huawei.com, yang.lee@linux.alibaba.com, yuzhuo@google.com, zhiguo.zhou@intel.com, zli94@ncsu.edu Content-Type: text/plain; charset="UTF-8" The `perf script` command has long supported running Python and Perl scripts by embedding `libpython` and `libperl`. This approach has several drawbacks: - overhead by creating Python dictionaries for every event (whether used or not), - complex build dependencies on specific Python/Perl versions, - complications with threading due to perf being the interpreter, - no clear way to run standalone scripts like `ilist.py`. This series takes a different approach with some initial implementation posted as an RFC last October: https://lore.kernel.org/linux-perf-users/20251029053413.355154-1-irogers@google.com/ with the motivation coming up on the mailing list earlier: https://lore.kernel.org/lkml/CAP-5=fWDqE8SYfOLZkg_0=4Ayx6E7O+h7uUp4NDeCFkiN4b7-w@mail.gmail.com/ The changes remove the embedded `libpython` and `libperl` support from `perf` entirely. Instead, they expand the existing `perf` Python module to provide full access to perf data files and events, allowing scripts to be run as standalone Python applications. To demonstrate the benefits, we ported all existing Python and Perl scripts to use the new Python session API. The performance improvement is dramatic. For example, porting `mem-phys-addr.py`: Before (using embedded libpython in `perf script`): ``` $ perf mem record -a sleep 1 $ time perf script tools/perf/scripts/python/mem-phys-addr.py Event: cpu_core/mem-loads-aux/ Memory type count percentage --------------------------------------- ---------- ---------- 0-fff : Reserved 3217 100.0 real 0m3.754s user 0m0.023s sys 0m0.018s ``` After (using standalone Python script with `perf` module): ``` $ PYTHONPATH=/tmp/perf/python time python3 tools/perf/python/mem-phys-addr.py Event: evsel(cpu_core/mem-loads-aux/) Memory type count percentage --------------------------------------- ---------- ---------- 0-fff : Reserved 3217 100.0 real 0m0.106s user 0m0.021s sys 0m0.020s ``` This is a roughly 35x speedup! The change is large (11285 insertions, 15963 deletions - net 4678 deletions) due to porting all existing perl and python code to the new API. Gemini was used to achieve this and to improve the code quality. Removing support may be controversial, however, the first 52 patches are additive and merging those would allow us to focus on the remaining 6 patches that finalize the new `perf script` behavior. ** v2 Changes Focus on addressing Sashiko, leak sanitizer and runtime issues. *** 1. String Match and Event Name Accuracy * Replaced loose substring event matching across the script suite with exact matches or specific prefix constraints (`syscalls:sys_exit_`, `evsel(skb:kfree_skb)`, etc.). * Added `getattr()` safety checks to prevent script failures caused by unresolved attributes from older kernel traces. *** 2. OOM and Memory Protections * Refactored `netdev-times.py` to compute and process network statistics chronologically on-the-fly, eliminating an unbounded in-memory list that caused Out-Of-Memory crashes on large files. * Implemented threshold limits on `intel-pt-events.py` to cap memory allocation during event interleaving. * Optimized `export-to-sqlite.py` to periodically commit database transactions (every 10,000 samples) to reduce temporary SQLite journal sizes. *** 3. Portability & Environment Independence * Re-keyed internal tracking dictionaries in scripts like `powerpc-hcalls.py` to use thread `PIDs` instead of `CPUs`, ensuring correctness when threads migrate. * Switched `net_dropmonitor.py` from host-specific `/proc/kallsyms` parsing to `perf`'s built-in symbol resolution API. * Added the `--iomem` parameter to `mem-phys-addr.py` to support offline analysis of data collected on different architectures. *** 4. Standalone Scripting Improvements * Patched `builtin-script.c` to ensure `--input` parameters are successfully passed down to standalone execution pipelines via `execvp()`. * Guarded against string buffer overflows during `.py` extension path resolving. *** 5. Code Cleanups * Removed stale `perl` subdirectories from being detected by the TUI script browser. * Ran the entire script suite through `mypy` and `pylint` to achieve strict static type checking and resolve unreferenced variables. Ian Rogers (58): perf inject: Fix itrace branch stack synthesis perf arch arm: Sort includes and add missed explicit dependencies perf arch x86: Sort includes and add missed explicit dependencies perf tests: Sort includes and add missed explicit dependencies perf script: Sort includes and add missed explicit dependencies perf util: Sort includes and add missed explicit dependencies perf python: Add missed explicit dependencies perf evsel/evlist: Avoid unnecessary #includes perf data: Add open flag perf evlist: Add reference count perf evsel: Add reference count perf evlist: Add reference count checking perf python: Use evsel in sample in pyrf_event perf python: Add wrapper for perf_data file abstraction perf python: Add python session abstraction wrapping perf's session perf python: Add syscall name/id to convert syscall number and name perf python: Refactor and add accessors to sample event perf python: Add callchain support perf python: Add config file access perf python: Extend API for stat events in python.c perf python: Expose brstack in sample event perf python: Add perf.pyi stubs file perf python: Add LiveSession helper perf python: Move exported-sql-viewer.py and parallel-perf.py to tools/perf/python/ perf stat-cpi: Port stat-cpi to use python module perf mem-phys-addr: Port mem-phys-addr to use python module perf syscall-counts: Port syscall-counts to use python module perf syscall-counts-by-pid: Port syscall-counts-by-pid to use python module perf futex-contention: Port futex-contention to use python module perf flamegraph: Port flamegraph to use python module perf gecko: Port gecko to use python module perf arm-cs-trace-disasm: Port arm-cs-trace-disasm to use python module perf check-perf-trace: Port check-perf-trace to use python module perf compaction-times: Port compaction-times to use python module perf event_analyzing_sample: Port event_analyzing_sample to use python module perf export-to-sqlite: Port export-to-sqlite to use python module perf export-to-postgresql: Port export-to-postgresql to use python module perf failed-syscalls-by-pid: Port failed-syscalls-by-pid to use python module perf intel-pt-events: Port intel-pt-events/libxed to use python module perf net_dropmonitor: Port net_dropmonitor to use python module perf netdev-times: Port netdev-times to use python module perf powerpc-hcalls: Port powerpc-hcalls to use python module perf sched-migration: Port sched-migration/SchedGui to use python module perf sctop: Port sctop to use python module perf stackcollapse: Port stackcollapse to use python module perf task-analyzer: Port task-analyzer to use python module perf failed-syscalls: Port failed-syscalls to use python module perf rw-by-file: Port rw-by-file to use python module perf rw-by-pid: Port rw-by-pid to use python module perf rwtop: Port rwtop to use python module perf wakeup-latency: Port wakeup-latency to use python module perf test: Migrate Intel PT virtual LBR test to use Python API perf: Remove libperl support, legacy Perl scripts and tests perf: Remove libpython support and legacy Python scripts perf Makefile: Update Python script installation path perf script: Refactor to support standalone scripts and remove legacy features perf Documentation: Update for standalone Python scripts and remove obsolete data perf python: Improve perf script -l descriptions tools/build/Makefile.feature | 5 +- tools/build/feature/Makefile | 23 +- tools/build/feature/test-all.c | 6 +- tools/build/feature/test-libperl.c | 10 - tools/build/feature/test-libpython.c | 10 - tools/build/feature/test-python-module.c | 12 + tools/perf/Documentation/perf-check.txt | 2 - tools/perf/Documentation/perf-script-perl.txt | 216 -- .../perf/Documentation/perf-script-python.txt | 702 +----- tools/perf/Documentation/perf-script.txt | 70 +- tools/perf/Makefile.config | 37 +- tools/perf/Makefile.perf | 22 +- tools/perf/arch/arm/util/cs-etm.c | 36 +- tools/perf/arch/arm64/util/arm-spe.c | 8 +- tools/perf/arch/arm64/util/hisi-ptt.c | 2 +- tools/perf/arch/x86/tests/hybrid.c | 22 +- tools/perf/arch/x86/tests/topdown.c | 2 +- tools/perf/arch/x86/util/auxtrace.c | 2 +- tools/perf/arch/x86/util/intel-bts.c | 26 +- tools/perf/arch/x86/util/intel-pt.c | 38 +- tools/perf/arch/x86/util/iostat.c | 8 +- tools/perf/bench/evlist-open-close.c | 29 +- tools/perf/bench/inject-buildid.c | 9 +- tools/perf/builtin-annotate.c | 2 +- tools/perf/builtin-check.c | 3 +- tools/perf/builtin-ftrace.c | 14 +- tools/perf/builtin-inject.c | 81 +- tools/perf/builtin-kvm.c | 14 +- tools/perf/builtin-kwork.c | 8 +- tools/perf/builtin-lock.c | 2 +- tools/perf/builtin-record.c | 95 +- tools/perf/builtin-report.c | 6 +- tools/perf/builtin-sched.c | 26 +- tools/perf/builtin-script.c | 895 +++---- tools/perf/builtin-stat.c | 81 +- tools/perf/builtin-top.c | 104 +- tools/perf/builtin-trace.c | 60 +- tools/perf/python/SchedGui.py | 219 ++ tools/perf/python/arm-cs-trace-disasm.py | 338 +++ tools/perf/python/check-perf-trace.py | 113 + tools/perf/python/compaction-times.py | 326 +++ tools/perf/python/counting.py | 1 + tools/perf/python/event_analyzing_sample.py | 296 +++ tools/perf/python/export-to-postgresql.py | 697 ++++++ tools/perf/python/export-to-sqlite.py | 380 +++ .../python/exported-sql-viewer.py | 6 +- tools/perf/python/failed-syscalls-by-pid.py | 119 + tools/perf/python/failed-syscalls.py | 78 + tools/perf/python/flamegraph.py | 250 ++ tools/perf/python/futex-contention.py | 87 + tools/perf/python/gecko.py | 380 +++ tools/perf/python/intel-pt-events.py | 435 ++++ tools/perf/python/libxed.py | 122 + .../{scripts => }/python/mem-phys-addr.py | 66 +- tools/perf/python/net_dropmonitor.py | 58 + tools/perf/python/netdev-times.py | 472 ++++ .../{scripts => }/python/parallel-perf.py | 0 tools/perf/python/perf.pyi | 579 +++++ tools/perf/python/perf_live.py | 48 + tools/perf/python/powerpc-hcalls.py | 211 ++ tools/perf/python/rw-by-file.py | 103 + tools/perf/python/rw-by-pid.py | 158 ++ tools/perf/python/rwtop.py | 219 ++ tools/perf/python/sched-migration.py | 469 ++++ tools/perf/python/sctop.py | 174 ++ tools/perf/python/stackcollapse.py | 126 + tools/perf/python/stat-cpi.py | 151 ++ tools/perf/python/syscall-counts-by-pid.py | 88 + tools/perf/python/syscall-counts.py | 72 + tools/perf/python/task-analyzer.py | 546 ++++ tools/perf/python/tracepoint.py | 1 + tools/perf/python/twatch.py | 1 + tools/perf/python/wakeup-latency.py | 88 + tools/perf/scripts/Build | 4 - tools/perf/scripts/perl/Perf-Trace-Util/Build | 9 - .../scripts/perl/Perf-Trace-Util/Context.c | 122 - .../scripts/perl/Perf-Trace-Util/Context.xs | 42 - .../scripts/perl/Perf-Trace-Util/Makefile.PL | 18 - .../perf/scripts/perl/Perf-Trace-Util/README | 59 - .../Perf-Trace-Util/lib/Perf/Trace/Context.pm | 55 - .../Perf-Trace-Util/lib/Perf/Trace/Core.pm | 192 -- .../Perf-Trace-Util/lib/Perf/Trace/Util.pm | 94 - .../perf/scripts/perl/Perf-Trace-Util/typemap | 1 - .../scripts/perl/bin/check-perf-trace-record | 2 - .../scripts/perl/bin/failed-syscalls-record | 3 - .../scripts/perl/bin/failed-syscalls-report | 10 - tools/perf/scripts/perl/bin/rw-by-file-record | 3 - tools/perf/scripts/perl/bin/rw-by-file-report | 10 - tools/perf/scripts/perl/bin/rw-by-pid-record | 2 - tools/perf/scripts/perl/bin/rw-by-pid-report | 3 - tools/perf/scripts/perl/bin/rwtop-record | 2 - tools/perf/scripts/perl/bin/rwtop-report | 20 - .../scripts/perl/bin/wakeup-latency-record | 6 - .../scripts/perl/bin/wakeup-latency-report | 3 - tools/perf/scripts/perl/check-perf-trace.pl | 106 - tools/perf/scripts/perl/failed-syscalls.pl | 47 - tools/perf/scripts/perl/rw-by-file.pl | 106 - tools/perf/scripts/perl/rw-by-pid.pl | 184 -- tools/perf/scripts/perl/rwtop.pl | 203 -- tools/perf/scripts/perl/wakeup-latency.pl | 107 - .../perf/scripts/python/Perf-Trace-Util/Build | 4 - .../scripts/python/Perf-Trace-Util/Context.c | 225 -- .../Perf-Trace-Util/lib/Perf/Trace/Core.py | 116 - .../lib/Perf/Trace/EventClass.py | 97 - .../lib/Perf/Trace/SchedGui.py | 184 -- .../Perf-Trace-Util/lib/Perf/Trace/Util.py | 92 - .../scripts/python/arm-cs-trace-disasm.py | 355 --- .../python/bin/compaction-times-record | 2 - .../python/bin/compaction-times-report | 4 - .../python/bin/event_analyzing_sample-record | 8 - .../python/bin/event_analyzing_sample-report | 3 - .../python/bin/export-to-postgresql-record | 8 - .../python/bin/export-to-postgresql-report | 29 - .../python/bin/export-to-sqlite-record | 8 - .../python/bin/export-to-sqlite-report | 29 - .../python/bin/failed-syscalls-by-pid-record | 3 - .../python/bin/failed-syscalls-by-pid-report | 10 - .../perf/scripts/python/bin/flamegraph-record | 2 - .../perf/scripts/python/bin/flamegraph-report | 3 - .../python/bin/futex-contention-record | 2 - .../python/bin/futex-contention-report | 4 - tools/perf/scripts/python/bin/gecko-record | 2 - tools/perf/scripts/python/bin/gecko-report | 7 - .../scripts/python/bin/intel-pt-events-record | 13 - .../scripts/python/bin/intel-pt-events-report | 3 - .../scripts/python/bin/mem-phys-addr-record | 19 - .../scripts/python/bin/mem-phys-addr-report | 3 - .../scripts/python/bin/net_dropmonitor-record | 2 - .../scripts/python/bin/net_dropmonitor-report | 4 - .../scripts/python/bin/netdev-times-record | 8 - .../scripts/python/bin/netdev-times-report | 5 - .../scripts/python/bin/powerpc-hcalls-record | 2 - .../scripts/python/bin/powerpc-hcalls-report | 2 - .../scripts/python/bin/sched-migration-record | 2 - .../scripts/python/bin/sched-migration-report | 3 - tools/perf/scripts/python/bin/sctop-record | 3 - tools/perf/scripts/python/bin/sctop-report | 24 - .../scripts/python/bin/stackcollapse-record | 8 - .../scripts/python/bin/stackcollapse-report | 3 - .../python/bin/syscall-counts-by-pid-record | 3 - .../python/bin/syscall-counts-by-pid-report | 10 - .../scripts/python/bin/syscall-counts-record | 3 - .../scripts/python/bin/syscall-counts-report | 10 - .../scripts/python/bin/task-analyzer-record | 2 - .../scripts/python/bin/task-analyzer-report | 3 - tools/perf/scripts/python/check-perf-trace.py | 84 - tools/perf/scripts/python/compaction-times.py | 311 --- .../scripts/python/event_analyzing_sample.py | 192 -- .../scripts/python/export-to-postgresql.py | 1114 --------- tools/perf/scripts/python/export-to-sqlite.py | 799 ------ .../scripts/python/failed-syscalls-by-pid.py | 79 - tools/perf/scripts/python/flamegraph.py | 267 -- tools/perf/scripts/python/futex-contention.py | 57 - tools/perf/scripts/python/gecko.py | 395 --- tools/perf/scripts/python/intel-pt-events.py | 494 ---- tools/perf/scripts/python/libxed.py | 107 - tools/perf/scripts/python/net_dropmonitor.py | 78 - tools/perf/scripts/python/netdev-times.py | 473 ---- tools/perf/scripts/python/powerpc-hcalls.py | 202 -- tools/perf/scripts/python/sched-migration.py | 462 ---- tools/perf/scripts/python/sctop.py | 89 - tools/perf/scripts/python/stackcollapse.py | 127 - tools/perf/scripts/python/stat-cpi.py | 79 - .../scripts/python/syscall-counts-by-pid.py | 75 - tools/perf/scripts/python/syscall-counts.py | 65 - tools/perf/scripts/python/task-analyzer.py | 934 ------- tools/perf/tests/backward-ring-buffer.c | 26 +- tools/perf/tests/code-reading.c | 14 +- tools/perf/tests/dlfilter-test.c | 8 +- tools/perf/tests/event-times.c | 6 +- tools/perf/tests/event_update.c | 4 +- tools/perf/tests/evsel-roundtrip-name.c | 8 +- tools/perf/tests/evsel-tp-sched.c | 4 +- tools/perf/tests/expand-cgroup.c | 12 +- tools/perf/tests/hists_cumulate.c | 2 +- tools/perf/tests/hists_filter.c | 2 +- tools/perf/tests/hists_link.c | 2 +- tools/perf/tests/hists_output.c | 2 +- tools/perf/tests/hwmon_pmu.c | 21 +- tools/perf/tests/keep-tracking.c | 10 +- tools/perf/tests/make | 9 +- tools/perf/tests/mmap-basic.c | 42 +- tools/perf/tests/openat-syscall-all-cpus.c | 6 +- tools/perf/tests/openat-syscall-tp-fields.c | 26 +- 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