linux-next.git/tools/perf/scripts/python, branch master

perf: Remove libpython support and legacy Python scripts

2026-09-26T18:54:54+00:00

Remove embedded Python interpreter support (libpython) from perf, as all Python scripts have been migrated to standalone scripts using the perf Python extension module. Changes include: - Remove libpython detection and build flags from Makefile.config. - Remove legacy Python script installation rules from Makefile.perf. - Delete tools/perf/util/scripting-engines/trace-event-python.c and tools/perf/scripts/python/Perf-Trace-Util/Context.c. - Remove Python scripting engine registration from trace-event-scripting.c. - Remove libpython from the supported features list in builtin-check.c and Documentation/perf-check.txt. - Delete the legacy Python scripts and bin wrappers in tools/perf/scripts/python/ and update shell tests. Assisted-by: Antigravity:gemini-3.1-pro Signed-off-by: Ian Rogers Signed-off-by: Arnaldo Carvalho de Melo

perf python: Move and clean up parallel-perf.py

2026-09-26T18:49:31+00:00

Move parallel-perf.py from tools/perf/scripts/python/ to tools/perf/python/ as it is a standalone Python utility that invokes 'perf script' in parallel across time slices and CPUs. Update tools/perf/tests/shell/script.sh accordingly. Also fix bugs and clean up the script to pass mypy and pylint without suppression comments: - Fix Work.command() to return the shlex.quote()-escaped command string (previously sh_cmd was computed with shlex.quote() and discarded in favor of unquoted self.cmd). - Close self.popen.stdout in the parent process after spawning the consumer subprocess in Work.start() when --pipe-to is used, ensuring the producer receives SIGPIPE if the consumer exits early and avoiding leaking the pipe file descriptor. - Convert method and function names to snake_case, specify utf-8 file encodings, and add type annotations and docstrings. Assisted-by: Antigravity:gemini-3.1-pro Signed-off-by: Ian Rogers Signed-off-by: Arnaldo Carvalho de Melo

perf python: Move and clean up exported-sql-viewer.py

2026-09-26T18:49:31+00:00

Move exported-sql-viewer.py from tools/perf/scripts/python/ to tools/perf/python/ as it is a standalone PySide/PyQt GUI application for viewing SQLite and PostgreSQL databases exported by perf script. Improvements and cleanups compared to the legacy script: - Add support for PySide6 (falling back to PySide2 and PySide) loaded dynamically via importlib, and provide stub base classes (_QtBase, _QtWidget) so static analysis (mypy and pylint) and --help-only execution succeed when Qt bindings are not installed. - Fix a Python 3 NameError crash in HBoxLayout where expanded_mark and not_expanded_mark called Python 2's removed unicode() builtin instead of chr(0x25BC) and chr(0x25B6). - Replace instance-level method monkey-patching (self.mousePressEvent = self.MousePressEvent) on SwitchGraphView with proper class methods gated by self.rb_enabled so Qt virtual method dispatch works cleanly across PySide2 and PySide6. - Remove Python 2 constructs (cPickle, xrange), wildcard imports, bare 'except:' clauses, and variable names shadowing Python builtins. Assisted-by: Antigravity:gemini-3.1-pro Signed-off-by: Ian Rogers Signed-off-by: Arnaldo Carvalho de Melo

perf cs-etm: Filter synthesized branch samples

2026-07-03T23:51:59+00:00

The itrace 'c' and 'r' options request synthesized branch events for calls and returns only. For perf script the default itrace options are "--itrace=ce", so CS ETM should emit call branches and error events by default. CS ETM currently synthesizes a branch sample for every decoded taken branch whenever branch synthesis is enabled. This produces redundant jump and conditional branch samples. Add a branch filter derived from the itrace calls and returns options. When neither option is set, keep the existing behavior and synthesize all branch samples. When calls or returns are requested, emit only branch samples whose flags match the selected branch type, while preserving trace begin/end markers. Also update test_arm_coresight_disasm.sh and arm-cs-trace-disasm.py to use the --itrace=b option for generating branch samples. Before: perf script -F,+flags callchain_test 6114 [005] 331519.825214: 1 branches: tr strt jmp 0 [unknown] ([unknown]) => ffff8000803a3a68 perf_report_aux_output_id+0x50 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: call ffff8000803a3a74 perf_report_aux_output_id+0x5c ([kernel.kallsyms]) => ffff8000817f4d88 memset+0x0 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jmp ffff8000817f4d8c memset+0x4 ([kernel.kallsyms]) => ffff8000817f4c00 __pi_memset_generic+0x0 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jcc ffff8000817f4c1c __pi_memset_generic+0x1c ([kernel.kallsyms]) => ffff8000817f4c44 __pi_memset_generic+0x44 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jcc ffff8000817f4c4c __pi_memset_generic+0x4c ([kernel.kallsyms]) => ffff8000817f4c5c __pi_memset_generic+0x5c ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jcc ffff8000817f4c5c __pi_memset_generic+0x5c ([kernel.kallsyms]) => ffff8000817f4cf0 __pi_memset_generic+0xf0 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jcc ffff8000817f4d30 __pi_memset_generic+0x130 ([kernel.kallsyms]) => ffff8000817f4d68 __pi_memset_generic+0x168 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jcc ffff8000817f4d78 __pi_memset_generic+0x178 ([kernel.kallsyms]) => ffff8000817f4d6c __pi_memset_generic+0x16c ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jcc ffff8000817f4d78 __pi_memset_generic+0x178 ([kernel.kallsyms]) => ffff8000817f4d6c __pi_memset_generic+0x16c ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jcc ffff8000817f4d78 __pi_memset_generic+0x178 ([kernel.kallsyms]) => ffff8000817f4d6c __pi_memset_generic+0x16c ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: return ffff8000817f4d84 __pi_memset_generic+0x184 ([kernel.kallsyms]) => ffff8000803a3a78 perf_report_aux_output_id+0x60 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: jcc ffff8000803a3a98 perf_report_aux_output_id+0x80 ([kernel.kallsyms]) => ffff8000803a3b04 perf_report_aux_output_id+0xec ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: call ffff8000803a3b1c perf_report_aux_output_id+0x104 ([kernel.kallsyms]) => ffff8000803a38f8 __perf_event_header__init_id+0x0 ([kernel.kallsyms]) After: callchain_test 6114 [005] 331519.825214: 1 branches: tr strt jmp 0 [unknown] ([unknown]) => ffff8000803a3a68 perf_report_aux_output_id+0x50 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: call ffff8000803a3a74 perf_report_aux_output_id+0x5c ([kernel.kallsyms]) => ffff8000817f4d88 memset+0x0 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: call ffff8000803a3b1c perf_report_aux_output_id+0x104 ([kernel.kallsyms]) => ffff8000803a38f8 __perf_event_header__init_id+0x0 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: call ffff8000803a39c0 __perf_event_header__init_id+0xc8 ([kernel.kallsyms]) => ffff800080105258 __task_pid_nr_ns+0x0 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: call ffff80008010528c __task_pid_nr_ns+0x34 ([kernel.kallsyms]) => ffff8000801d5610 __rcu_read_lock+0x0 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: call ffff8000801052b0 __task_pid_nr_ns+0x58 ([kernel.kallsyms]) => ffff800080192078 lock_acquire+0x0 ([kernel.kallsyms]) callchain_test 6114 [005] 331519.825214: 1 branches: call ffff8000801923f4 lock_acquire+0x37c ([kernel.kallsyms]) => ffff8000801d6da0 rcu_is_watching+0x0 ([kernel.kallsyms]) Fixes: b12235b113cf ("perf tools: Add mechanic to synthesise CoreSight trace packets") Signed-off-by: Leo Yan Reviewed-by: James Clark Signed-off-by: Leo Yan Signed-off-by: Namhyung Kim

perf scripts: Add configurable sorting option to powerpc-hcalls

2026-06-30T17:24:21+00:00

The powerpc-hcalls.py script currently prints hypercall statistics in a fixed sort order based on the number of hcall occurrences, making it difficult to analyze hcalls from different execution characteristics. Add support for runtime-configurable sorting so users can order hypercall statistics by count, minimum latency, maximum latency, or average latency using a --sort option. Parse arguments through sys.argv to support perf script argument passing semantics. Example: perf record -a -e powerpc* sleep 10 perf script -s ./powerpc-hcalls.py -i ./perf.data -- --sort=max SORT KEY = max hcall count min(ns) max(ns) avg(ns) H_SEND_LOGICAL_LAN 47 7380 40148 8739 H_VIO_SIGNAL 706 880 17454 1911 H_RANDOM 1 15176 15176 15176 H_PUT_TCE_INDIRECT 4 3032 10444 4956 H_ADD_LOGICAL_LAN_BUFFER 363 1250 8716 1534 H_SEND_CRQ 8 2086 6846 3044 H_PUT_TCE 9 1284 4932 2646 H_STUFF_TCE 13 1620 3962 2358 This makes it easier to identify frequently occurring or high-latency hypercalls depending on the analysis being performed. Signed-off-by: Shivani Nittor Signed-off-by: Namhyung Kim

perf script powerpc: Fix a typo in the name of H_DISABLE_AND_GET

2026-06-30T17:24:21+00:00

The name of the hcall for opcode 432 is "H_DISABLE_AND_GET". This typo was fixed in the main file [1] in the commit 0f10228c6ff6 ("KVM: PPC: Fix typo on H_DISABLE_AND_GET hcall"). [1]: arch/powerpc/include/asm/hvcall.h Signed-off-by: Gautam Menghani Signed-off-by: Namhyung Kim

perf script powerpc: Update the hcall list with new hcalls

2026-06-30T17:24:21+00:00

Update the hcall list with the newer hcalls in PPC. [1]: github.com/torvalds/linux/blob/master/arch/powerpc/include/asm/hvcall.h Signed-off-by: Gautam Menghani Reviewed-by: Shivani Nittor Signed-off-by: Namhyung Kim

perf test cs-etm: Make disassembly test use kcore

2026-06-10T21:55:49+00:00

Hits in modules return empty disassembly with vmlinux as an input to objdump. Make the disassembly test more reliable by always using kcore. And update the comments to say that this is supported by the script. Signed-off-by: James Clark Cc: Amir Ayupov Cc: Ian Rogers Cc: Jiri Olsa Cc: Jonathan Corbet Cc: Leo Yan Cc: Mike Leach Cc: Namhyung Kim Cc: Paschalis Mpeis Cc: Shuah Khan Cc: Suzuki Poulouse Signed-off-by: Arnaldo Carvalho de Melo

perf script: Fix script_fetch_insn for more than just x86

2026-01-27T04:35:22+00:00

The script_fetch_insn code was only supported on natively running x86. Implement a crude elf_machine_max_instruction_length function and use to give an instruction length on more than just x86. Use the ELF machine to determine the length to use to support cross-architecture development. Signed-off-by: Ian Rogers Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Andi Kleen Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Leo Yan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Shimin Guo Cc: Yujie Liu [ Conditionally define EM_CSKY and EM_LOONGARCH for older distros ] Signed-off-by: Arnaldo Carvalho de Melo

perf flamegraph: Fix minor pylint/type hint issues

2025-07-16T17:43:27+00:00

Switch to assuming python3. Fix minor pylint issues on line length, repeated compares, not using f-strings and variable case. Add type hints and check with mypy. Signed-off-by: Ian Rogers Tested-by: Namhyung Kim Link: https://lore.kernel.org/r/20250716004635.31161-1-irogers@google.com Signed-off-by: Namhyung Kim