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In test_intel_pt_events_python.sh, test_export_to_sqlite_python.sh, and
test_export_to_postgresql_python.sh, 'sh -c "uname; true"' uses the
shell builtin 'true' and exits within microseconds of 'uname', sending
SIGCHLD to 'perf record' before the Intel PT AUX buffer is always
flushed under heavy parallel load (~5-10% drop rate).
Sleep 0.05s in the subshell after 'uname' ('sh -c "uname; sleep 0.05"')
so 'uname' completely exits and flushes its AUX trace before 'sh' exits,
and wrap the record and verification step in a bounded retry loop (up to
5 attempts). Also pass '-B -N --no-bpf-event' to 'perf record -g' in
test_export_to_sqlite_python.sh and test_export_to_postgresql_python.sh
to avoid build-id cache and BPF synthesis overhead.
Fixes: d4ce72e9e238fd70 ("perf python: Port intel-pt-events and libxed to perf module")
Fixes: 62d350135e676a11 ("perf python: Port export-to-sqlite to perf module")
Fixes: b1f968c9656a8a87 ("perf python: Port export-to-postgresql to perf module")
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Refactor 'perf script' to launch standalone scripts directly via fork()
and execvp() and remove the legacy embedded Perl and Python scripting
engines:
- Remove the embedded Perl scripting engine
(util/scripting-engines/trace-event-perl.c), Perl scripts, bin
wrappers, and Trace-Util library
(scripts/perl/Perf-Trace-Util/), and script_perl.sh test.
- Remove libperl feature checks from Makefile.config, Makefile.perf,
builtin-check.c, and Documentation/perf-check.txt.
- Remove -g / --gen-script option and scripting_ops dispatch table from
builtin-script.c and trace-event-scripting.c.
- Hide the legacy -s / --script option and update script discovery in
find_script() and list_available_scripts() to prioritize the system
'python' directory over bare filenames in the current directory.
- Update the Python script shell tests (test_arm_coresight_disasm.sh,
test_task_analyzer.sh, and test_*_python.sh) to invoke scripts via
'perf script <script>' rather than running the Python interpreter
directly on the script file path.
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Port intel-pt-events.py and libxed.py from tools/perf/scripts/python/
to standalone modules in tools/perf/python/:
- Refactor intel-pt-events.py into an IntelPTAnalyzer class with full
type annotations to encapsulate trace state and stashed output.
- Configure instruction trace decoding directly via perf.session's
itrace option and context_switch callback.
- Dynamically select 32-bit vs 64-bit disassembly mode in libxed.py
using session.is_64_bit and annotate instructions with source lines
via sample.srccode().
- Rename methods in libxed.py to snake_case (instruction, set_mode,
disassemble_one) and remove Python 2 compatibility code.
Add a shell test (test_intel_pt_events_python.sh) to verify the
standalone script.
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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