Re: [PATCH v3 4/9] perf test: Deflake Intel PT Python shell tests under load

[sashiko-bot@kernel.org]

> 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: d4ce72e9e238 ("perf python: Port intel-pt-events and libxed to perf module")
> Fixes: 62d350135e67 ("perf python: Port export-to-sqlite to perf module")
> Fixes: b1f968c9656a ("perf python: Port export-to-postgresql to perf module")
> Assisted-by: Antigravity:gemini-3.1-pro
> Signed-off-by: Ian Rogers <irogers@google.com>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.dev/#/patchset/20260929065839.407062-1-irogers@google.com?part=4