linux-toradex.git/tools/perf/python/stackcollapse.py, branch master Linux kernel for Apalis and Colibri modules perf python: Port stackcollapse to perf module 2026-09-26T18:49:28+00:00 Ian Rogers irogers@google.com 2026-09-26T06:19:45+00:00 c3034e70c6d4a2883a51e852a60b2c0ffa64703d Port stackcollapse.py from tools/perf/scripts/python/ to a standalone script in tools/perf/python/ refactored into a StackCollapseAnalyzer class. Improvements compared to the legacy script: - Traverse sample.callchain directly from perf.session without allocating per-event dictionaries, and fall back to sample.symbol when a sample has no callchain. - Replace deprecated optparse with argparse, adding -i/--input alongside --include-tid, --include-pid, --no-comm, --tidy-java, and --kernel. - Handle BrokenPipeError cleanly when output is piped into downstream tools (such as head or flamegraph.pl). Add a shell test (test_stackcollapse_python.sh) using a CPU workload (perf test -w noploop) 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> 
Port stackcollapse.py from tools/perf/scripts/python/ to a standalone
script in tools/perf/python/ refactored into a StackCollapseAnalyzer
class.

Improvements compared to the legacy script:
- Traverse sample.callchain directly from perf.session without
  allocating per-event dictionaries, and fall back to sample.symbol when
  a sample has no callchain.
- Replace deprecated optparse with argparse, adding -i/--input alongside
  --include-tid, --include-pid, --no-comm, --tidy-java, and --kernel.
- Handle BrokenPipeError cleanly when output is piped into downstream
  tools (such as head or flamegraph.pl).

Add a shell test (test_stackcollapse_python.sh) using a CPU workload
(perf test -w noploop) 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>