linux/tools/perf/python
Ian Rogers 97c70711fc perf python: Port wakeup-latency from Perl to perf module
Replace the legacy Perl script wakeup-latency.pl with a standalone
Python script in tools/perf/python/wakeup-latency.py using the perf
Python module.

Improvements compared to the legacy Perl script:
- Remove the dependency on libperl and Perf::Trace::Util.
- Track wakeup timestamps per-task (keyed by the wakee PID on
  sched:sched_wakeup and matched against next_pid on sched:sched_switch)
  rather than per-CPU, avoiding mixed latencies when multiple wakeups
  occur on a CPU before a context switch.
- Guard print_totals() when total_wakeups == 0 (printing 'N/A' instead
  of dividing by zero when a trace contains no matched wakeup/switch
  pairs).
- Add argparse CLI options (-i/--input) and full type annotations.

Add a shell test
(test_wakeup_latency_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>
2026-09-26 20:49:30 +02:00
..
counting.py perf python: Improve perf script -l descriptions 2026-09-26 20:49:27 +02:00
event_analyzing_sample.py perf python: Port event_analyzing_sample to perf module 2026-09-26 20:49:29 +02:00
failed-syscalls-by-pid.py perf python: Port failed-syscalls-by-pid to perf module 2026-09-26 20:49:29 +02:00
failed-syscalls.py perf python: Port failed-syscalls from Perl to perf module 2026-09-26 20:49:29 +02:00
flamegraph.py perf python: Port flamegraph to perf module 2026-09-26 20:49:28 +02:00
futex-contention.py perf python: Port futex-contention to perf module 2026-09-26 20:49:29 +02:00
gecko.py perf python: Port gecko to perf module 2026-09-26 20:49:28 +02:00
ilist.py perf python: Clean up pylint warnings in ilist.py 2026-09-26 20:49:27 +02:00
mem-phys-addr.py perf python: Port mem-phys-addr to perf module 2026-09-26 20:49:28 +02:00
perf_live.py perf python: Allow KeyboardInterrupt to propagate in LiveSession 2026-09-26 20:49:27 +02:00
perf.pyi perf python: Add Intel PT call_return and itrace capability 2026-09-26 20:49:27 +02:00
rw-by-file.py perf python: Port rw-by-file from Perl to perf module 2026-09-26 20:49:29 +02:00
rw-by-pid.py perf python: Port rw-by-pid from Perl to perf module 2026-09-26 20:49:29 +02:00
rwtop.py perf python: Port rwtop from Perl to perf module 2026-09-26 20:49:29 +02:00
sched-migration.py perf python: Port sched-migration and SchedGui to perf module 2026-09-26 20:49:30 +02:00
SchedGui.py perf python: Port sched-migration and SchedGui to perf module 2026-09-26 20:49:30 +02:00
sctop.py perf python: Port sctop to perf module 2026-09-26 20:49:29 +02:00
stackcollapse.py perf python: Port stackcollapse to perf module 2026-09-26 20:49:28 +02:00
stat-cpi.py perf python: Port stat-cpi to perf module 2026-09-26 20:49:28 +02:00
syscall-counts-by-pid.py perf python: Port syscall-counts-by-pid to perf module 2026-09-26 20:49:29 +02:00
syscall-counts.py perf python: Port syscall-counts to perf module 2026-09-26 20:49:29 +02:00
task-analyzer.py perf python: Port task-analyzer to perf module 2026-09-26 20:49:30 +02:00
tracepoint.py perf python: Improve perf script -l descriptions 2026-09-26 20:49:27 +02:00
treport.py perf python: Clean up pylint warnings in treport.py 2026-09-26 20:49:27 +02:00
twatch.py perf python: Improve perf script -l descriptions 2026-09-26 20:49:27 +02:00
wakeup-latency.py perf python: Port wakeup-latency from Perl to perf module 2026-09-26 20:49:30 +02:00