From: Ian Rogers <irogers@google.com>
To: irogers@google.com, acme@kernel.org, adrian.hunter@intel.com,
alice.mei.rogers@gmail.com, james.clark@linaro.org,
linux-perf-users@vger.kernel.org, namhyung@kernel.org
Cc: dapeng1.mi@linux.intel.com, leo.yan@linux.dev,
linux-kernel@vger.kernel.org, mingo@redhat.com,
peterz@infradead.org, tmricht@linux.ibm.com
Subject: [PATCH v1 06/49] perf python: Clean up pylint warnings in twatch.py
Date: Sat, 19 Sep 2026 22:20:58 -0700 [thread overview]
Message-ID: <04eae243b929ccafe1ed8d679c426dbd7bc40098.1789880842.git.irogers@google.com> (raw)
In-Reply-To: <cover.1789880842.git.irogers@google.com>
Clean up pylint warnings in twatch.py so that it passes pylint without
warning suppression comments:
- Convert tab indentation to 4 spaces (W0311: bad-indentation).
- Remove unnecessary trailing semicolon (W0301: unnecessary-semicolon)
after evsel.open().
- Convert floating multi-line string comments to '#' comments (W0105:
pointless-string-statement).
Assisted-by: Antigravity:gemini-3.1-pro
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/python/twatch.py | 80 ++++++++++++++++++-------------------
1 file changed, 39 insertions(+), 41 deletions(-)
diff --git a/tools/perf/python/twatch.py b/tools/perf/python/twatch.py
index 04f3db29b9bc..ad35b1620781 100755
--- a/tools/perf/python/twatch.py
+++ b/tools/perf/python/twatch.py
@@ -9,53 +9,51 @@
import perf
def main(context_switch = 0, thread = -1):
- cpus = perf.cpu_map()
- threads = perf.thread_map(thread)
- evsel = perf.evsel(type = perf.TYPE_SOFTWARE,
- config = perf.COUNT_SW_DUMMY,
- task = 1, comm = 1, mmap = 0, freq = 0,
- wakeup_events = 1, watermark = 1,
- sample_id_all = 1, context_switch = context_switch,
- sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU)
-
- """What we want are just the PERF_RECORD_ lifetime events for threads,
- using the default, PERF_TYPE_HARDWARE + PERF_COUNT_HW_CYCLES & freq=1
- (the default), makes perf reenable irq_vectors:local_timer_entry, when
- disabling nohz, not good for some use cases where all we want is to get
- threads comes and goes... So use (perf.TYPE_SOFTWARE, perf_COUNT_SW_DUMMY,
- freq=0) instead."""
-
- evsel.open(cpus = cpus, threads = threads);
- evlist = perf.evlist(cpus, threads)
- evlist.add(evsel)
- evlist.mmap()
- while True:
- evlist.poll(timeout = -1)
- for cpu in cpus:
- event = evlist.read_on_cpu(cpu)
- if not event:
- continue
- print("cpu: {0}, pid: {1}, tid: {2} {3}".format(event.sample_cpu,
+ cpus = perf.cpu_map()
+ threads = perf.thread_map(thread)
+ evsel = perf.evsel(type = perf.TYPE_SOFTWARE,
+ config = perf.COUNT_SW_DUMMY,
+ task = 1, comm = 1, mmap = 0, freq = 0,
+ wakeup_events = 1, watermark = 1,
+ sample_id_all = 1, context_switch = context_switch,
+ sample_type = perf.SAMPLE_PERIOD | perf.SAMPLE_TID | perf.SAMPLE_CPU)
+
+ # What we want are just the PERF_RECORD_ lifetime events for threads,
+ # using the default, PERF_TYPE_HARDWARE + PERF_COUNT_HW_CYCLES & freq=1
+ # (the default), makes perf reenable irq_vectors:local_timer_entry, when
+ # disabling nohz, not good for some use cases where all we want is to get
+ # threads comes and goes... So use (perf.TYPE_SOFTWARE, perf_COUNT_SW_DUMMY,
+ # freq=0) instead.
+
+ evsel.open(cpus = cpus, threads = threads)
+ evlist = perf.evlist(cpus, threads)
+ evlist.add(evsel)
+ evlist.mmap()
+ while True:
+ evlist.poll(timeout = -1)
+ for cpu in cpus:
+ event = evlist.read_on_cpu(cpu)
+ if not event:
+ continue
+ print("cpu: {0}, pid: {1}, tid: {2} {3}".format(event.sample_cpu,
event.sample_pid,
event.sample_tid,
event))
if __name__ == '__main__':
- """
- To test the PERF_RECORD_SWITCH record, pick a pid and replace
- in the following line.
+ # To test the PERF_RECORD_SWITCH record, pick a pid and replace
+ # in the following line.
- Example output:
+ # Example output:
-cpu: 3, pid: 31463, tid: 31593 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31593, switch_out: 1 }
-cpu: 1, pid: 31463, tid: 31489 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31489, switch_out: 1 }
-cpu: 2, pid: 31463, tid: 31496 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31496, switch_out: 1 }
-cpu: 3, pid: 31463, tid: 31491 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31491, switch_out: 0 }
+ # cpu: 3, pid: 31463, tid: 31593 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31593, switch_out: 1 }
+ # cpu: 1, pid: 31463, tid: 31489 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31489, switch_out: 1 }
+ # cpu: 2, pid: 31463, tid: 31496 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31496, switch_out: 1 }
+ # cpu: 3, pid: 31463, tid: 31491 { type: context_switch, next_prev_pid: 31463, next_prev_tid: 31491, switch_out: 0 }
+ #
+ # It is possible as well to use event.misc & perf.PERF_RECORD_MISC_SWITCH_OUT
+ # to figure out if this is a context switch in or out of the monitored threads.
- It is possible as well to use event.misc & perf.PERF_RECORD_MISC_SWITCH_OUT
- to figure out if this is a context switch in or out of the monitored threads.
-
- If bored, please add command line option parsing support for these options :-)
- """
- # main(context_switch = 1, thread = 31463)
+ # If bored, please add command line option parsing support for these options :-)
+ # # main(context_switch = 1, thread = 31463)
main()
--
2.55.0.1082.g2b9226bbc0-goog
next prev parent reply other threads:[~2026-09-20 5:22 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-20 5:20 [PATCH v1 00/49] perf: Complete transition to standalone Python scripts Ian Rogers
2026-09-20 5:20 ` [PATCH v1 01/49] perf python: Update syscall format string to optional positional Ian Rogers
2026-09-20 5:20 ` [PATCH v1 02/49] perf python: Update callchain stubs and session thread lookup Ian Rogers
2026-09-20 5:20 ` [PATCH v1 03/49] perf python: Clean up pylint warnings in ilist.py Ian Rogers
2026-09-20 5:20 ` [PATCH v1 04/49] perf python: Clean up pylint warnings in treport.py Ian Rogers
2026-09-20 5:20 ` [PATCH v1 05/49] perf python: Clean up pylint warnings in tracepoint.py Ian Rogers
2026-09-20 5:20 ` Ian Rogers [this message]
2026-09-20 5:20 ` [PATCH v1 07/49] perf python: Improve perf script -l descriptions Ian Rogers
2026-09-20 5:21 ` [PATCH v1 08/49] perf python: Expose addr location, transaction, and context_switch Ian Rogers
2026-09-20 5:21 ` [PATCH v1 09/49] perf python: Add Intel PT call_return and itrace capability Ian Rogers
2026-09-20 5:21 ` [PATCH v1 10/49] perf python: Allow KeyboardInterrupt to propagate in LiveSession Ian Rogers
2026-09-20 5:21 ` [PATCH v1 11/49] perf pmu-events: Clean up mypy and pylint issues Ian Rogers
2026-09-20 5:21 ` [PATCH v1 12/49] perf test: Clean up mypy and pylint issues in shell test libraries Ian Rogers
2026-09-20 5:21 ` [PATCH v1 13/49] perf build: Make mypy build test opt-out (NO_MYPY=1) Ian Rogers
2026-09-20 5:21 ` [PATCH v1 14/49] perf build: Make pylint build test opt-out (NO_PYLINT=1) Ian Rogers
2026-09-20 5:21 ` [PATCH v1 15/49] perf Makefile: Install standalone Python scripts during transition Ian Rogers
2026-09-20 5:21 ` [PATCH v1 16/49] perf python: Port stat-cpi to perf module Ian Rogers
2026-09-20 5:21 ` [PATCH v1 17/49] perf python: Port mem-phys-addr " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 18/49] perf python: Port stackcollapse " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 19/49] perf python: Port flamegraph " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 20/49] perf python: Port gecko " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 21/49] perf python: Port event_analyzing_sample " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 22/49] perf python: Port syscall-counts " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 23/49] perf python: Port syscall-counts-by-pid " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 24/49] perf python: Port failed-syscalls-by-pid " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 25/49] perf python: Port failed-syscalls from Perl " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 26/49] perf python: Port sctop " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 27/49] perf python: Port rw-by-file from Perl " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 28/49] perf python: Port rw-by-pid " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 29/49] perf python: Port rwtop " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 30/49] perf python: Port futex-contention " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 31/49] perf python: Port task-analyzer " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 32/49] perf python: Port sched-migration and SchedGui " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 33/49] perf python: Port wakeup-latency from Perl " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 34/49] perf python: Port compaction-times " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 35/49] perf python: Port net_dropmonitor " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 36/49] perf python: Port netdev-times " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 37/49] perf python: Port check-perf-trace " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 38/49] perf python: Port arm-cs-trace-disasm " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 39/49] perf python: Port powerpc-hcalls " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 40/49] perf python: Port intel-pt-events and libxed " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 41/49] perf test: Migrate Intel PT virtual LBR test to Python API Ian Rogers
2026-09-20 5:21 ` [PATCH v1 42/49] perf python: Port export-to-sqlite to perf module Ian Rogers
2026-09-20 5:21 ` [PATCH v1 43/49] perf python: Port export-to-postgresql " Ian Rogers
2026-09-20 5:21 ` [PATCH v1 44/49] perf python: Move and clean up exported-sql-viewer.py Ian Rogers
2026-09-20 5:21 ` [PATCH v1 45/49] perf python: Move and clean up parallel-perf.py Ian Rogers
2026-09-20 5:21 ` [PATCH v1 46/49] perf: Remove libpython support and legacy Python scripts Ian Rogers
2026-09-20 5:21 ` [PATCH v1 47/49] perf Makefile: Update Python script installation path Ian Rogers
2026-09-20 5:21 ` [PATCH v1 48/49] perf script: Support standalone scripts and remove embedded scripting Ian Rogers
2026-09-20 5:21 ` [PATCH v1 49/49] perf Documentation: Update for standalone Python scripts Ian Rogers
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