čt 21. 8. 2025 v 5:58 odesílatel Crystal Wood <crw...@redhat.com> napsal: > diff --git a/Documentation/tools/rtla/common_osnoise_options.rst > b/Documentation/tools/rtla/common_osnoise_options.rst > index d73de2d58f5f..ba8e6674c220 100644 > --- a/Documentation/tools/rtla/common_osnoise_options.rst > +++ b/Documentation/tools/rtla/common_osnoise_options.rst > @@ -1,3 +1,11 @@ > +.. |threshold| replace:: **-a/--auto**, **-s/--stop**, or > **-S/--stop-total** > +.. |thresharg| replace:: -s > +.. |tracer| replace:: osnoise > + > +.. |actionsperf| replace:: > + For time-sensitive actions, it is recommended to run **rtla** with > + RT priority. > +
Unfortunately, real-time priority won't really help you in practice for overflow-to-action latency, since the detection whether tracing was stopped is only done once per second, when pulling the data. The message should be instead just (something like): "Due to implementational limitations,actions might be delayed up to one second after tracing is stopped." until either a trace event is implemented for stop tracing threshold overflow (proposed in [1]), or rtla-osnoise is moved to BPF sample collection, too. [1] https://lore.kernel.org/linux-trace-kernel/CAP4=nvqwcwaoefhaqa82-vdb-00_y1-0fpopbeyetj2q1ew...@mail.gmail.com/ > --- a/tools/tracing/rtla/tests/osnoise.t > +++ b/tools/tracing/rtla/tests/osnoise.t > @@ -8,7 +8,8 @@ set_timeout 2m > check "verify help page" \ > "osnoise --help" 0 "osnoise version" > check "verify the --priority/-P param" \ > - "osnoise top -P F:1 -c 0 -r 900000 -d 10s -q" > + "osnoise top -P F:1 -c 0 -r 900000 -d 10s -q -S 1 --on-threshold > shell,command=\"tests/scripts/check-priority.sh osnoise/ SCHED_FIFO 1\"" \ > + 2 "Priorities are set correctly" > check "verify the --stop/-s param" \ > "osnoise top -s 30 -T 1" 2 "rtla hit stop tracing" > check "verify the --trace param" \ > @@ -22,4 +23,28 @@ check "verify the --entries/-E param" \ > check_with_osnoise_options "apply default period" \ > "osnoise hist -s 1" 2 period_us=600000000 > This is useful to have also for rtla-osnoise, thank you! Tomas
