Re: [PATCH v2 4/4] rv/rtapp: Add wakeup monitor

[Nam Cao <namcao@linutronix.de>]

Gabriele Monaco <gmonaco@redhat.com> writes:
> This looks good, but if I understand it correctly, the same violation should be
> spotted by both monitors from two different perspectives, but sleep catches more
> things (e.g. tasks using wrong sleeping ways despite their wakeup):
>
>   # perf stat -a -e rv:error_sleep -e rv:error_wakeup -- stress-ng --cpu 5 --cpu-load 90 --sched rr -t 5
>
>    Performance counter stats for 'system wide':
>
>                285      rv:error_sleep                                         
>                 20      rv:error_wakeup                                        
>
> Provided I don't really know what's happening down there (I just let the
> stressor run free), this discrepancy is expected, right?

Thanks for testing it.

Beside monitoring low-prio task waking high-prio task, the rtapp/sleep
monitor also checks that user uses the correct APIs for sleeping. So
yes, this discrepancy is expected.

Nam