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

On Thu, 2026-07-02 at 09:25 +0200, Nam Cao wrote:

Gabriele Monaco [off-list ref] writes:

quoted

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.

Alright makes sense, thanks.

Reviewed-by: Gabriele Monaco <gmonaco@redhat.com>