I just now checked my
dmesg because my server starts to crash now and then. There I read the following line:
perf interrupt took too long (2528 > 2500), lowering kernel.perf_event_max_sample_rate to 50000
which appears a couple of times.
I remember perf being a performance analytics tool and not remember having it installed. So I checked:
~$ dpkg -l *perf* dpkg-query: no packages found matching *perf*
- Is this a sign of an oncoming storm. Because this line comes a few times and then there are stackdumps starting with
rcu_sched detected stalls
- Where do these come from?