Re: Tracing busy processes/threads freezes/stalls the whole machine

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On Tue, 4 May 2021 15:28:12 +0200
Stefan Metzmacher <metze@xxxxxxxxx> wrote:

> Am 04.05.21 um 15:24 schrieb Steven Rostedt:
> > On Thu, 22 Apr 2021 16:26:57 +0200
> > Stefan Metzmacher <metze@xxxxxxxxx> wrote:
> >   
> >> Hi Steven, hi Ingo,
> >>  
> > 
> > Sorry, somehow I missed this.
> >   
> >> # But
> >> # trace-cmd record -e all -P 7  

Perhaps you could try something like this:

 # trace-cmd list -s |
    while read e ; do
      echo "testing $e";
      trace-cmd record -P 7 -e $e sleep 1;
    done

Which will enable each system at a time, and see if we can pin point what
is causing the lock up. Narrow it down to a tracing system.

-- Steve



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