Hi Sebastian,
> > > > > The kernel version 4.1.37-rt43 is working fine, the kernel
> > > > > versions
> > > > > 4.4.39-rt50 and
> > > > 4.8.11-rt7 show the same strange behavior as 4.9.0-rt1.
> > > > > Something on the way between 4.1.37-rt43 and 4.4.39-rt50 seems
> > > > > to cause the
> > > > trouble.
> > > >
> > > > can you check if one of the earlier v4.4-RT releases (maybe start
> > > > with
> > > > -rt2 or -rt1) also shows this behaviour?
> > > > If not, would you have a testcase?
> > > I tested with 4.4.0-rt2.
> > > Here this issue occurs very rarely. I ran the gdb for about 30
> > > times, and here I got one hit.
> > > With the other kernel versions I got the issue in 20-40% of the cases.
> > >
> > > I will try out the other 4.4.0 releases...
> >
> > I ran more tests. The kernel 4.4.1-rt4 is working fairly fine (only
> > about one hit every 30 runs) but the kernel 4.4.1-rt5 is causing the issue very
> often.
>
> and 4.1.37-rt43 shows not SIGSTOPS in 100 runs?
That's right.
I used 4.1.37-rt43 and ran the test for 200 times. There was no single issue.
Regards
Mathias
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