[ardour-users] Jack RT and watchdog thread

Jack O'Quin jack.oquin at gmail.com
Mon Aug 28 09:01:19 PDT 2006

On 8/28/06, David Causse <nomoa at wanadoo.fr> wrote:
> Hi,
> I recently switched to a patched version PAM able to use rt_priority in
> limits.conf.
> I launched jack and got a warning that it was unable to set priority
> (this value was X+10 with -P X).
> I looked at the code and I found that a whatchdog thread is started
> like that but if it failed to set the priority this thread has normal prio
> and jack doesn't failed isn't it dangerous?

Yes, it is.  You won't see any problem unless jackd or one of its
clients goes into a realtime loop, which is fairly rare.

JACK should probably fail in this case.  I am surprised it does not.
As a workaround, set the rt_priority in limits.conf to at least 80.

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