Re: [Jack-Devel] Thread realtime priority

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DateMon, 09 Jan 2017 21:23:16 +0100
From Robin Gareus <[hidden] at gareus dot org>
To[hidden] at lists dot jackaudio dot org
Cc[hidden] at lists dot jackaudio dot org
In-Reply-ToAdrian Knoth Re: [Jack-Devel] Thread realtime priority 
On 01/09/2017 07:20 PM, Adrian Knoth wrote:
> On Linux, it's 1 .. 99.
> 

While we're at this, a quick heads up:

jackd can start various threads with given priority to 5 less than given
priority.  If you use jackd -P 5 .. (or less) things may fail somewhere
down the road (jack process threads, watchdog,..).

Recent versions of qjackctl don't allow to configure priorities < 6
anymore. jackd itself won't complain or print a warning.

Another related issue: ffado requests a high priority. IIRC
jack's process priority + 5.  There was a report on #lad the other day
where a user who was only allowed rt-prio 95, needed to start jackd -P
89.  jackd -P90 failed.

ciao,
robin
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