29 Jun
2019
29 Jun
'19
2:42 p.m.
Cool, that worked!
I just added those lines to the simple_client.c, and now I get
$ ps -o cmd,pid,pri,ni,rtprio -T $(pidof simple_client)
CMD PID PRI NI RTPRIO
./simple_client 9667 19 0 -
./simple_client 9667 19 0 -
./simple_client 9667 45 - 5
./simple_client 9667 45 - 5
Before adding the lines, there was only one "RTPRIO" thread. This proves
it worked :)
Am 2019-06-29 20:49, schrieb Robin Gareus:
On 6/29/19 8:32 PM, Johannes Lorenz wrote:
Thanks!
Creating threads is not realtime safe, so it must not be called from
the
jack callback.
You usually create the threads at the same time when you connect to
jack
and register the process callback, which is your main
application/engine
thread, likely even main().
Yes, see
http://jackaudio.org/api/group__ClientThreads.html
libjack offers jack_client_create_thread(), which is useful for
helper
threads.
Where should our DAW call this function? From inside the jack
callback,
or from outside (e.g. by the `main()` thread)? Also, what should we pass for the
"priority" argument? Probably the
result of `jack_client_real_time_priority` for the already running
realtime thread?
Yes. Something like:
jack_client_t* jc;
jack_native_thread_t tid;
if (jack_client_create_thread (
jc, &tid,
jack_client_real_time_priority (jc),
jack_is_realtime (jc),
start_worker_method, NULL)
) { /* failed to create realtime thread */ }
Cheers!
robin
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