Hello,
I've recently tried to run synthpod (both synthpod_alsa and synthpod_jack) under PipeWire (system is utilizing PipeWire's JACK implementation by default via emulating libjack.so). While the application starts, it quickly freezes the system as it allocates too much memory.
The issue seems to stem from here:
The first 8 iterations of the loop (0-7) are all fine and dsp_master->num_slaves have the value of 11. However, when the 9th iteration comes along, the value of dsp_master->num_slaves changes to > 32000 (differs every time - 32583, 32630, 32696, 32763) and as a result, the application tries to spawn that many threads, thus leading to resource exhaustion (out-of-memory).
Edit:
The issues seems to be an invalid array access.
A temporary workaround appears to be increasing MAX_SLAVES.
System:
Not sure if this is the same, my system does not freeze but the synthpod server (both jack and alsa) crashes
synhpod_jack
Synthpod 0.1.6507 Copyright (c) 2015-2016 Hanspeter Portner (dev@open-music-kontrollers.ch) Released under Artistic License 2.0 by Open Music Kontrollers (DSP) [Error] _dsp_slave_thread: pthread_setschedparam error (DSP) [Error] _dsp_slave_thread: pthread_setschedparam error (DSP) [Error] _dsp_slave_thread: pthread_setschedparam error Killedsynthpod_alsa
Synthpod 0.1.6507 Copyright (c) 2015-2016 Hanspeter Portner (dev@open-music-kontrollers.ch) Released under GNU General Public License 3 by Open Music Kontrollers playback : nchan : 2 fsamp : 48000 fsize : 1024 nfrag : 3 format : S32_LE capture : nchan : 2 fsamp : 48000 fsize : 1024 nfrag : 3 format : S32_LE synced Killed
reported by https://github.com/enilfodne
migrated from https://github.com/OpenMusicKontrollers/synthpod/issues/57
Fixed by: 02b2604269976da226d0ff6b88733be316f0f882