nen“What I did to fix the xrun issue completely was to reserve one cpu core exclusivley for audio processing. In my case this means to run jackd, ecasound, mpd and alsa-in (and IRQ 16 which handles my usb sound cards) on CPU1. All other system processes and interrupt handeling for other IRQs was moved to CPU0. The system has only 2 cores.
(...)
GRUB_CMDLINE_LINUX_DEFAULT="nohz_full=1 isolcpus=1 ..."
nohz_full
disabled kernel ticking, which avoids high frequency interrupts from the kernel. In my case kernel ticking is disabled on CPU1. Thus CPU0 will handle this.
isolcpus
isolates cpu cores from the kernel scheduler, effectively leaving a core unused. Here CPU1 is excluded from kernel processes.
CPU1 is now no longer used by the kernel scheduler. So usage on CPU1 is almost 0. When jackd is started with a cpuaffinity of 1, it will run on CPU1. (...)”
Amadeus Paulussen
pixelarabcom
Jeremy Jongepier
