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Linux local 5.0.0-23-lowlatency #24-Ubuntu SMP PREEMPT Mon Jul 29 16:17:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
jackdmp version 1.9.12 tmpdir /dev/shm protocol 8
Bitwig-studio version 3.0.1
USB2 Audio interface Tascam US16x02
Is possible run audio application with max priority for this application? For best performance and lowest latency without cruckling/buffer problem for audio application.
Situation
I reinstalled `Ubuntu studio 19.04`, `update`, `upgrade`, install DAW `Bitwig studio 3.0.1`, then install `indicator-cpufreq` (for changing my cpu to best performance).
Then I ran `jackd` in this configuration.
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/usr/bin/jackd -dalsa -dhw:US16x08 -r44000 -p128 -n2
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Model name: Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
CPU MHz: 3455.159
CPU max MHz: 3500,0000
CPU min MHz: 400,0000
NUMA node0 CPU(s): 0-3
Issue
When play the music in DAW, there are some crackling during the playing, and when I do something in DAW during playing (for example zooming or moving only), crackling is even worst.
Jackd log shows me many `xruns`. Is possible to identify what is cause of this `xruns`?
I swear I had same configuration before reinstall OS and it was OK for this configuration, no crackling at all during playing even when working in DAW during playing or recording, with same jack configuration.
I tried install older versions of `Ubuntu studio`, no effect, crackling still present, same.
Why is now crackling due playing in DAW? Applet `indicator-cpufreq` changed to best performance.
What is the magic? Before I reinstalled OS, everything works fine. I found something about `nice` utility. Is it what I need to setup? Is there a way to set max performance/priority to running application? Will it help?
Thank you very much for any informations.
Update
When I set `Performance` for cpu in `cpufreq` instead `Powersave`, it is even whorse! Where could be the catch?