Hello, Martin. Good news. It seems I found the main cause of stuttering problem, but some small stutters are present anyway and lead to package applications.
Firstly, I've changed max. open file descriptors for default: and two times more for some applications like asterisk: postgresql: dovecot: in /etc/login.conf Stutters minimized down to near zero but haven't disappeared at all even without run applications I've mentioned below: The second cause of the problem is python-3.7.4 with nyx started. After 24 hours of running, python-3.7 process spend a lot of CPU time and cause huge 'stutters' in conclusion. Stutters also caused by mpv player itself. It stucks about every ~10s while playing 720p video (the same video as first time of testing and dumping). After some time on some random 'stutter' mpv forks to 8-10 processes and video plays at 5-7fps afterwards according to top -SH -s .3 like below: PID TID PRI NICE SIZE RES CPU COMMAND 88226 489263 10 0 320M 355M 8.15% mpv 88226 540626 10 0 320M 355M 4.32% mpv 88226 149957 10 0 320M 355M 3.69% mpv 88226 552640 10 0 320M 355M 5.16% mpv 88226 122371 10 0 320M 355M 4.43% mpv 88226 505040 10 0 320M 355M 3.05% mpv 88226 540526 10 0 320M 355M 3.85% mpv 88226 230215 10 0 320M 355M 3.76% mpv Any ideas how to mitigate it? Martin ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Friday, April 10, 2020 10:01 AM, Martin Pieuchot <[email protected]> wrote: > On 10/04/20(Fri) 09:42, Martin wrote: > > > Have you found anything regarding the issue? > > No I haven't. > > > Now I have time to add dt(4) in conf/GENERIC build & install a new kernel, > > build & install btrace(8) and set kern.allowdt=1 in /etc/sysctl.conf. > > Looks like dt(4) is a part of -current, but I can't move to -current right > > now. I'm going to do it once 6.7 is released. > > Thanks, > Martin
