Update for i7 machine: After stopping process by process from top list IPIs goes lower during stutter, but stutters with 600-700 IPIs still present on near 'backgroud process free' 6.6 system with only mpv player running in foreground.
I want to mention, if it was important, all the time first stutter appears on 0:10s from the beginning of playing video, next stutter 0:20s, next 0:29s, next 0:39s etc. mpv 'Dropped' frames are decreased from 'Dropped: 4 or 14' from each stutter down to 'Dropped: 1'. So each stutter increments 'Dropped' counter ++1 for now instead of ++4 or ++14 with all the system processes running. In the moment of playing video, IPIs is about 600-700 when stutters, because most of system processes are disabled. When system stays with listed below processes, IPI 6-77 so stutters near 'invisible' to determine. top -SH -s .3 (current process list after disabling most of them) sh systat Xorg spectrwm xterm xterm init xenodm iostat ksh cron Xorg top sh ksh sh xenodm getty getty getty getty getty Can it be system's scheduler problem itself? Martin ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Friday, April 3, 2020 8:13 AM, Martin Pieuchot <[email protected]> wrote: > On 02/04/20(Thu) 18:40, Martin wrote: > > > Before starting the video 2017 bsdcon, disabled all the packages software > > on both AMD and i7 and run mpv player and test both machines. > > What do you mean? Which software are running? What do you see in > "top -SH -s .3"? > > > Shutters on both platforms happened when APM change low CPU frequency to > > high. Maybe it's an apmd issue? > > No it is not, it is just a symptom. > > Please let's stick to the original question: which piece of software are > you running when you see the stutters. Is it mpv(1)? > > When running mpv(1) do you see high IPIs? If so did you ktrace(1) it?
