Apps running on Xorg stutter or hiccup (but running glxgears stops it!)

[Alexander88207]

I have the same problem, except that glxgears also stutters every second just as all other moving things like scrolling, videos etc. powerd indicates a higher cpu usage every second. How can I find out which process runs that shortly every second?

Is it possible that you are using xf86-video-intel?

On my small cheap laptop with a cherry lake it works with modesetting but if I use xf86-video-intel then everything is very slow and jerky.

 

[laufdi]

Is it possible that you are using xf86-video-intel?

yes

On my small cheap laptop with a cherry lake it works with modesetting

There I found:
"Stutter free video playback is not possible on Gemini Lake (and likely also not on Skylake and others) in both Wayland and Xorg sessions with modesetting driver."

Sway, Weston & Xorg modesetting - mistimed frames in mpv due to vsync jitter spikes with Intel GPU (#928) · Issues · xorg / xserver · GitLab

Originally reported here: https://github.com/mpv-player/mpv/issues/7106 Stutter free video playback is not possible on Gemini Lake (and likely also not on Skylake and...

gitlab.freedesktop.org

I removed the (old?) xorg.conf and now at least the devd problem is gone! (Please don't ask ;{ )
Only small secondly stutters are left when firefox is running ...

 

[laufdi]

I removed the (old?) xorg.conf and now at least the devd problem is gone!

no, it's not. It comes back after a while.
With modesetting btw. 3d graphics doesn't really work.

 

[grahamperrin]

To the opening poster:

… I will play around with this …

Did you reach a conclusion?

 

[priyadarshan]

I was experiencing exactly the same issue, on an AMD Ryzen 9 5900HX cpu, Matisse GPU, "green_sardine" firmware,

pciconf -lv | grep -i vga
vgapci0@pci0:4:0:0:     class=0x030000 rev=0xc4 hdr=0x00 vendor=0x1002 device=0x1638 subvendor=0x1002 subdevice=0x0123
    subclass   = VGA

This fixed it:

sysctl kern.sched.steal_thresh=1

I found it on this mailing list message, as linked from this reddit comment.

 

[willbprog127]

Wow, lots of activity on this post. I have not received notifications about most of it so just revisiting today. priyadarshan Thanks for the tip! I'm not using FreeBSD at the moment, but I'll definitely have to revisit your post if I do.

Thanks everyone!

 

[laufdi]

sysctl kern.sched.steal_thresh=1

I found it on this mailing list message, as linked from this reddit comment.

Thanks a lot, but it doesn't help at all

 

[T-Daemon]

sysctl kern.sched.steal_thresh=1

Thanks a lot, but it doesn't help at all

Try kern.sched.steal_thresh=0 .

microfreezes - FreeBSD 13

Hi! FreeBSD 13.1 (13.0) FreeBSD wcsn 13.1-RELEASE FreeBSD 13.1-RELEASE releng/13.1-n250148-fc952ac2212 GENERIC amd64 CPU: AMD Ryzen 5 3600 6-Core Processor (3600.10-MHz K8-class CPU) vendor = 'Advanced Micro Devices, Inc. [AMD/ATI]' device = 'Lexa PRO [Radeon...

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