I saw the thread here and bought "Optiplex 980" for $ 60.I have installed LinuxCNC 2.8.2 Debian10.It seems to have improved a little. I wish there was a better way.
LinuxCNC pc tests, version 20200930, started 09.03.2022 00:03:53
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Desktop environment : gnome
Windowmanager : Xfwm4
Displaymanager : lightdm
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Kernel related data:
Kernel 5.10.0-0.bpo.9-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet isolcpus=1"
Cpu idle driver: intel_idle
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Kernel modules data:
Check if pcspkr is loaded: Yes, may cause bigger latency.
can be eliminated using:
sudo echo "install pcspkr /bin/true" >/etc/modprobe.d/pcspkr.conf
Check if snd modules are loaded: No, which is good!
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Command for latency test is:
su linuxcnc -c "latency-histogram --bbinsize 1000 --base 25000 --sbinsize 1000 --nox 2>&1 | tee -a 1646751829.lat &"
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>>>Unexpected realtime delay on task 0 with period 25000<<<
[/spoiler]
Hmmm. I don't know how to attach the result.
How do you paste it in a gray window?
How do you paste it in a gray window? use Block quote in advanced editor ( [ quote ] and [ / quote ] without the blanks)
Further, run the test again, but increase base to say 50'000. 50'000 is actually what I am using on my 980. Also check out my GRUB_CMDLINE_LINUX_DEFAULT (dig in this thread to find the last, best one. Further, do
sudo echo "install pcspkr /bin/true" >/etc/modprobe.d/pcspkr.conf
It made some difference on my machine. In addition check out the colored parts in your output and compare them to what I have used. Ie.
Greez
Topic Author
