Current Motherboards

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4 years 3 months ago #248111 by JT
Replied by JT on topic Current Motherboards
I changed to Sid and the kernel now recognizes the video card and monitor.

I just started the latency-histogram --nobase --show --sbins 300

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4 years 3 months ago #248113 by tommylight
Replied by tommylight on topic Current Motherboards
Much better.

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4 years 3 months ago #248118 by JT
Replied by JT on topic Current Motherboards
So after a couple of hours the latency test still shows good, I've not touched anything in the BIOS.

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4 years 3 months ago #248124 by JT
Replied by JT on topic Current Motherboards
I went to the BIOS and did
F7 Advanced Mode
Ai Tweaker
ASUS Performance Enhancement = Enabled

That cut the latency in half.

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4 years 3 months ago #248136 by Bari
Replied by Bari on topic Current Motherboards
If you go into BIOS and disable SVM (virtual machines) and CPU Performance Boost and all the C states in power management, it will drop even further.

Using isolcpus should also drop your base thread to lower latency than what you are getting now on the servo thread.

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4 years 3 months ago #248141 by JT
Replied by JT on topic Current Motherboards
I don't recall seeing any of those in the BIOS but I'll look again in the morning.

Edit: SVM was off and I found a couple of things that was mentioned on the IRC and turned them off and now latency is <4us.

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4 years 3 months ago #248159 by JT
Replied by JT on topic Current Motherboards
I did find a couple of things in the BIOS that made a huge difference, I'm going to do the BIOS again and take some photos. Now I'm going to just try Debian 11.4 with the backport of linux-image-5.18.0-2rt-amd64 to see what I get for latency.

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4 years 3 months ago #248161 by tommylight
Replied by tommylight on topic Current Motherboards
Last screenshot is very good, two before are not, they have excursions out of vissible area and that might or might not cause issues with Mesa boards.

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4 years 3 months ago #248164 by JT
Replied by JT on topic Current Motherboards
Trying to get linux-image-5.18 on Debian 11.4 and I'm not having much luck. I can install the kernel but none above 5.10 will boot up.

I added the following sources
Code:
sudo nano /etc/apt/sources.list deb http://deb.debian.org/debian bullseye-backports main contrib non-free deb-src http://deb.debian.org/debian bullseye-backports main contrib non-free

But they don't show up in Synaptic Package Manager so I think they might be wrong...

JT

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4 years 3 months ago #248166 by kwarup
Replied by kwarup on topic Current Motherboards
try to use the bookworm distribution; it is in beta stage but has linuxcnc 2.9 pre already ..

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