Bad Max jitter / Latency

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15 Jan 2022 10:12 #231880 by remon_v
Hello,

I wanted to try LinuxCNC, so I bought myself a Chinese BOB and a nice small PC with paralllel port (Asrock Q1900B-ITX) but my latency is (very) bad.

when I run the test I see ‘last interval’ around 25000, but the max jitter is over 200.000.

Is my PC so bad or is this fixable somehow?

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15 Jan 2022 10:23 #231882 by tommylight
Replied by tommylight on topic Bad Max jitter / Latency
Try the Debian 7 Wheezy from
linuxcnc.org/downloads/
The following user(s) said Thank You: remon_v

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15 Jan 2022 20:57 - 15 Jan 2022 21:12 #231929 by remon_v
Replied by remon_v on topic Bad Max jitter / Latency
I think I fixed it now.. with the following edit (still on Debian 10):
GRUB_CMDLINE_LINUX_DEFAULT="quiet isolcpus=1,2,3"

Now the max jitter is below 15.000 ns
Last edit: 15 Jan 2022 21:12 by remon_v.
The following user(s) said Thank You: rodw

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