Watchdog has bit!

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13 Jun 2020 04:28 #171364 by little_sparky
Hi All,

not sure if this is a Linuxcnc based error or PlasmaC but I had this watchdog has bit error come up before when I was using my machine as a router and now that I am finally running PlasmaC this error has come up again. Im not sure if its anything to do with plasmaC or just a coincidence but does anyone know how i can fix it?

Could it be an issue with my mesa card or is it definitely my computer?



Thanks in Advance
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13 Jun 2020 04:56 #171365 by PCW
Replied by PCW on topic Watchdog has bit!
That is usually an issue with latency on the host but a few other possibilities are
1. Watchdog timeout too short
2. Some other cause of communication dropouts
3. Host PC has Intel Ethernet chip but IRQ coalescing left on

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13 Jun 2020 04:59 #171366 by little_sparky
Replied by little_sparky on topic Watchdog has bit!
Okay thank you I’ll look into it.

Do I change watchdog timeout in Hal? And what should it be?

Also could it have anything to do with isolcpus?

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13 Jun 2020 05:07 - 13 Jun 2020 05:10 #171368 by PCW
Replied by PCW on topic Watchdog has bit!
What is your host CPU?

isolcpus sometime helps. but not always

Normally the watchdog time is set for 5 to 50 ms if you have a 1 ms servo thread

Increasing the timeout value may avoid the watchdog biting but
just masks the real problem: You have a real time error.
Last edit: 13 Jun 2020 05:10 by PCW.

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13 Jun 2020 05:15 #171370 by little_sparky
Replied by little_sparky on topic Watchdog has bit!
Dell Optiplex 990 SFF Intel Core i5 2400/3.1GHz, 4GB ram 120GB SSD WIN10

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13 Jun 2020 05:22 #171371 by PCW
Replied by PCW on topic Watchdog has bit!
OK that has a Intel MAC, have you turned off IRQ coalescing?

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13 Jun 2020 06:18 #171374 by little_sparky
Replied by little_sparky on topic Watchdog has bit!
I checked my /etc/network/interfaces file and it appears i have IRQ coalescing turned off.

I also looked into my interfaces.d/setup file and it looks pretty blank, should this have coalescing in it too?



I have also changed my isolcupus to isolcupus=3, i am running latency to see if this changes anything.

In this same file it has cstate=1, should this equal 0?

Files are attached.

interfaces



grub

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13 Jun 2020 11:11 #171404 by Mike_Eitel
Replied by Mike_Eitel on topic Watchdog has bit!
You must not have eth0 and eth1 the same adress

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13 Jun 2020 11:13 #171405 by little_sparky
Replied by little_sparky on topic Watchdog has bit!
Which one should I use? Or how do I know what one to use?

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13 Jun 2020 11:41 - 13 Jun 2020 11:41 #171408 by Mike_Eitel
Replied by Mike_Eitel on topic Watchdog has bit!
As pcw proposed you already switched of irq on eth1 so stick to that.
Just for completeness give it a mask of 255.255.255.0.
And make a direkt cable from that port to the mesa card. Nothing in between.

And i would reconfigure eth0 to dhcp and connect to the rest of your network.
Mike
Last edit: 13 Jun 2020 11:41 by Mike_Eitel.

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