Remove "unexpected realtime delay" error message

More
02 Jan 2015 02:38 #54470 by REEEN
Hello everyone,
My question is very simple, is it possible to remove the unexpeczed realtime delay error message?
I hate that it always comes up when I start my machine and I use Mesa cards, so I don't mind.

Greets Rene

Please Log in or Create an account to join the conversation.

More
02 Jan 2015 03:49 #54471 by BigJohnT
Mesa cards really don't have anything to do with that error. It is because you had a real time delay. Did you run the latency test for an extended period of time to check for latency problems?

JT

Please Log in or Create an account to join the conversation.

More
02 Jan 2015 04:28 - 02 Jan 2015 04:29 #54472 by PCW
Lots of people have complained of real time delays at startup (on all types of hardware setups)
I suspect that its related to caching which means the first few thread invocations run more
slowly that subsequent ones.

If you are running on slow hardware (say a Atom D525 or similar)that can barely run a 1 KHz servo
thread with complex hal file, you may see these errors occasionally

The latency test doesn't see them because it doesn't actually do anything that stresses memory or I/O.

A possible workaround is to delay the real time delay checking for some number of servo thread periods at startup
Last edit: 02 Jan 2015 04:29 by PCW.

Please Log in or Create an account to join the conversation.

More
02 Jan 2015 17:28 #54487 by REEEN
Yes I know it has nothing to do with the mesa cards and my latency is very good it is under 10.000 ns.

I think it is exactly what PCW says it always appears on start up.

How can I delay the latency test ?

Thank you :)

Please Log in or Create an account to join the conversation.

More
03 Jan 2015 17:15 #54517 by DaBit
LinuxCNC startup is a very heavy system load anyway; I am also seeing data getting lost on the FTDI USB->RS485 converters for example.
Maybe some method to lessen this load would be another option?

Please Log in or Create an account to join the conversation.

Time to create page: 0.085 seconds
Powered by Kunena Forum