Latency spikes on Dell Optiplex 7060 (i5 8500/32GB Ram, Radeon R5 430)

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17 Feb 2024 00:02 #293560 by tommylight
Can you please post this together with what you did here
forum.linuxcnc.org/18-computer/39371-res...or-use-with-linuxcnc
So it can be easily found.
Thank you.
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17 Feb 2024 08:03 #293585 by zmrdko
I did fresh install again to verify and installing irqbalance was the thing that made all the difference.

I will post details as you asked.
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17 Feb 2024 09:24 #293597 by zmrdko
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17 Feb 2024 11:24 #293603 by zmrdko
OK, I was little overreacting.
 
How does this makes sense?
servo-thread tmax is 128615, but even though I get error:Unexpected realtime delay on task0 with period 125000This Messagewill only display once persession.Run the Latency Test andresolve before continuing.p, li { white-space: pre-wrap; }
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17 Feb 2024 13:26 #293619 by Aciera
Latency is only one part, you also need to look at network latency. Look here:
forum.linuxcnc.org/49-basic-configuratio...ion-mesa-card#289479

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17 Feb 2024 14:02 #293622 by tommylight
Servo period "must" be 1000000 (1 million), changing it changes a lot of other stuff like PID values.
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18 Feb 2024 09:44 - 18 Feb 2024 09:51 #293673 by zmrdko
Unexpected realtime latency are very rare after some doing some more testing
Last edit: 18 Feb 2024 09:51 by zmrdko.

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18 Feb 2024 09:47 #293674 by zmrdko

Latency is only one part, you also need to look at network latency. Look here:
forum.linuxcnc.org/49-basic-configuratio...ion-mesa-card#289479
 

I'm running EtherCAT so I'm not sure network latency could be an issue here.

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18 Feb 2024 09:51 #293675 by zmrdko

Servo period "must" be 1000000 (1 million), changing it changes a lot of other stuff like PID values.
 

But I am trying to run 8kHz thread to match with my Delta B3 EtherCAT cycle time.

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18 Feb 2024 10:41 - 18 Feb 2024 10:43 #293678 by Aciera
Ah, Ethercat. Have you seen this (says in the comments that he has not been able to run 8kHz with the newer 6.xx kernel):


 
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Last edit: 18 Feb 2024 10:43 by Aciera.
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