Raspberry Pi 4 and bad latency.. SOLUTIONS?

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1 year 7 months ago #324548 by hitchhiker
Hi guys!I am on a new Project and found a mesa 7c81 an 7i92 on the flewmarket... dont know why someone sell it on a flewmarket...i start reading about the 7c81 and look to my boxes and found a raspberry pi 4 b version with 8gb ram.. oki load the image for the sd card from the linuxcnc website and bring it up.i isolate cpu 1 2 3 but latency doesnt go down.

Any tips?
in the config i disable audio blueetooth and overclock to 6v and 2000mhz..

which information i can share to get the cow frome the ice?

thanks all


 

 

 

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1 year 7 months ago #324552 by tommylight
try this
Code:
latency-histogram --nobase --sbinsize 1000 --show

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1 year 7 months ago #324553 by hitchhiker
I forget 1 thing.. i use a 64gb micro sd card from the brand kexin from amazon.

amzn.eu/d/hXGglyV

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1 year 7 months ago #324554 by hitchhiker
same values or i am wrong??


 


thanks

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1 year 7 months ago #324564 by tommylight
Much better, move on to wiring and making chips!
Keep an eye when starting LinuxCNC if it complains about latency, it shows a warning usually when enabling it or later during use.

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1 year 7 months ago #324586 by rodw
Your latency is a pass, move on

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