New and Working RTAI debs for 2.9

rodw wrote:

Life has got more complicated. With proper kernel tuning, latency can be better with Debian 13. I am in the process of publishing a second video about this on YouTube. Please refer to my channel.  www.youtube.com/@MrRodW
The yet to be published video should be watched before the current one.

My apologies and thanks. A beginner in these things missed something; I thought it was just copy and paste, but it's all different. My processor only has 4 cores, how could a number 7 be working? But now I think I understand, and I did some tests changing the isolcpus values. I stress-tested two YouTube videos and one video on the PC plus 8 glxgears and got this result.

cnbbom wrote:

andypugh wrote:

So, are you saying that
"addf pwmgen.make-pulses base-thread"
Causes the PC to shut down and need a reset?

Is it possible that your base-thread period is shorter than the base-thread latency?
Yes, disabling that line makes everything work except for the PWM spindle.

Is anything else running in the base thread? 
What is your base thread period. 

And can you please confirm that the machine actually crashes with a PWM in the base thread? 
 

andypugh wrote:

cnbbom wrote:

And can you please confirm that the machine actually crashes with a PWM in the base thread? 




 

As I explained here, I'm doing things manually and trying to learn, I don't know how to verify this, but remember that I did this test with preempt RT. That is, a clean installation of the linuxcnc CD with the modifications suggested by rodw. I tested with isolcpus 1, 2, 3 cores, then reduced it to 2.3 and even then the latency improved.

With the CD installation, PWM works, and the problem with trying to install the RTAI kernel was due to the high latency, which reached 120000.

This function comes in my PC's BIOS, "S3 video repost," and it was also part of a latency problem that I disabled.

I'm afraid of Google Translate. The translation doesn't seem legible; it looks distorted.

andypugh
Is this the correct information?