How to install PREEMPT RT and use?

how to install PREEMPT RT and use?


b@ubuntu:~$ uname -a
Linux ubuntu 4.9.253-tegra #1 SMP PREEMPT Wed Apr 20 14:25:12 PDT 2022 aarch64 aarch64 aarch64 GNU/Linux
b@ubuntu:~$ sudo cyclictest -t 5 -p 80 -n
[sudo] password for b:
# /dev/cpu_dma_latency set to 0us
policy: fifo: loadavg: 0.12 0.05 0.01 1/534 29927

T: 0 (29851) P:80 I:1000 C:  12312 Min:      6 Act:    8 Avg:    8 Max:      55
T: 1 (29852) P:80 I:1500 C:   8208 Min:      6 Act:    8 Avg:    9 Max:     193
T: 2 (29853) P:80 I:2000 C:   6156 Min:      6 Act:    9 Avg:    8 Max:      60
T: 3 (29854) P:80 I:2500 C:   4924 Min:      6 Act:    8 Avg:    9 Max:      95
T: 4 (29855) P:80 I:3000 C:   4104 Min:      6 Act:    8 Avg:    8 Max:      38

His delay looks like no run preempt rt patch

I use sdk manger to install JETSON NANO IMG

My board HW is JETSON NANO 4G b001 ,and Integrated 16GB

I don’t think I need to follow this link, because I saw the official release that it seems that the new version has already installed the preempt rt patch.

For RT kernel need to download the kernel source and rebuild to apply to the system to enable it.

so ,i uanme -a show #1 SMP PREEMPT Wed ,Is this a fake information?
Are there official instructions for the latest rebuild to install preempt rt?
thank you

The RT kernel should have “rt” like 4.9.140-rt93"

This topic was automatically closed 14 days after the last reply. New replies are no longer allowed.