How to install PREEMPT RT and use？

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
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1

how to install PREEMPT RT and use？

MY INFO：

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.

3

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

4

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

5

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

7

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