Gautam Thaker

In my H96 TV box I have been running Armbian for over an year. Works great. Today I did a fresh install of: Armbian_community_25.5.0-trunk.256_Rk3318-box_bookworm_current_6.12.19_minimal.img.xz uname -a shows: rk3318-box> uname -a Linux rk3318-box 6.12.19-current-rockchip64 #2 SMP PREEMPT Thu Mar 13 12:02:20 UTC 2025 aarch64 GNU/Linux It is my understanding that Linux 6.12+ kernel already have all the real-time patches in the mainline kernel sources. All one needs to do is to 1. rebuild the kernel after configuring for FULL PREEMPT-RT support or (if kernel already built with this configured) 1a. reboot after providing to 'grub' a boot option "preempt=full" If any one has had experience running the full PREEMPT-RT kernel on rk3318 (or any Armbian box)? What are the best steps to get and natively build a new kernel for 6.12.19 on my rk3318 box (only show 27 Gb free though, may not be enough.)

The problem appears not be related to python version but fact that the standard kernel I am running with Armbian 23.8.3 jammy , Linux rk3318-box 6.1.50-current-rockchip64 #3 SMP PREEMPT Wed Aug 30 14:11:13 UTC 2023 aarch64 aarch64 aarch64 GNU/Linux does not appear to "hwlat" tracer compiled into the kernel. Can anyone confirm this? Is there a pointer to how to build a kernel with this tracer enabled?

I am running root@rk3318-box:/home/gthaker# uname -a Linux rk3318-box 6.1.50-current-rockchip64 #3 SMP PREEMPT Wed Aug 30 14:11:13 UTC 2023 aarch64 aarch64 aarch64 GNU/Linux on a H96 TV box that I am using as ADS-B hobby receiver. Generally works great. I was curious why I can't run "hwlatdetect" on my box. I get: root@rk3318-box:/home/gthaker# hwlatdetect --duration=10s Traceback (most recent call last): File "/usr/sbin/hwlatdetect", line 553, in <module> detect = Tracer() File "/usr/sbin/hwlatdetect", line 324, in __init__ raise DetectorNotAvailable("hwlat", "hwlat tracer not available") __main__.DetectorNotAvailable: ('hwlat', 'hwlat tracer not available') Error in sys.excepthook: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 153, in apport_excepthook with os.fdopen(os.open(pr_filename, FileNotFoundError: [Errno 2] No such file or directory: '/var/crash/_usr_sbin_hwlatdetect.0.crash' Original exception was: Traceback (most recent call last): File "/usr/sbin/hwlatdetect", line 553, in <module> detect = Tracer() File "/usr/sbin/hwlatdetect", line 324, in __init__ raise DetectorNotAvailable("hwlat", "hwlat tracer not available") __main__.DetectorNotAvailable: ('hwlat', 'hwlat tracer not available') root@rk3318-box:/home/gthaker# cat /etc/issue.net Armbian 23.8.3 jammy root@rk3318-box:/home/gthaker# cat /sys/kernel/tracing/tracing_on 1 I am familiar with Linux in general but not very familiar with what it takes to get this to work. Will I have to build a new kernel w/ some more tracing options enabled? Where might I find instructions? Thanks.