Preempt Real-time patch on Jetson NX but no performance change

I have successfully patched the Preempt RT patch to the board but the patch gives the similar result as without patch.
when doing test
taskset -c 1 cyclictest -smp 99 -i 250
gives:

/dev/cpu_dma_latency set to 0us

T: 0 ( 9597) P:99 I:250 C: 6205 Min: 7 Act: 27 Avg: 19 Max: 212
T: 0 ( 9600) P:99 I:250 C: 12601 Min: 8 Act: -229 Avg:6202591432450390016 Max: -149
Not sure what’s going on and can someone help please

Our team will do the investigation and provide suggestions soon. Thanks

Could you try below command.

sudo su
echo -1 > /proc/sys/kernel/sched_rt_runtime_us

Hi, thanks for the reply and I tried this command but the result is still not improved. The result is as:
taskset -c 1 cyclictest -smp 99 -i 250

/dev/cpu_dma_latency set to 0us

policy: fifo: loadavg: 0.27 0.87 0.58 3/809 9012

T: 0 ( 9012) P:99 I:250 C: 56273 Min: 13 Act: 28 Avg: 20 Max: 272

What your BSP version?
cat /etc/nv_tegra_release

Try boost system to max performance mode. Confirm the power ID by /etc/nvpmodel.conf

sudo nvpmodel -m 8
sudo jetson_clocks