Setting thread_sched_policy to SCHED_RR/FIFO stops all messages from being published

Software ROS2
1 
        advanced: # WARNING: do not modify unless you are confident of what you are doing
            # Reference documentation: https://man7.org/linux/man-pages/man7/sched.7.html
            thread_sched_policy: "SCHED_FIFO" #"SCHED_BATCH" # 'SCHED_OTHER', 'SCHED_BATCH', 'SCHED_FIFO', 'SCHED_RR' - NOTE: 'SCHED_FIFO' and 'SCHED_RR' require 'sudo'
            thread_grab_priority: 50 # ONLY with 'SCHED_FIFO' and 'SCHED_RR' - [1 (LOW) z-> 99 (HIGH)] - NOTE: 'sudo' required
            thread_sensor_priority: 70 # ONLY with 'SCHED_FIFO' and 'SCHED_RR' - [1 (LOW) z-> 99 (HIGH)] - NOTE: 'sudo' required
            thread_pointcloud_priority: 60 # ONLY with 'SCHED_FIFO' and 'SCHED_RR' - [1 (LOW) z-> 99 (HIGH)] - NOTE: 'sudo' required

is this feature working?

2

Yes, you need root privileges to set these parameters