set RT interupt priorities

irq_prio.py

def set_system_rt_priorities():
    prio_table = {
        'irq/8-rtc0': 90,
        'ktimersoftd/0': 85,
        'ktimersoftd/1': 85,
        'ktimersoftd/2': 85,
        'ktimersoftd/3': 85,
        'irq/88-eth0': 85,
        'irq/89-eth0-TxR': 85,
        'irq/90-eth0-TxR': 85,
        'irq/91-eth0-TxR': 85,
        'irq/92-eth0-TxR': 85
    }
    
    for key in prio_table:
        try:
            cmd, pid, prio = lookup_prio(key)
            new_prio = prio_table[key]
            if prio < new_prio :
                print("adjusting priority: {}, {}, {}->{}".format(
                      cmd, pid, prio, new_prio))
                chrt_cmd = "chrt -fp {} {}".format(new_prio, pid)
                subprocess.call(chrt_cmd, shell=True) 
        except subprocess.CalledProcessError:
            pass