Example rtirq config (/etc/sysconfig/rtirq)
#!/bin/sh
#
# Copyright (c) 2004-2006 rncbc aka Rui Nuno Capela.
# All rights reserved.
#
# /etc/sysconfig/rtirq
#
# Configuration for IRQ thread tunning,
# for realtime-preempt enabled kernels.
#
# IRQ thread service names
# (space separated list, from higher to lower priority).
RTIRQ_NAME_LIST="rtc ohci1394 snd i8042"
# Highest priority.
RTIRQ_PRIO_HIGH=80
# Priority decrease step.
RTIRQ_PRIO_DECR=10
# Whether to reset all IRQ threads to SCHED_OTHER.
RTIRQ_RESET_ALL=1
# On kernel configurations that support it,
# which services should be NOT threaded
# (space separated list).
RTIRQ_NON_THREADED="rtc snd"
# Process names which will be forced to the
# highest realtime priority range (99-91)
# (space separated list, from highest to lower priority).
RTIRQ_HIGH_LIST="softirq-timer softirq-hrtimer softirq-tasklet"