Edit: /etc/default/irqbalance (1399B)
# irqbalance is a daemon process that distributes interrupts across
# CPUs on SMP systems. The default is to rebalance once every 10
# seconds. This is the environment file that is specified to systemd via the
# EnvironmentFile key in the service unit file (or via whatever method the init
# system you're using has).
#
# IRQBALANCE_ONESHOT
# After starting, wait for ten seconds, then look at the interrupt
# load and balance it once; after balancing exit and do not change
# it again.
#
#IRQBALANCE_ONESHOT=
#
# IRQBALANCE_BANNED_CPUS
# 64 bit bitmask which allows you to indicate which CPUs should
# be skipped when reblancing IRQs. CPU numbers which have their
# corresponding bits set to one in this mask will not have any
# IRQs assigned to them on rebalance.
#
#IRQBALANCE_BANNED_CPUS=
#
# IRQBALANCE_BANNED_CPULIST
# The CPUs list which allows you to indicate which CPUs should
# be skipped when reblancing IRQs. CPU numbers in CPUs list will
# not have any IRQs assigned to them on rebalance.
#
# The format of CPUs list is:
#
,...,
# or a range:
# -
# or a mixture:
# ,...,-
#
#IRQBALANCE_BANNED_CPULIST=
#
# IRQBALANCE_ARGS
# Append any args here to the irqbalance daemon as documented in the man
# page.
#
#IRQBALANCE_ARGS=