Good Command to Check IRQ Balance Config From an sosreport

sosreport-c003psrwk10705-2025-09-02-ttfiozx]$ cat etc/sysconfig/irqbalance

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.

ONESHOT=yes

after starting, wait for a minute, 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 cpu’s should

be skipped when reblancing irqs. Cpu numbers which have their

corresponding bits set to one in this mask will not have any

irq’s assigned to them on rebalance

# #IRQBALANCE_BANNED_CPUS=

IRQBALANCE_ARGS

append any args here to the irqbalance daemon as documented in the man page

# #IRQBALANCE_ARGS=

IRQBALANCE_BANNED_CPUS=ffffffff,ffffff00,ffffffff,ffffff00 See IRQBALANCE_BANNED_CPUS=ffffffff,ffffff00,ffffffff,ffffff00 … this restricts irqbalance to putting IRQs onto only CPUs 0-7 and 64-71