irqbalance <root
IRQBALANCE(1)                               irqbalance                              IRQBALANCE(1)

NAME
       irqbalance - distribute hardware interrupts across processors on a multiprocessor system

SYNOPSIS
       irqbalance

DESCRIPTION
       The purpose of irqbalance is to distribute hardware interrupts across processors on a mul‐
       tiprocessor system in order to increase performance.

OPTIONS
       -o, --oneshot
              Causes irqbalance to be run once, after which the daemon exits.

       -d, --debug
              Causes irqbalance to print extra debug information.  Implies --foreground.

       -f, --foreground
              Causes irqbalance to run in the foreground (without --debug).

       -j, --journal
              Enables log output optimized for systemd-journal.

       -h, --hintpolicy=[exact | subset | ignore]
              Set the policy for how IRQ kernel affinity hinting is treated.  Can be one of:

       exact IRQ affinity hint is applied unilaterally and never violated.

       subset IRQ is balanced, but the assigned object will be a subset of the affinity hint.

       ignore IRQ affinity hint value is completely ignored.

       The default value for hintpolicy is ignore.

       -p, --powerthresh=
              Set the threshold at which we attempt to move a CPU into  powersave  mode  If  more
              than    CPUs  are  more  than 1 standard deviation below the average CPU
              softirq workload, and no CPUs are more than 1 standard deviation  above  (and  have
              more  than  1  IRQ assigned to them), attempt to place 1 CPU in powersave mode.  In
              powersave mode, a CPU will not have any IRQs balanced to it, in an effort  to  pre‐
              vent that CPU from waking up without need.

       -i, --banirq=
              Add  the  specified  IRQ  to the set of banned IRQs. irqbalance will not affect the
              affinity of any IRQs on the banned list, allowing them to  be  specified  manually.
              This  option  is  addative  and can be specified multiple times. For example to ban
              IRQs 43  and  44  from  balancing,  use  the  following  command  line:  irqbalance
              --banirq=43 --banirq=44

       --deepestcache=
              This  allows a user to specify the cache level at which irqbalance partitions cache
              domains.  Specifying a deeper cache may allow a greater degree of  flexibility  for
              irqbalance  to  assign  IRQ  affinity to achieve greater performance increases, but
              setting a cache depth too large on some systems (specifically where all CPUs  on  a
              system  share  the  deepest cache level), will cause irqbalance to see balancing as
              unnecessary.  irqbalance --deepestcache=2

       The default value for deepestcache is 2.

       -l, --policyscript=