irqtop(1) — Linux manual page

NAME \| SYNOPSIS \| DESCRIPTION \| OPTIONS \| INTERACTIVE MODE KEY COMMANDS \| AUTHORS \| REPORTING BUGS \| AVAILABILITY

IRQTOP(1)                     User Commands                     IRQTOP(1)

NAME top

       irqtop - display kernel interrupt information

SYNOPSIS top

       irqtop [options]

DESCRIPTION top

       Display interrupt-counter information from the kernel in the style
       of top(1).

       The default output is subject to change. So whenever possible, you
       should avoid using default outputs in your scripts. Always
       explicitly define expected columns by using --output.

OPTIONS top

       -o, --output list
           Specify which output columns to print. Use --help to get a
           list of all supported columns. The default list of columns may
           be extended if list is specified in the format +list.

       -b, --batch
           Send the produced tables to stdout instead of to a static
           screen. This can be used for sending the output to other
           programs or to a file.

       -c, --cpu-stat when
           Whether to show the per-CPU statistics. Possible arguments
           are: auto, never, always. The default is auto: the per-CPU
           statistics are shown when the window is wide enough for the
           full list of CPUs.

       -C, --cpu-list list
           Specify cpus in list format to show.

       -d, --delay seconds
           Update the tables every this number of seconds.

       -J, --json
           Use JSON output format. Implies --batch.

       -n, --iter number
           Specifies the maximum iterations before quitting.

       -s, --sort column
           Specify sort criteria by column name. See --help output to get
           column names. The sort criteria may be changes in interactive
           mode.

       -S, --softirq
           Show softirqs information.

       -t, --threshold min
           Only show IRQs with counters above the specified threshold.
           Human readable values are supported (e.g. 1.2K).

       -h, --help
           Display help text and exit.

       -V, --version
           Display version and exit.

INTERACTIVE MODE KEY COMMANDS top

       i
           sort by short irq name or number field

       t
           sort by total count of interrupts (the default)

       d
           sort by delta count of interrupts

       n
           sort by long descriptive name field

       q Q
           stop updates and exit program

AUTHORS top

       Zhenwei Pi <pizhenwei@bytedance.com>, Sami Kerola
       <kerolasa@iki.fi>, Karel Zak <kzak@redhat.com> Robin Jarry
       <robin@jarry.cc>

REPORTING BUGS top

       For bug reports, use the issue tracker
       <https://github.com/util-linux/util-linux/issues>.

AVAILABILITY top

       The irqtop command is part of the util-linux package which can be
       downloaded from Linux Kernel Archive
       <https://www.kernel.org/pub/linux/utils/util-linux/>. This page is
       part of the util-linux (a random collection of Linux utilities)
       project. Information about the project can be found at 
       ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you have a
       bug report for this manual page, send it to
       util-linux@vger.kernel.org. This page was obtained from the
       project's upstream Git repository
       ⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
       2025-08-11. (At that time, the date of the most recent commit that
       was found in the repository was 2025-08-05.) If you discover any
       rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page,
       or you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a
       mail to man-pages@man7.org

util-linux 2.42-start-521-ec46  2025-08-09                      IRQTOP(1)