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'\" t
.\" Title: irqtop
.\" Author: [see the "AUTHOR(S)" section]
.\" Generator: Asciidoctor 2.0.20
.\" Date: 2025-03-18
.\" Manual: User Commands
.\" Source: util-linux 2.41
.\" Language: English
.\"
.TH "IRQTOP" "1" "2025-03-18" "util\-linux 2.41" "User Commands"
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.\}
.SH "NAME"
irqtop \- utility to display kernel interrupt information
.SH "SYNOPSIS"
.sp
\fBirqtop\fP [options]
.SH "DESCRIPTION"
.sp
Display kernel interrupt counter information in \fBtop\fP(1) style view.
.sp
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 \fB\-\-output\fP.
.SH "OPTIONS"
.sp
\fB\-o\fP, \fB\-\-output\fP \fIlist\fP
.RS 4
Specify which output columns to print. Use \fB\-\-help\fP to get a list of all supported columns. The default list of columns may be extended if list is specified in the format \fI+list\fP.
.RE
.sp
\fB\-c\fP, \fB\-\-cpu\-stat\fP \fImode\fP
.RS 4
Show per\-cpu statistics by specified mode. Available modes are: \fBauto\fP, \fBenable\fP, \fBdisable\fP. The default option \fBauto\fP detects the width of window, then shows the per\-cpu statistics if the width of window is large enough to show a full line of statistics.
.RE
.sp
\fB\-C\fP, \fB\-\-cpu\-list\fP \fIlist\fP
.RS 4
Specify cpus in list format to show.
.RE
.sp
\fB\-d\fP, \fB\-\-delay\fP \fIseconds\fP
.RS 4
Update interrupt output every \fIseconds\fP intervals.
.RE
.sp
\fB\-s\fP, \fB\-\-sort\fP \fIcolumn\fP
.RS 4
Specify sort criteria by column name. See \fB\-\-help\fP output to get column names. The sort criteria may be changes in interactive mode.
.RE
.sp
\fB\-S\fP, \fB\-\-softirq\fP
.RS 4
Show softirqs information.
.RE
.sp
\fB\-t\fP, \fB\-\-threshold\fP \fImin\fP
.RS 4
Only show IRQs with counters above the specified threshold. Human readable values are supported (e.g. 1.2K).
.RE
.sp
\fB\-h\fP, \fB\-\-help\fP
.RS 4
Display help text and exit.
.RE
.sp
\fB\-V\fP, \fB\-\-version\fP
.RS 4
Display version and exit.
.RE
.SH "INTERACTIVE MODE KEY COMMANDS"
.sp
\fBi\fP
.RS 4
sort by short irq name or number field
.RE
.sp
\fBt\fP
.RS 4
sort by total count of interrupts (the default)
.RE
.sp
\fBd\fP
.RS 4
sort by delta count of interrupts
.RE
.sp
\fBn\fP
.RS 4
sort by long descriptive name field
.RE
.sp
\fBq Q\fP
.RS 4
stop updates and exit program
.RE
.SH "AUTHORS"
.sp
.MTO "pizhenwei\(atbytedance.com" "Zhenwei Pi" ","
.MTO "kerolasa\(atiki.fi" "Sami Kerola" ","
\c
.MTO "kzak\(atredhat.com" "Karel Zak"
.MTO "robin\(atjarry.cc" "Robin Jarry" ""
.SH "REPORTING BUGS"
.sp
For bug reports, use the \c
.URL "https://github.com/util\-linux/util\-linux/issues" "issue tracker" "."
.SH "AVAILABILITY"
.sp
The \fBirqtop\fP command is part of the util\-linux package which can be downloaded from \c
.URL "https://www.kernel.org/pub/linux/utils/util\-linux/" "Linux Kernel Archive" "."
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