/usr/share/munin/plugins/interrupts is in munin-node 1.4.6-3ubuntu3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 | #!/bin/sh
# -*- sh -*-
: << =cut
=head1 NAME
interrupts - Plugin to monitor the number of interrupts and context
switches on a system.
=head1 CONFIGURATION
No configuration
=head1 AUTHOR
Idea and base from Ragnar Wisløff.
=head1 LICENSE
Unknown license
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf
=cut
. $MUNIN_LIBDIR/plugins/plugin.sh
if [ "$1" = "autoconf" ]; then
if [ -r /proc/stat ]; then
echo yes
exit 0
else
echo no
exit 0
fi
fi
# If run with the "config"-parameter, give out information on how the
# graphs should look.
if [ "$1" = "config" ]; then
# The title of the graph
echo 'graph_title Interrupts and context switches'
# Arguments to "rrdtool graph". In this case, tell it that the
# lower limit of the graph is '0', and that 1k=1000 (not 1024)
echo 'graph_args --base 1000 -l 0'
# The Y-axis label
echo 'graph_vlabel interrupts & ctx switches / ${graph_period}'
# Graph category
echo 'graph_category system'
# Graph information
echo 'graph_info This graph shows the number of interrupts and context switches on the system. These are typically high on a busy system.'
echo 'intr.info Interrupts are events that alter sequence of instructions executed by a processor. They can come from either hardware (exceptions, NMI, IRQ) or software.'
echo 'ctx.info A context switch occurs when a multitasking operatings system suspends the currently running process, and starts executing another.'
# The fields. "label" is used in the legend. "label" is the only
# required subfield.
echo 'intr.label interrupts'
echo 'ctx.label context switches'
# Specify type
echo 'intr.type DERIVE'
echo 'ctx.type DERIVE'
# Set max (should always be done with counters) Note: this is max
# per second.
echo 'intr.max 100000'
echo 'ctx.max 100000'
echo 'intr.min 0'
echo 'ctx.min 0'
print_warning intr
print_critical intr
print_warning ctx
print_critical ctx
# Last, if run with the "config"-parameter, quit here (don't
# display any data)
exit 0
fi
# The real work
awk '$1 == "intr" { print "intr.value " $2 }
$1 == "ctxt" { print "ctx.value " $2 }' /proc/stat
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