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- Munin (2.0)
- Last change
- 2018-06-30
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- auto
- Capabilities
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- License
- GPL-2.0-only
interrupts
Name
interrupts - Plugin to monitor the number of interrupts and context switches on a system.
Configuration
No configuration
Author
Idea and base from Ragnar Wisløff.
License
GPLv2
Magic Markers
#%# family=auto
#%# capabilities=autoconf
#!@@GOODSH@@
# -*- 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
GPLv2
=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
# shellcheck disable=SC2016
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'
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