Repository
Munin (master)
Last change
2018-08-16
Graph Categories
Family
auto
Capabilities
Keywords
Language
Shell
License
GPL-2.0-only
Authors

numa_

Name

numa - Plugin to graph NUMA page hits and misses

Applicable Systems

Linux kernels since 2.6.12

Configuration

This plugin does not require configuration.

The number after numa_ indicates the numa node. It is followed by either ‘memory’ or ‘process’.

numa_0_memory numa_1_process

Interpretation

Remote and foreign access takes more time than local access.

Hugepages have separate counters and aren’t included in these graphs.

Author

Copyright (C) 2014 Daniel Black, Open Query

License

GNU GPLv2

Reference

Reference: https://www.kernel.org/doc/Documentation/numastat.txt

Bugs

Possibly some.

Magic Markers

#%# family=auto
#%# capabilities=autoconf suggest
#!/bin/sh

: <<'=cut'

=head1 NAME

numa - Plugin to graph  NUMA page hits and misses

=head1 APPLICABLE SYSTEMS

Linux kernels since 2.6.12

=head1 CONFIGURATION

This plugin does not require configuration.

The number after numa_ indicates the numa node. It is followed by
either 'memory' or 'process'.

numa_0_memory
numa_1_process

=head1 INTERPRETATION

Remote and foreign access takes more time than local access.

Hugepages have separate counters and aren't included in these graphs.

=head1 AUTHOR

  Copyright (C) 2014 Daniel Black, Open Query

=head1 LICENSE

GNU GPLv2

=begin comment

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

=end comment

=head1 REFERENCE

Reference: https://www.kernel.org/doc/Documentation/numastat.txt

=head1 BUGS

Possibly some.

=head1 MAGIC MARKERS

  #%# family=auto
  #%# capabilities=autoconf suggest

=cut


# A single node isn't interesting so we look for node 1 (not node 0)
if [ "$1" = "autoconf" ]; then
  if [ -r /sys/devices/system/node/node1/numastat ]; then
    echo yes
  else
    echo "no (/sys/devices/system/node/node1/numastat not found)"
  fi
  exit 0
fi

if [ "$1" = "suggest" ]; then
  node=0
  while true; do
    if [ -r "/sys/devices/system/node/node${node}/numastat" ]; then
      echo "${node}_process"
      echo "${node}_memory"
    else
      exit 0
    fi
    node=$(( node + 1 ))
  done
fi

parts=${0##*numa_}
NODE=${parts%%_*}
RESOURCE=${0##*_}

if [ "$1" = "config" ]; then

  case "$RESOURCE" in
  process)
      echo 'graph_order local_node other_node'
      echo "graph_title NUMA allocations from processes running on node ${NODE}"
      echo 'graph_args -l 0'
      # shellcheck disable=SC2016
      echo 'graph_vlabel pages/${graph_period}'
      echo 'graph_info Shows where processes on this node got memory.'
      echo 'graph_category system'
      echo "local_node.label local_node"
      echo "local_node.info A process ran on this node and got memory from it."
      echo "local_node.type DERIVE"
      echo "local_node.min 0"
      echo "other_node.label other_node"
      echo "other_node.info A process ran on this node and got memory from another node."
      echo "other_node.type DERIVE"
      echo "other_node.min 0"
      ;;
  memory)
      echo 'graph_order numa_hit numa_miss numa_foreign interleave_hit'
      echo "graph_title NUMA Memory allocations against node ${NODE}"
      echo 'graph_args -l 0'
      # shellcheck disable=SC2016
      echo 'graph_vlabel pages/${graph_period}'
      echo 'graph_info Status of memory allocation requests of this node'
      echo 'graph_category system'
      echo "numa_hit.label numa_hit"
      echo "numa_hit.info A process wanted to allocate memory from this node and succeeded."
      echo "numa_hit.type DERIVE"
      echo "numa_hit.min 0"
      echo "numa_miss.label numa_miss"
      echo "numa_miss.info A process wanted to allocate memory from another node but ended up with memory from this node."
      echo "numa_miss.type DERIVE"
      echo "numa_miss.min 0"
      echo "numa_foreign.label numa_foreign"
      echo "numa_foreign.info A process wanted to allocate memory from this node but ended up with memory from another node."
      echo "numa_foreign.type DERIVE"
      echo "numa_foreign.min 0"
      echo "interleave_hit.label interleave_hit"
      echo "interleave_hit.info Interleaving wanted to allocate memory from this node and succeeded."
      echo "interleave_hit.type DERIVE"
      echo "interleave_hit.min 0"
      ;;
  *)
      echo >&2 "Empty or unknown resource requested: $RESOURCE"
      exit 1
      ;;
  esac
  exit 0
fi

numa_hit=U
numa_miss=U
numa_foreign=U
interleave_hit=U
local_node=U
other_node=U

while read -r line; do
  key=${line%% *}
  value=${line##* }
  case "${key}" in
  numa_hit)
    numa_hit=$value
    ;;
  numa_miss)
    numa_miss=$value
    ;;
  numa_foreign)
    numa_foreign=$value
    ;;
  interleave_hit)
    interleave_hit=$value
    ;;
  local_node)
    local_node=$value
    ;;
  other_node)
    other_node=$value
    ;;
  esac
done < "/sys/devices/system/node/node${NODE}/numastat"

case "$RESOURCE" in
  process)
    echo "local_node.value $local_node"
    echo "other_node.value $other_node"
    ;;
  memory)
    echo "numa_hit.value $numa_hit"
    echo "numa_miss.value $numa_miss"
    echo "numa_foreign.value $numa_foreign"
    echo "interleave_hit.value $interleave_hit"
    ;;
  *)
    echo >&2 "Empty or unknown resource requested: $RESOURCE"
    exit 1
    ;;
esac