/usr/lib/python3/dist-packages/glances/plugins/glances_memswap.py is in glances 2.7.1.1-2.
This file is owned by root:root, with mode 0o644.
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 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 | # -*- coding: utf-8 -*-
#
# This file is part of Glances.
#
# Copyright (C) 2015 Nicolargo <nicolas@nicolargo.com>
#
# Glances is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Glances 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""Swap memory plugin."""
from glances.compat import iterkeys
from glances.plugins.glances_plugin import GlancesPlugin
import psutil
# SNMP OID
# Total Swap Size: .1.3.6.1.4.1.2021.4.3.0
# Available Swap Space: .1.3.6.1.4.1.2021.4.4.0
snmp_oid = {'default': {'total': '1.3.6.1.4.1.2021.4.3.0',
'free': '1.3.6.1.4.1.2021.4.4.0'},
'windows': {'mnt_point': '1.3.6.1.2.1.25.2.3.1.3',
'alloc_unit': '1.3.6.1.2.1.25.2.3.1.4',
'size': '1.3.6.1.2.1.25.2.3.1.5',
'used': '1.3.6.1.2.1.25.2.3.1.6'}}
# Define the history items list
# All items in this list will be historised if the --enable-history tag is set
# 'color' define the graph color in #RGB format
items_history_list = [{'name': 'percent',
'description': 'Swap memory usage',
'color': '#00FF00',
'y_unit': '%'}]
class Plugin(GlancesPlugin):
"""Glances swap memory plugin.
stats is a dict
"""
def __init__(self, args=None):
"""Init the plugin."""
super(Plugin, self).__init__(args=args, items_history_list=items_history_list)
# We want to display the stat in the curse interface
self.display_curse = True
# Init the stats
self.reset()
def reset(self):
"""Reset/init the stats."""
self.stats = {}
@GlancesPlugin._log_result_decorator
def update(self):
"""Update swap memory stats using the input method."""
# Reset stats
self.reset()
if self.input_method == 'local':
# Update stats using the standard system lib
# Grab SWAP using the PSUtil swap_memory method
sm_stats = psutil.swap_memory()
# Get all the swap stats (copy/paste of the PsUtil documentation)
# total: total swap memory in bytes
# used: used swap memory in bytes
# free: free swap memory in bytes
# percent: the percentage usage
# sin: the number of bytes the system has swapped in from disk (cumulative)
# sout: the number of bytes the system has swapped out from disk
# (cumulative)
for swap in ['total', 'used', 'free', 'percent',
'sin', 'sout']:
if hasattr(sm_stats, swap):
self.stats[swap] = getattr(sm_stats, swap)
elif self.input_method == 'snmp':
# Update stats using SNMP
if self.short_system_name == 'windows':
# Mem stats for Windows OS are stored in the FS table
try:
fs_stat = self.get_stats_snmp(snmp_oid=snmp_oid[self.short_system_name],
bulk=True)
except KeyError:
self.reset()
else:
for fs in fs_stat:
# The virtual memory concept is used by the operating
# system to extend (virtually) the physical memory and
# thus to run more programs by swapping unused memory
# zone (page) to a disk file.
if fs == 'Virtual Memory':
self.stats['total'] = int(
fs_stat[fs]['size']) * int(fs_stat[fs]['alloc_unit'])
self.stats['used'] = int(
fs_stat[fs]['used']) * int(fs_stat[fs]['alloc_unit'])
self.stats['percent'] = float(
self.stats['used'] * 100 / self.stats['total'])
self.stats['free'] = self.stats[
'total'] - self.stats['used']
break
else:
self.stats = self.get_stats_snmp(snmp_oid=snmp_oid['default'])
if self.stats['total'] == '':
self.reset()
return self.stats
for key in iterkeys(self.stats):
if self.stats[key] != '':
self.stats[key] = float(self.stats[key]) * 1024
# used=total-free
self.stats['used'] = self.stats['total'] - self.stats['free']
# percent: the percentage usage calculated as (total -
# available) / total * 100.
self.stats['percent'] = float(
(self.stats['total'] - self.stats['free']) / self.stats['total'] * 100)
# Update the history list
self.update_stats_history()
# Update the view
self.update_views()
return self.stats
def update_views(self):
"""Update stats views."""
# Call the father's method
super(Plugin, self).update_views()
# Add specifics informations
# Alert and log
self.views['used']['decoration'] = self.get_alert_log(self.stats['used'], maximum=self.stats['total'])
def msg_curse(self, args=None):
"""Return the dict to display in the curse interface."""
# Init the return message
ret = []
# Only process if stats exist and plugin not disabled
if not self.stats or args.disable_swap:
return ret
# Build the string message
# Header
msg = '{:7} '.format('SWAP')
ret.append(self.curse_add_line(msg, "TITLE"))
# Percent memory usage
msg = '{:>6.1%}'.format(self.stats['percent'] / 100)
ret.append(self.curse_add_line(msg))
# New line
ret.append(self.curse_new_line())
# Total memory usage
msg = '{:8}'.format('total:')
ret.append(self.curse_add_line(msg))
msg = '{:>6}'.format(self.auto_unit(self.stats['total']))
ret.append(self.curse_add_line(msg))
# New line
ret.append(self.curse_new_line())
# Used memory usage
msg = '{:8}'.format('used:')
ret.append(self.curse_add_line(msg))
msg = '{:>6}'.format(self.auto_unit(self.stats['used']))
ret.append(self.curse_add_line(
msg, self.get_views(key='used', option='decoration')))
# New line
ret.append(self.curse_new_line())
# Free memory usage
msg = '{:8}'.format('free:')
ret.append(self.curse_add_line(msg))
msg = '{:>6}'.format(self.auto_unit(self.stats['free']))
ret.append(self.curse_add_line(msg))
return ret
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