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# -*- coding: utf-8 -*- |
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# |
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# This file is part of Glances. |
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# |
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# Copyright (C) 2019 Nicolargo <[email protected]> |
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# |
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# Glances is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser General Public License as published by |
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# the Free Software Foundation, either version 3 of the License, or |
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# (at your option) any later version. |
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# |
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# Glances is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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"""Swap memory plugin.""" |
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from glances.compat import iterkeys |
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from glances.plugins.glances_plugin import GlancesPlugin |
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import psutil |
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# SNMP OID |
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# Total Swap Size: .1.3.6.1.4.1.2021.4.3.0 |
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# Available Swap Space: .1.3.6.1.4.1.2021.4.4.0 |
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snmp_oid = {'default': {'total': '1.3.6.1.4.1.2021.4.3.0', |
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'free': '1.3.6.1.4.1.2021.4.4.0'}, |
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'windows': {'mnt_point': '1.3.6.1.2.1.25.2.3.1.3', |
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'alloc_unit': '1.3.6.1.2.1.25.2.3.1.4', |
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'size': '1.3.6.1.2.1.25.2.3.1.5', |
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'used': '1.3.6.1.2.1.25.2.3.1.6'}} |
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# Define the history items list |
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# All items in this list will be historised if the --enable-history tag is set |
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items_history_list = [{'name': 'percent', |
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'description': 'Swap memory usage', |
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'y_unit': '%'}] |
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class Plugin(GlancesPlugin): |
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"""Glances swap memory plugin. |
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stats is a dict |
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""" |
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def __init__(self, args=None, config=None): |
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"""Init the plugin.""" |
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super(Plugin, self).__init__(args=args, |
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config=config, |
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items_history_list=items_history_list) |
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# We want to display the stat in the curse interface |
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self.display_curse = True |
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@GlancesPlugin._check_decorator |
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@GlancesPlugin._log_result_decorator |
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def update(self): |
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"""Update swap memory stats using the input method.""" |
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# Init new stats |
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stats = self.get_init_value() |
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if self.input_method == 'local': |
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# Update stats using the standard system lib |
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# Grab SWAP using the psutil swap_memory method |
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try: |
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sm_stats = psutil.swap_memory() |
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except RuntimeError: |
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# Crash on startup on Illumos when no swap is configured #1767 |
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pass |
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else: |
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# Get all the swap stats (copy/paste of the psutil documentation) |
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# total: total swap memory in bytes |
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# used: used swap memory in bytes |
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# free: free swap memory in bytes |
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# percent: the percentage usage |
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# sin: the number of bytes the system has swapped in from disk (cumulative) |
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# sout: the number of bytes the system has swapped out from disk |
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# (cumulative) |
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for swap in ['total', 'used', 'free', 'percent', |
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'sin', 'sout']: |
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if hasattr(sm_stats, swap): |
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stats[swap] = getattr(sm_stats, swap) |
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elif self.input_method == 'snmp': |
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# Update stats using SNMP |
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if self.short_system_name == 'windows': |
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# Mem stats for Windows OS are stored in the FS table |
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try: |
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fs_stat = self.get_stats_snmp(snmp_oid=snmp_oid[self.short_system_name], |
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bulk=True) |
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except KeyError: |
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self.reset() |
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else: |
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for fs in fs_stat: |
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# The virtual memory concept is used by the operating |
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# system to extend (virtually) the physical memory and |
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# thus to run more programs by swapping unused memory |
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# zone (page) to a disk file. |
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if fs == 'Virtual Memory': |
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stats['total'] = int( |
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fs_stat[fs]['size']) * int(fs_stat[fs]['alloc_unit']) |
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stats['used'] = int( |
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fs_stat[fs]['used']) * int(fs_stat[fs]['alloc_unit']) |
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stats['percent'] = float( |
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stats['used'] * 100 / stats['total']) |
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stats['free'] = stats['total'] - stats['used'] |
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break |
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else: |
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stats = self.get_stats_snmp(snmp_oid=snmp_oid['default']) |
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if stats['total'] == '': |
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self.reset() |
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return stats |
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for key in iterkeys(stats): |
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if stats[key] != '': |
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stats[key] = float(stats[key]) * 1024 |
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# used=total-free |
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stats['used'] = stats['total'] - stats['free'] |
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# percent: the percentage usage calculated as (total - |
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# available) / total * 100. |
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stats['percent'] = float( |
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(stats['total'] - stats['free']) / stats['total'] * 100) |
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# Update the stats |
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self.stats = stats |
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return self.stats |
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def update_views(self): |
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"""Update stats views.""" |
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# Call the father's method |
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super(Plugin, self).update_views() |
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# Add specifics informations |
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# Alert and log |
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if 'used' in self.stats and 'total' in self.stats: |
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self.views['used']['decoration'] = self.get_alert_log(self.stats['used'], maximum=self.stats['total']) |
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def msg_curse(self, args=None, max_width=None): |
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"""Return the dict to display in the curse interface.""" |
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# Init the return message |
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ret = [] |
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# Only process if stats exist and plugin not disabled |
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if not self.stats or self.is_disable(): |
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return ret |
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# Build the string message |
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# Header |
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msg = '{}'.format('SWAP') |
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ret.append(self.curse_add_line(msg, "TITLE")) |
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msg = ' {:3}'.format(self.trend_msg(self.get_trend('percent'))) |
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ret.append(self.curse_add_line(msg)) |
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# Percent memory usage |
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msg = '{:>6.1%}'.format(self.stats['percent'] / 100) |
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ret.append(self.curse_add_line(msg)) |
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# New line |
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ret.append(self.curse_new_line()) |
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# Total memory usage |
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msg = '{:8}'.format('total:') |
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ret.append(self.curse_add_line(msg)) |
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msg = '{:>6}'.format(self.auto_unit(self.stats['total'])) |
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ret.append(self.curse_add_line(msg)) |
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# New line |
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ret.append(self.curse_new_line()) |
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# Used memory usage |
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msg = '{:8}'.format('used:') |
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ret.append(self.curse_add_line(msg)) |
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msg = '{:>6}'.format(self.auto_unit(self.stats['used'])) |
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ret.append(self.curse_add_line( |
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msg, self.get_views(key='used', option='decoration'))) |
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# New line |
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ret.append(self.curse_new_line()) |
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# Free memory usage |
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msg = '{:8}'.format('free:') |
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ret.append(self.curse_add_line(msg)) |
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msg = '{:>6}'.format(self.auto_unit(self.stats['free'])) |
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ret.append(self.curse_add_line(msg)) |
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return ret |
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nicolargo /
glances
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