src/collecty/plugins/contextswitches.py

   1 #!/usr/bin/python3
   2 ###############################################################################
   3 #                                                                             #
   4 # collecty - A system statistics collection daemon for IPFire                 #
   5 # Copyright (C) 2015 IPFire development team                                  #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 import re
  23
  24 from . import base
  25
  26 from ..colours import *
  27 from ..i18n import _
  28
  29 class GraphTemplateContextSwitches(base.GraphTemplate):
  30         name = "context-switches"
  31
  32         @property
  33         def rrd_graph(self):
  34                 _ = self.locale.translate
  35
  36                 return [
  37                         "AREA:ctxt%s:%-15s" % (
  38                                 util.lighten(PRIMARY, AREA_OPACITY),
  39                                 _("Context Switches"),
  40                         ),
  41                         "GPRINT:ctxt_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  42                         "GPRINT:ctxt_min:%12s\:" % _("Minimum") + " %6.2lf" ,
  43                         "GPRINT:ctxt_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  44                         "LINE1:ctxt%s" % PRIMARY,
  45                 ]
  46
  47         lower_limit = 0
  48
  49         @property
  50         def graph_title(self):
  51                 _ = self.locale.translate
  52                 return _("Context Switches")
  53
  54         @property
  55         def graph_vertical_label(self):
  56                 _ = self.locale.translate
  57                 return _("Context Switches/s")
  58
  59
  60 class ContextSwitchesObject(base.Object):
  61         rrd_schema = [
  62                 "DS:ctxt:DERIVE:0:U",
  63         ]
  64
  65         @property
  66         def id(self):
  67                 return "default"
  68
  69         def collect(self):
  70                 expr = re.compile(r"^ctxt (\d+)$")
  71
  72                 with open("/proc/stat") as f:
  73                         for line in f.readlines():
  74                                 m = re.match(expr, line)
  75                                 if m:
  76                                         return m.group(1)
  77
  78
  79 class ContextSwitchesPlugin(base.Plugin):
  80         name = "context-switches"
  81         description = "Context Switches Plugin"
  82
  83         templates = [GraphTemplateContextSwitches]
  84
  85         @property
  86         def objects(self):
  87                 yield ContextSwitchesObject(self)