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
  28 class GraphTemplateContextSwitches(base.GraphTemplate):
  29         name = "context-switches"
  30
  31         @property
  32         def rrd_graph(self):
  33                 _ = self.locale.translate
  34
  35                 return [
  36                         "AREA:ctxt%s:%-15s" % (
  37                                 lighten(PRIMARY, AREA_OPACITY),
  38                                 _("Context Switches"),
  39                         ),
  40                         "GPRINT:ctxt_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  41                         "GPRINT:ctxt_min:%12s\:" % _("Minimum") + " %6.2lf" ,
  42                         "GPRINT:ctxt_avg:%12s\:" % _("Average") + " %6.2lf",
  43                         "LINE1:ctxt%s" % PRIMARY,
  44                 ]
  45
  46         lower_limit = 0
  47
  48         @property
  49         def graph_title(self):
  50                 _ = self.locale.translate
  51                 return _("Context Switches")
  52
  53         @property
  54         def graph_vertical_label(self):
  55                 _ = self.locale.translate
  56                 return _("Context Switches/s")
  57
  58
  59 class ContextSwitchesObject(base.Object):
  60         rrd_schema = [
  61                 "DS:ctxt:DERIVE:0:U",
  62         ]
  63
  64         @property
  65         def id(self):
  66                 return "default"
  67
  68         def collect(self):
  69                 expr = r"^ctxt (\d+)$"
  70
  71                 with open("/proc/stat") as f:
  72                         for line in f.readlines():
  73                                 m = re.match(expr, line)
  74                                 if m:
  75                                         return m.group(1)
  76
  77
  78 class ContextSwitchesPlugin(base.Plugin):
  79         name = "context-switches"
  80         description = "Context Switches Plugin"
  81
  82         templates = [GraphTemplateContextSwitches]
  83
  84         @property
  85         def objects(self):
  86                 yield ContextSwitchesObject(self)