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 ..i18n 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#90EE90:%-15s" % _("Context Switches"),
  37                         "GPRINT:ctxt_max:%12s\:" % _("Maximum") + " %6.2lf" ,
  38                         "GPRINT:ctxt_min:%12s\:" % _("Minimum") + " %6.2lf" ,
  39                         "GPRINT:ctxt_avg:%12s\:" % _("Average") + " %6.2lf\\n",
  40                 ]
  41
  42         lower_limit = 0
  43
  44         @property
  45         def graph_title(self):
  46                 _ = self.locale.translate
  47                 return _("Context Switches")
  48
  49         @property
  50         def graph_vertical_label(self):
  51                 _ = self.locale.translate
  52                 return _("Context Switches/s")
  53
  54
  55 class ContextSwitchesObject(base.Object):
  56         rrd_schema = [
  57                 "DS:ctxt:DERIVE:0:U",
  58         ]
  59
  60         @property
  61         def id(self):
  62                 return "default"
  63
  64         def collect(self):
  65                 expr = re.compile(r"^ctxt (\d+)$")
  66
  67                 with open("/proc/stat") as f:
  68                         for line in f.readlines():
  69                                 m = re.match(expr, line)
  70                                 if m:
  71                                         return m.group(1)
  72
  73
  74 class ContextSwitchesPlugin(base.Plugin):
  75         name = "context-switches"
  76         description = "Context Switches Plugin"
  77
  78         templates = [GraphTemplateContextSwitches]
  79
  80         @property
  81         def objects(self):
  82                 yield ContextSwitchesObject(self)