From: Michael Tremer <michael.tremer@ipfire.org>
Date: Mon, 23 Nov 2015 00:56:23 +0000 (+0000)
Subject: Add context switches plugin
X-Git-Tag: 004~12
X-Git-Url: http://git.ipfire.org/?p=collecty.git;a=commitdiff_plain;h=27f02dbd8b357f4ced1f9040837f2dbdfef1a3b8

Add context switches plugin

This monitors the number of context switches of the entire system.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/Makefile.am b/Makefile.am
index 2a2f233..1c4808e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -86,6 +86,7 @@ collectydir = $(pythondir)/collecty
 
 collectyplugins_PYTHON = \
 	src/collecty/plugins/base.py \
+	src/collecty/plugins/contextswitches.py \
 	src/collecty/plugins/conntrack.py \
 	src/collecty/plugins/cpufreq.py \
 	src/collecty/plugins/disk.py \
diff --git a/src/collecty/plugins/__init__.py b/src/collecty/plugins/__init__.py
index 648ac83..a82e236 100644
--- a/src/collecty/plugins/__init__.py
+++ b/src/collecty/plugins/__init__.py
@@ -22,6 +22,7 @@
 from .base import Timer, get
 
 from . import base
+from . import contextswitches
 from . import conntrack
 from . import cpufreq
 from . import disk
diff --git a/src/collecty/plugins/contextswitches.py b/src/collecty/plugins/contextswitches.py
new file mode 100644
index 0000000..f9194a0
--- /dev/null
+++ b/src/collecty/plugins/contextswitches.py
@@ -0,0 +1,87 @@
+#!/usr/bin/python3
+###############################################################################
+#                                                                             #
+# collecty - A system statistics collection daemon for IPFire                 #
+# Copyright (C) 2015 IPFire development team                                  #
+#                                                                             #
+# This program is free software: you can redistribute it and/or modify        #
+# it under the terms of the GNU General Public License as published by        #
+# the Free Software Foundation, either version 3 of the License, or           #
+# (at your option) any later version.                                         #
+#                                                                             #
+# This program 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 General Public License for more details.                                #
+#                                                                             #
+# You should have received a copy of the GNU General Public License           #
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
+#                                                                             #
+###############################################################################
+
+import re
+
+from . import base
+
+from ..i18n import _
+
+class GraphTemplateContextSwitches(base.GraphTemplate):
+	name = "context-switches"
+
+	@property
+	def rrd_graph(self):
+		_ = self.locale.translate
+
+		return [
+			"DEF:ctxt=%(file)s:ctxt:AVERAGE",
+
+			"AREA:ctxt#90EE90:%-15s" % _("Context Switches"),
+			"VDEF:ctxtmax=ctxt,MAXIMUM",
+			"VDEF:ctxtmin=ctxt,MINIMUM",
+			"VDEF:ctxtavg=ctxt,AVERAGE",
+			"GPRINT:ctxtmax:%12s\:" % _("Maximum") + " %6.2lf" ,
+			"GPRINT:ctxtmin:%12s\:" % _("Minimum") + " %6.2lf" ,
+			"GPRINT:ctxtavg:%12s\:" % _("Average") + " %6.2lf\\n",
+		]
+
+	lower_limit = 0
+
+	@property
+	def graph_title(self):
+		_ = self.locale.translate
+		return _("Context Switches")
+
+	@property
+	def graph_vertical_label(self):
+		_ = self.locale.translate
+		return _("Context Switches/s")
+
+
+class ContextSwitchesObject(base.Object):
+	rrd_schema = [
+		"DS:ctxt:DERIVE:0:U",
+	]
+
+	@property
+	def id(self):
+		return "default"
+
+	def collect(self):
+		expr = re.compile(r"^ctxt (\d+)$")
+
+		with open("/proc/stat") as f:
+			for line in f.readlines():
+				m = re.match(expr, line)
+				if m:
+					return m.group(1)
+
+
+class ContextSwitchesPlugin(base.Plugin):
+	name = "context-switches"
+	description = "Context Switches Plugin"
+
+	templates = [GraphTemplateContextSwitches]
+
+	@property
+	def objects(self):
+		yield ContextSwitchesObject(self)