Merge pull request #185 from seidler2547/master

New Plugin: HugePages usage

plugins/system/hugepages

@@ -0,0 +1,80 @@
+#!/usr/bin/gawk --exec
+#
+# HugePages monitoring plugin for munin
+#
+# This plugin monitors the usage of the Linux kernel HugePages, on some
+# architectures also called  Large Pages. It will show both pre-reserved
+# pages (via /prc/sys/vm/nr_hugepages), their usage and reserved size, as
+# well as HugePages allocated by the khugepaged (activated by the
+# transparent_hugepages kernel command line parameter). All values are
+# shown in (KiBi/MeBi/GiBi)Bytes.
+#
+# This plugin is used like many other munin plugins: put it in 
+# /usr/share/munin/plugins (or another appropriate location)
+# and create a symlink in /etc/munin/plugins:
+# > ln -s /usr/share/munin/plugins/hugepages /etc/munin/plugins
+# Then restart munin-node.
+#
+#
+# --
+#  Copyright 2012 Stefan Seidel <munin@stefanseidel.info>
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+# --
+#
+BEGIN {
+  if (ARGC > 1 && ARGV[1] == "config") {
+    print "graph_args --base 1024 -l 0"
+    print "graph_vlabel Bytes"
+    print "graph_title HugePages usage"
+    print "graph_category system"
+    print "graph_info This graph shows the usage of the kernel Huge Pages."
+    print "graph_order Total Rsvd Free Surp Anon"
+    print "Total.label used"
+    print "Total.draw AREA"
+    print "Total.info In-use Huge Page Memory"
+    print "Free.label free"
+    print "Free.draw STACK"
+    print "Free.info Unused Huge Page Memory."
+    print "Rsvd.label reserved"
+    print "Rsvd.draw STACK"
+    print "Rsvd.info Huge Pages that have been reserved but are not used."
+    print "Surp.label surplus"
+    print "Surp.draw STACK"
+    print "Surp.info Huge Pages that are in excess of the reserved amount, usually only greater than zero when the amount of Huge Pages is reduced while they are in use."
+    print "Anon.label anonymous"
+    print "Anon.draw STACK"
+    print "Anon.info Huge Pages that are in use by the transparent Huge Page allocator khugepaged."
+    CONF=1
+  }
+  ARGV[1] = "/proc/meminfo"
+  ARGC = 2
+  FS = "[: ]+"
+  OFS = ""
+  IGNORECASE = 1
+}
+
+CONF == 1 {
+  if (/Hugepagesize/) {
+    print "Total.cdef Total,Free,-,1024,",$2,",*,*"
+    print "Free.cdef Free,1024,",$2,",*,*,Rsvd,-"
+    print "Rsvd.cdef Rsvd,1024,",$2,",*,*"
+    print "Surp.cdef Surp,1024,",$2,",*,*"
+    print "Anon.cdef Anon,1024,*"
+  }
+}
+
+(CONF != 1) {
+  if (match($0,"(anon)?hugepages(_([^:]+))?[^i]",mats))
+    print mats[1],mats[3],".value ",$2
+}