1 #!/bin/bash
3 # collectd - contrib/exec-ksm.sh
4 # Copyright (C) 2011 Florian Forster
5 #
6 # Permission is hereby granted, free of charge, to any person obtaining a
7 # copy of this software and associated documentation files (the "Software"),
8 # to deal in the Software without restriction, including without limitation
9 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 # and/or sell copies of the Software, and to permit persons to whom the
11 # Software is furnished to do so, subject to the following conditions:
12 #
13 # The above copyright notice and this permission notice shall be included in
14 # all copies or substantial portions of the Software.
15 #
16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 # DEALINGS IN THE SOFTWARE.
23 #
24 # Authors:
25 # Florian Forster <octo at collectd.org>
27 HOSTNAME="${COLLECTD_HOSTNAME:-$(hostname -f)}"
28 INTERVAL="${COLLECTD_INTERVAL:-60}"
30 function read_file() {
31 local type="$1"
32 local type_instance="$2"
33 local file_name="/sys/kernel/mm/ksm/$3"
34 local ident="$HOSTNAME/exec-ksm/vmpage_number-${type_instance}"
36 echo "PUTVAL \"$ident\" interval=$INTERVAL N:$(< $file_name)"
37 }
39 if [[ 0 -eq $(< /sys/kernel/mm/ksm/run) ]]; then
40 echo "$0: KSM not active." >&2
41 exit 1
42 fi
44 while sleep "$INTERVAL"
45 do
46 read_file vmpage_number shared pages_shared
47 read_file vmpage_number saved pages_sharing
48 read_file vmpage_number unshared pages_unshared
49 read_file vmpage_number volatile pages_volatile
50 read_file total_operations scan full_scans
51 done
53 exit 0