116 lines
4.1 KiB
Python
Executable File
116 lines
4.1 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# ksm
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#
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# Plugin to monitor ksm - Kernel Samepage Merging.
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#
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# Author: Markus Heberling <markus@tisoft.de>
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#
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# v1.0 2011-04-05 - First version
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#
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# Usage: place in /etc/munin/plugins/ (or link it there using ln -s)
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#
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# Parameters understood:
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#
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# config (required)
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# autoconf (optional - used by munin-config)
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#
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# Magic markers - optional - used by installation scripts and
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# munin-config:
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#
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# #%# capabilities=autoconf suggest
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# #%# family=auto
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import os
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import sys
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import warnings # noqa
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#################################
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title = 'Kernel Samepage Merging'
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#################################
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def autoconf():
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if os.path.exists('/sys/kernel/mm/ksm/run'):
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for line in open('/sys/kernel/mm/ksm/run'):
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if line.strip() == '1':
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print('yes')
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break
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else:
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print('no (/sys/kernel/mm/ksm/run does not contain "1")')
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else:
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print('no (/sys/kernel/mm/ksm/run not found)')
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sys.exit(0)
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def suggest():
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print('pages_absolute')
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print('pages_relative')
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print('full_scans')
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sys.exit(0)
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def config():
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if('ksm_pages_absolute' in sys.argv[0]):
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print('graph_category system')
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print('graph_title %s Pages Absolute' % (title))
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print('graph_order pages_unshared pages_volatile pages_shared pages_sharing')
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print('pages_shared.info how many shared pages are being used')
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print('pages_sharing.info how many more sites are sharing them i.e. how much saved')
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print('pages_unshared.info how many pages unique but repeatedly checked for merging')
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print('pages_volatile.info how many pages changing too fast to be placed in a tree')
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print('pages_shared.label pages_shared')
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print('pages_sharing.label pages_sharing')
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print('pages_unshared.label pages_unshared')
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print('pages_volatile.label pages_volatile')
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print('pages_shared.draw AREASTACK')
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print('pages_sharing.draw AREASTACK')
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print('pages_unshared.draw AREASTACK')
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print('pages_volatile.draw AREASTACK')
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elif('ksm_pages_relative' in sys.argv[0]):
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print('graph_category system')
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print('graph_title %s Pages Relative' % (title))
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print('pages_sharing_shared.info ratio of sharing to shared pages')
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print('pages_unshared_sharing.info ratio of unshared to sharing pages')
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print('pages_sharing_shared.label pages_sharing_shared')
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print('pages_unshared_sharing.label pages_unshared_sharing')
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print('pages_sharing_shared.cdef pages_sharing_shared,100,*')
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print('pages_unshared_sharing.cdef pages_unshared_sharing,100,*')
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elif('ksm_full_scans' in sys.argv[0]):
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print('graph_category system')
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print('graph_title %s Full Scans' % (title))
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print('full_scans.info how many times all mergeable areas have been scanned')
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print('full_scans.label full_scans')
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sys.exit(0)
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if len(sys.argv) > 1:
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if sys.argv[1] == 'autoconf':
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autoconf()
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elif sys.argv[1] == 'config':
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config()
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elif sys.argv[1] == 'suggest':
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suggest()
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elif sys.argv[1]:
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print('unknown argument "' + sys.argv[1] + '"')
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sys.exit(1)
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pages_shared = int(open('/sys/kernel/mm/ksm/pages_shared').read())
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pages_sharing = int(open('/sys/kernel/mm/ksm/pages_sharing').read())
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pages_unshared = int(open('/sys/kernel/mm/ksm/pages_unshared').read())
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pages_volatile = int(open('/sys/kernel/mm/ksm/pages_volatile').read())
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full_scans = int(open('/sys/kernel/mm/ksm/full_scans').read())
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if('ksm_pages_absolute' in sys.argv[0]):
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print('pages_shared.value %i' % pages_shared)
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print('pages_sharing.value %i' % pages_sharing)
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print('pages_unshared.value %i' % pages_unshared)
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print('pages_volatile.value %i' % pages_volatile)
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elif('ksm_pages_relative' in sys.argv[0]):
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print('pages_sharing_shared.value %f'
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% (float(pages_sharing) / float(pages_shared) if pages_shared > 0 else 0))
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print('pages_unshared_sharing.value %f'
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% (float(pages_unshared) / float(pages_sharing) if pages_sharing > 0 else 0))
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elif('ksm_full_scans' in sys.argv[0]):
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print('full_scans.value %i' % full_scans)
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