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# -*- coding: utf-8 -*-
#
# Copyright 2009 - 2013 Clark Williams <williams@redhat.com>
# Copyright 2012 - 2013 David Sommerseth <davids@redhat.com>
#
# 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 2 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# For the avoidance of doubt the "preferred form" of this code is one which
# is in an open unpatent encumbered format. Where cryptographic key signing
# forms part of the process of creating an executable the information
# including keys needed to generate an equivalently functional executable
# are deemed to be part of the source code.
#
import libxml2
from glob import glob
class MemoryInfo(object):
numa_nodes = None
def __init__(self):
pass
def mem_get_numa_nodes(self):
if self.numa_nodes is None:
self.numa_nodes = len(glob('/sys/devices/system/node/node*'))
return self.numa_nodes
def mem_get_size(self):
'''find out how much memory is installed'''
f = open('/proc/meminfo')
rawsize = 0
for l in f:
if l.startswith('MemTotal:'):
parts = l.split()
if parts[2].lower() != 'kb':
raise RuntimeError, "Units changed from kB! (%s)" % parts[2]
rawsize = int(parts[1])
f.close()
break
if rawsize == 0:
raise RuntimeError, "can't find memtotal in /proc/meminfo!"
# Get a more readable result
# Note that this depends on /proc/meminfo starting in Kb
units = ('KB', 'MB','GB','TB')
size = rawsize
for unit in units:
if size < (1024*1024):
break
size = float(size) / 1024
return (size, unit)
def MakeReport(self):
rep_n = libxml2.newNode("Memory")
numa_n = libxml2.newNode("numa_nodes")
numa_n.addContent(str(self.mem_get_numa_nodes()))
rep_n.addChild(numa_n)
memsize = self.mem_get_size()
mem_n = libxml2.newNode("memory_size")
mem_n.addContent("%.3f" % memsize[0])
mem_n.newProp("unit", memsize[1])
rep_n.addChild(mem_n)
return rep_n
def unit_test(rootdir):
import sys
try:
mi = MemoryInfo()
print "Numa nodes: %i" % mi.mem_get_numa_nodes()
print "Memory: %i %s" % mi.mem_get_size()
except Exception, e:
import traceback
traceback.print_exc(file=sys.stdout)
print "** EXCEPTION %s", str(e)
return 1
if __name__ == '__main__':
unit_test(None)
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