1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
# Copyright 2015-2016 Intel Corporation.
#
# 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.
"""Automation of hugepages management
"""
import os
import re
import subprocess
import logging
import locale
from tools import tasks
from conf import settings
_LOGGER = logging.getLogger(__name__)
#
# hugepage management
#
def is_hugepage_available():
"""Check if hugepages are available on the system.
"""
hugepage_re = re.compile(r'^HugePages_Free:\s+(?P<num_hp>\d+)$')
# read in meminfo
with open('/proc/meminfo') as mem_file:
mem_info = mem_file.readlines()
# first check if module is loaded
for line in mem_info:
result = hugepage_re.match(line)
if not result:
continue
num_huge = result.group('num_hp')
if not num_huge:
_LOGGER.info('No free hugepages.')
else:
_LOGGER.info('Found \'%s\' free hugepage(s).', num_huge)
return True
return False
def is_hugepage_mounted():
"""Check if hugepages are mounted.
"""
output = subprocess.check_output(['mount'], shell=True)
my_encoding = locale.getdefaultlocale()[1]
for line in output.decode(my_encoding).split('\n'):
if 'hugetlbfs' in line:
return True
return False
def mount_hugepages():
"""Ensure hugepages are mounted.
"""
if not is_hugepage_available():
return
if is_hugepage_mounted():
return
if not os.path.exists(settings.getValue('HUGEPAGE_DIR')):
os.makedirs(settings.getValue('HUGEPAGE_DIR'))
try:
tasks.run_task(['sudo', 'mount', '-t', 'hugetlbfs', 'nodev',
settings.getValue('HUGEPAGE_DIR')],
_LOGGER, 'Mounting hugepages...', True)
except subprocess.CalledProcessError:
_LOGGER.error('Unable to mount hugepages.')
def umount_hugepages():
"""Ensure hugepages are unmounted.
"""
if not is_hugepage_mounted():
return
try:
tasks.run_task(['sudo', 'umount', settings.getValue('HUGEPAGE_DIR')],
_LOGGER, 'Unmounting hugepages...', True)
except subprocess.CalledProcessError:
_LOGGER.error('Unable to umount hugepages.')
|
