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# Copyright (c) 2016 Cisco and/or its affiliates.
# 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.
"""VPP Huge Page Utilities"""
import re
from vpplib.VPPUtil import VPPUtil
# VPP Huge page File
DEFAULT_VPP_HUGE_PAGE_CONFIG_FILENAME = "/etc/vpp/80-vpp.conf"
VPP_HUGEPAGE_CONFIG = """
vm.nr_hugepages={nr_hugepages}
vm.max_map_count={max_map_count}
vm.hugetlb_shm_group=0
kernel.shmmax={shmmax}
"""
class VppHugePageUtil(object):
"""
Huge Page Utilities
"""
def hugepages_dryrun_apply(self):
"""
Apply the huge page configuration
"""
node = self._node
hugepages = node['hugepages']
vpp_hugepage_config = VPP_HUGEPAGE_CONFIG.format(
nr_hugepages=hugepages['total'],
max_map_count=hugepages['max_map_count'],
shmmax=hugepages['shmax'])
rootdir = node['rootdir']
filename = rootdir + node['hugepages']['hugepage_config_file']
cmd = 'echo "{0}" | sudo tee {1}'.\
format(vpp_hugepage_config, filename)
(ret, stdout, stderr) = VPPUtil.exec_command(cmd)
if ret != 0:
raise RuntimeError('{} failed on node {} {} {}'.
format(cmd, node['host'],
stdout, stderr))
def get_actual_huge_pages(self):
"""
Get the current huge page configuration
:returns the hugepage total, hugepage free, hugepage size,
total memory, and total memory free
:rtype: tuple
"""
# Get the memory information using /proc/meminfo
cmd = 'sudo cat /proc/meminfo'
(ret, stdout, stderr) = VPPUtil.exec_command(cmd)
if ret != 0:
raise RuntimeError(
'{} failed on node {} {} {}'.format(
cmd, self._node['host'],
stdout, stderr))
total = re.findall(r'HugePages_Total:\s+\w+', stdout)
free = re.findall(r'HugePages_Free:\s+\w+', stdout)
size = re.findall(r'Hugepagesize:\s+\w+\s+\w+', stdout)
memtotal = re.findall(r'MemTotal:\s+\w+\s+\w+', stdout)
memfree = re.findall(r'MemFree:\s+\w+\s+\w+', stdout)
total = total[0].split(':')[1].lstrip()
free = free[0].split(':')[1].lstrip()
size = size[0].split(':')[1].lstrip()
memtotal = memtotal[0].split(':')[1].lstrip()
memfree = memfree[0].split(':')[1].lstrip()
return total, free, size, memtotal, memfree
def show_huge_pages(self):
"""
Print the current huge page configuration
"""
node = self._node
hugepages = node['hugepages']
print " {:30}: {}".format("Total System Memory",
hugepages['memtotal'])
print " {:30}: {}".format("Total Free Memory",
hugepages['memfree'])
print " {:30}: {}".format("Actual Huge Page Total",
hugepages['actual_total'])
print " {:30}: {}".format("Configured Huge Page Total",
hugepages['total'])
print " {:30}: {}".format("Huge Pages Free", hugepages['free'])
print " {:30}: {}".format("Huge Page Size", hugepages['size'])
def get_huge_page_config(self):
"""
Returns the huge page config.
:returns: The map max count and shmmax
"""
total = self._node['hugepages']['total']
max_map_count = int(total) * 2 + 1024
shmmax = int(total) * 2 * 1024 * 1024
return max_map_count, shmmax
def __init__(self, node):
self._node = node
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