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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.
from __future__ import print_function
"""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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