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# Copyright (c) 2016-2017 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.
import io
class CpuSysCores(object):
def __init__(self, connection=""):
self.core_map = {}
self.connection = connection
def _open_cpuinfo(self):
cpuinfo = io.BytesIO()
self.connection.get_file_obj("/proc/cpuinfo", cpuinfo)
lines = cpuinfo.getvalue().decode('utf-8').splitlines()
return lines
def _get_core_details(self, lines):
core_details = []
core_lines = {}
for line in lines:
if line.strip():
name, value = line.split(":", 1)
core_lines[name.strip()] = value.strip()
else:
core_details.append(core_lines)
core_lines = {}
return core_details
def get_core_socket(self):
lines = self.connection.execute("lscpu")[1].split(u'\n')
num_cores = self._get_core_details(lines)
for num in num_cores:
self.core_map["cores_per_socket"] = num["Core(s) per socket"]
self.core_map["thread_per_core"] = num["Thread(s) per core"]
lines = self._open_cpuinfo()
core_details = self._get_core_details(lines)
for core in core_details:
for k, _ in core.items():
if k == "physical id":
if core["physical id"] not in self.core_map:
self.core_map[core['physical id']] = []
self.core_map[core['physical id']].append(
core["processor"])
return self.core_map
def get_cpu_layout(self):
_, stdout, _ = self.connection.execute("lscpu -p")
cpuinfo = {}
cpuinfo['cpuinfo'] = list()
for line in stdout.split("\n"):
if line and line[0] != "#":
cpuinfo['cpuinfo'].append([CpuSysCores._str2int(x) for x in
line.split(",")])
return cpuinfo
def validate_cpu_cfg(self, vnf_cfg=None):
if vnf_cfg is None:
vnf_cfg = {
'lb_config': 'SW',
'lb_count': 1,
'worker_config': '1C/1T',
'worker_threads': 1
}
if self.core_map["thread_per_core"] == 1 and \
vnf_cfg["worker_config"] == "1C/2T":
return -1
if vnf_cfg['lb_config'] == 'SW':
num_cpu = int(vnf_cfg["worker_threads"]) + 5
if int(self.core_map["cores_per_socket"]) < num_cpu:
return -1
return 0
@staticmethod
def _str2int(string):
try:
return int(string)
except ValueError:
return 0
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