yardstick/network_services/helpers/cpu.py

   1 # Copyright (c) 2016-2017 Intel Corporation
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #      http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15
  16 import io
  17
  18
  19 class CpuSysCores(object):
  20
  21     def __init__(self, connection=""):
  22         self.core_map = {}
  23         self.connection = connection
  24
  25     def _open_cpuinfo(self):
  26         cpuinfo = io.BytesIO()
  27         self.connection.get_file_obj("/proc/cpuinfo", cpuinfo)
  28         lines = cpuinfo.getvalue().decode('utf-8').splitlines()
  29         return lines
  30
  31     def _get_core_details(self, lines):
  32         core_details = []
  33         core_lines = {}
  34         for line in lines:
  35             if line.strip():
  36                     name, value = line.split(":", 1)
  37                     core_lines[name.strip()] = value.strip()
  38             else:
  39                     core_details.append(core_lines)
  40                     core_lines = {}
  41
  42         return core_details
  43
  44     def get_core_socket(self):
  45         lines = self.connection.execute("lscpu")[1].split(u'\n')
  46         num_cores = self._get_core_details(lines)
  47         for num in num_cores:
  48             self.core_map["cores_per_socket"] = num["Core(s) per socket"]
  49             self.core_map["thread_per_core"] = num["Thread(s) per core"]
  50
  51         lines = self._open_cpuinfo()
  52         core_details = self._get_core_details(lines)
  53         for core in core_details:
  54             for k, v in core.items():
  55                 if k == "physical id":
  56                     if core["physical id"] not in self.core_map:
  57                         self.core_map[core['physical id']] = []
  58                     self.core_map[core['physical id']].append(
  59                         core["processor"])
  60
  61         return self.core_map
  62
  63     def validate_cpu_cfg(self, vnf_cfg=None):
  64         if vnf_cfg is None:
  65             vnf_cfg = {
  66                 'lb_config': 'SW',
  67                 'lb_count': 1,
  68                 'worker_config': '1C/1T',
  69                 'worker_threads': 1
  70             }
  71         if self.core_map["thread_per_core"] == 1 and \
  72                 vnf_cfg["worker_config"] == "1C/2T":
  73             return -1
  74
  75         if vnf_cfg['lb_config'] == 'SW':
  76             num_cpu = int(vnf_cfg["worker_threads"]) + 5
  77             if int(self.core_map["cores_per_socket"]) < num_cpu:
  78                 return -1
  79
  80         return 0