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 class CpuSysCores(object):
  17
  18     def __init__(self, connection=""):
  19         self.core_map = {}
  20         self.connection = connection
  21
  22     def _open_cpuinfo(self):
  23         lines = []
  24         lines = self.connection.execute("cat /proc/cpuinfo")[1].split(u'\n')
  25         return lines
  26
  27     def _get_core_details(self, lines):
  28         core_details = []
  29         core_lines = {}
  30         for line in lines:
  31             if line.strip():
  32                     name, value = line.split(":", 1)
  33                     core_lines[name.strip()] = value.strip()
  34             else:
  35                     core_details.append(core_lines)
  36                     core_lines = {}
  37
  38         return core_details
  39
  40     def get_core_socket(self):
  41         lines = self.connection.execute("lscpu")[1].split(u'\n')
  42         num_cores = self._get_core_details(lines)
  43         for num in num_cores:
  44             self.core_map["cores_per_socket"] = num["Core(s) per socket"]
  45             self.core_map["thread_per_core"] = num["Thread(s) per core"]
  46
  47         lines = self._open_cpuinfo()
  48         core_details = self._get_core_details(lines)
  49         for core in core_details:
  50             for k, v in core.items():
  51                 if k == "physical id":
  52                     if core["physical id"] not in self.core_map:
  53                         self.core_map[core['physical id']] = []
  54                     self.core_map[core['physical id']].append(
  55                         core["processor"])
  56
  57         return self.core_map
  58
  59     def validate_cpu_cfg(self, vnf_cfg=None):
  60         if vnf_cfg is None:
  61             vnf_cfg = {
  62                 'lb_config': 'SW',
  63                 'lb_count': 1,
  64                 'worker_config': '1C/1T',
  65                 'worker_threads': 1
  66             }
  67         if self.core_map["thread_per_core"] == 1 and \
  68                 vnf_cfg["worker_config"] == "1C/2T":
  69             return -1
  70
  71         if vnf_cfg['lb_config'] == 'SW':
  72             num_cpu = int(vnf_cfg["worker_threads"]) + 5
  73             if int(self.core_map["cores_per_socket"]) < num_cpu:
  74                 return -1
  75
  76         return 0