vstf/vstf/agent/equalizer/optimize.py

   1 ##############################################################################
   2 # Copyright (c) 2015 Huawei Technologies Co.,Ltd and others.
   3 #
   4 # All rights reserved. This program and the accompanying materials
   5 # are made available under the terms of the Apache License, Version 2.0
   6 # which accompanies this distribution, and is available at
   7 # http://www.apache.org/licenses/LICENSE-2.0
   8 ##############################################################################
   9
  10 import commands
  11 import re
  12
  13
  14 # import pdb
  15 # pdb.set_trace()
  16
  17 class Optimize(object):
  18     def __init__(self):
  19         pass
  20
  21     def bind_cpu(self, cpu_range, thread):
  22         flag, num = commands.getstatusoutput('taskset -pc %s %s' % (cpu_range, thread))
  23         return flag
  24
  25     def catch_thread_info(self):
  26         thread_info = {'fwd_vhost': None, 'src_recv_irq': None, 'dst_send_irq': None}
  27         # top -H get the usage info
  28         flag, threads_usages = commands.getstatusoutput('top -bH -n1 -c -w 2000')
  29         line_array = threads_usages.split('\n')
  30         # get highest vhost line
  31         for line in line_array:
  32             if re.search('vhost-', line) and self._check_thread_usage(line):
  33                 thread_info['fwd_vhost'] = line.split()[0]
  34                 break
  35         # get highest irq thread as src_recv_irq thread
  36         for line in line_array:
  37             if re.search('irq/', line) and self._check_thread_usage(line):
  38                 thread_info['src_recv_irq'] = line.split()[0]
  39                 line_array.remove(line)
  40                 break
  41         # get the second highest irq thread as dst_send_irq
  42         for line in line_array:
  43             if re.search('irq/', line) and self._check_thread_usage(line):
  44                 thread_info['dst_send_irq'] = line.split()[0]
  45                 break
  46         # check the data valid
  47
  48         for key in thread_info.keys():
  49             if thread_info[key] is None:
  50                 return False, str(thread_info)
  51         return True, str(thread_info)
  52
  53     def _check_thread_usage(self, line):
  54         try:
  55             usage = line.split()[8]
  56             if float(usage) >= 3.0:
  57                 return True
  58             else:
  59                 print("[ERROR]The highest thread %s is less than 0.05" % usage)
  60                 return False
  61         except:
  62             print("[ERROR]The thread usage get failed.")