yardstick/benchmark/scenarios/networking/pktgen.py

   1 ##############################################################################
   2 # Copyright (c) 2015 Ericsson AB 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 import pkg_resources
  10 import logging
  11 import json
  12
  13 import yardstick.ssh as ssh
  14 from yardstick.benchmark.scenarios import base
  15
  16 LOG = logging.getLogger(__name__)
  17 LOG.setLevel(logging.DEBUG)
  18
  19
  20 class Pktgen(base.Scenario):
  21     """Executes a pktgen benchmark between two hosts"""
  22     __scenario_type__ = "Pktgen"
  23
  24     TARGET_SCRIPT = 'pktgen_benchmark.bash'
  25
  26     def __init__(self, context):
  27         self.context = context
  28         self.setup_done = False
  29
  30     def setup(self):
  31         '''scenario setup'''
  32         self.target_script = pkg_resources.resource_filename(
  33             'yardstick.benchmark.scenarios.networking',
  34             Pktgen.TARGET_SCRIPT)
  35         user = self.context.get('user', 'ubuntu')
  36         host = self.context.get('host', None)
  37         target = self.context.get('target', None)
  38         key_filename = self.context.get('key_filename', '~/.ssh/id_rsa')
  39
  40         LOG.debug("user:%s, target:%s", user, target)
  41         self.server = ssh.SSH(user, target, key_filename=key_filename)
  42         self.server.wait(timeout=600)
  43
  44         LOG.debug("user:%s, host:%s", user, host)
  45         self.client = ssh.SSH(user, host, key_filename=key_filename)
  46         self.client.wait(timeout=600)
  47
  48         # copy script to host
  49         self.client.run("cat > ~/pktgen.sh",
  50                         stdin=open(self.target_script, "rb"))
  51
  52         self.setup_done = True
  53
  54     def _iptables_setup(self):
  55         """Setup iptables on server to monitor for received packets"""
  56         cmd = "sudo iptables -F; " \
  57               "sudo iptables -A INPUT -p udp --dport 1000:%s -j DROP" \
  58               % (1000 + self.number_of_ports)
  59         LOG.debug("Executing command: %s", cmd)
  60         status, _, stderr = self.server.execute(cmd)
  61         if status:
  62             raise RuntimeError(stderr)
  63
  64     def _iptables_get_result(self):
  65         """Get packet statistics from server"""
  66         cmd = "sudo iptables -L INPUT -vnx |" \
  67               "awk '/dpts:1000:%s/ {{printf \"%%s\", $1}}'" \
  68               % (1000 + self.number_of_ports)
  69         LOG.debug("Executing command: %s", cmd)
  70         status, stdout, stderr = self.server.execute(cmd)
  71         if status:
  72             raise RuntimeError(stderr)
  73         return int(stdout)
  74
  75     def run(self, args):
  76         """execute the benchmark"""
  77
  78         if not self.setup_done:
  79             self.setup()
  80
  81         ipaddr = args.get("ipaddr", '127.0.0.1')
  82
  83         options = args['options']
  84         packetsize = options.get("packetsize", 60)
  85         self.number_of_ports = options.get("number_of_ports", 10)
  86
  87         self._iptables_setup()
  88
  89         cmd = "sudo bash pktgen.sh %s %s %s" \
  90             % (ipaddr, self.number_of_ports, packetsize)
  91         LOG.debug("Executing command: %s", cmd)
  92         status, stdout, stderr = self.client.execute(cmd)
  93
  94         if status:
  95             raise RuntimeError(stderr)
  96
  97         data = json.loads(stdout)
  98
  99         data['packets_received'] = self._iptables_get_result()
 100
 101         if "sla" in args:
 102             sent = data['packets_sent']
 103             received = data['packets_received']
 104             ppm = 1000000 * (sent - received) / sent
 105             sla_max_ppm = int(args["sla"]["max_ppm"])
 106             assert ppm <= sla_max_ppm, "ppm %d > sla_max_ppm %d" \
 107                 % (ppm, sla_max_ppm)
 108
 109         return data
 110
 111
 112 def _test():
 113     '''internal test function'''
 114     key_filename = pkg_resources.resource_filename('yardstick.resources',
 115                                                    'files/yardstick_key')
 116     ctx = {'host': '172.16.0.137',
 117            'target': '172.16.0.138',
 118            'user': 'ubuntu',
 119            'key_filename': key_filename
 120            }
 121
 122     logger = logging.getLogger('yardstick')
 123     logger.setLevel(logging.DEBUG)
 124
 125     p = Pktgen(ctx)
 126
 127     options = {'packetsize': 120}
 128
 129     args = {'options': options,
 130             'ipaddr': '192.168.111.31'}
 131     result = p.run(args)
 132     print result
 133
 134 if __name__ == '__main__':
 135     _test()