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     """Execute pktgen between two hosts
  22
  23   Parameters
  24     TBD
  25     """
  26     __scenario_type__ = "Pktgen"
  27
  28     TARGET_SCRIPT = 'pktgen_benchmark.bash'
  29
  30     def __init__(self, context):
  31         self.context = context
  32         self.setup_done = False
  33
  34     def setup(self):
  35         '''scenario setup'''
  36         self.target_script = pkg_resources.resource_filename(
  37             'yardstick.benchmark.scenarios.networking',
  38             Pktgen.TARGET_SCRIPT)
  39         user = self.context.get('user', 'ubuntu')
  40         host = self.context.get('host', None)
  41         target = self.context.get('target', None)
  42         key_filename = self.context.get('key_filename', '~/.ssh/id_rsa')
  43
  44         LOG.debug("user:%s, target:%s", user, target)
  45         self.server = ssh.SSH(user, target, key_filename=key_filename)
  46         self.server.wait(timeout=600)
  47
  48         LOG.debug("user:%s, host:%s", user, host)
  49         self.client = ssh.SSH(user, host, key_filename=key_filename)
  50         self.client.wait(timeout=600)
  51
  52         # copy script to host
  53         self.client.run("cat > ~/pktgen.sh",
  54                         stdin=open(self.target_script, "rb"))
  55
  56         self.setup_done = True
  57
  58     def _iptables_setup(self):
  59         """Setup iptables on server to monitor for received packets"""
  60         cmd = "sudo iptables -F; " \
  61               "sudo iptables -A INPUT -p udp --dport 1000:%s -j DROP" \
  62               % (1000 + self.number_of_ports)
  63         LOG.debug("Executing command: %s", cmd)
  64         status, _, stderr = self.server.execute(cmd)
  65         if status:
  66             raise RuntimeError(stderr)
  67
  68     def _iptables_get_result(self):
  69         """Get packet statistics from server"""
  70         cmd = "sudo iptables -L INPUT -vnx |" \
  71               "awk '/dpts:1000:%s/ {{printf \"%%s\", $1}}'" \
  72               % (1000 + self.number_of_ports)
  73         LOG.debug("Executing command: %s", cmd)
  74         status, stdout, stderr = self.server.execute(cmd)
  75         if status:
  76             raise RuntimeError(stderr)
  77         return int(stdout)
  78
  79     def run(self, args):
  80         """execute the benchmark"""
  81
  82         if not self.setup_done:
  83             self.setup()
  84
  85         ipaddr = args.get("ipaddr", '127.0.0.1')
  86
  87         options = args['options']
  88         packetsize = options.get("packetsize", 60)
  89         self.number_of_ports = options.get("number_of_ports", 10)
  90
  91         self._iptables_setup()
  92
  93         cmd = "sudo bash pktgen.sh %s %s %s" \
  94             % (ipaddr, self.number_of_ports, packetsize)
  95         LOG.debug("Executing command: %s", cmd)
  96         status, stdout, stderr = self.client.execute(cmd)
  97
  98         if status:
  99             raise RuntimeError(stderr)
 100
 101         data = json.loads(stdout)
 102
 103         data['packets_received'] = self._iptables_get_result()
 104
 105         if "sla" in args:
 106             sent = data['packets_sent']
 107             received = data['packets_received']
 108             ppm = 1000000 * (sent - received) / sent
 109             sla_max_ppm = int(args["sla"]["max_ppm"])
 110             assert ppm <= sla_max_ppm, "ppm %d > sla_max_ppm %d" \
 111                 % (ppm, sla_max_ppm)
 112
 113         return data
 114
 115
 116 def _test():
 117     '''internal test function'''
 118     key_filename = pkg_resources.resource_filename('yardstick.resources',
 119                                                    'files/yardstick_key')
 120     ctx = {'host': '172.16.0.137',
 121            'target': '172.16.0.138',
 122            'user': 'ubuntu',
 123            'key_filename': key_filename
 124            }
 125
 126     logger = logging.getLogger('yardstick')
 127     logger.setLevel(logging.DEBUG)
 128
 129     p = Pktgen(ctx)
 130
 131     options = {'packetsize': 120}
 132
 133     args = {'options': options,
 134             'ipaddr': '192.168.111.31'}
 135     result = p.run(args)
 136     print result
 137
 138 if __name__ == '__main__':
 139     _test()