1 # Copyright 2016 Cisco Systems, Inc. All rights reserved.
3 # Licensed under the Apache License, Version 2.0 (the "License"); you may
4 # not use this file except in compliance with the License. You may obtain
5 # a copy of the License at
7 # http://www.apache.org/licenses/LICENSE-2.0
9 # Unless required by applicable law or agreed to in writing, software
10 # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 # License for the specific language governing permissions and limitations
17 from functools import wraps
26 class TimeoutError(Exception):
30 def timeout(seconds=10, error_message=os.strerror(errno.ETIME)):
32 def _handle_timeout(signum, frame):
33 raise TimeoutError(error_message)
35 def wrapper(*args, **kwargs):
36 signal.signal(signal.SIGALRM, _handle_timeout)
39 result = func(*args, **kwargs)
44 return wraps(func)(wrapper)
49 def save_json_result(result, json_file, std_json_path, service_chain, service_chain_count,
50 flow_count, frame_sizes):
51 """Save results in json format file."""
54 filepaths.append(json_file)
56 name_parts = [service_chain, str(service_chain_count), str(flow_count)] + list(frame_sizes)
57 filename = '-'.join(name_parts) + '.json'
58 filepaths.append(os.path.join(std_json_path, filename))
61 for file_path in filepaths:
62 LOG.info('Saving results in json file: ' + file_path + "...")
63 with open(file_path, 'w') as jfp:
68 separators=(',', ': '),
69 default=lambda obj: obj.to_json())
72 def byteify(data, ignore_dicts=False):
73 # if this is a unicode string, return its string representation
74 if isinstance(data, unicode):
75 return data.encode('utf-8')
76 # if this is a list of values, return list of byteified values
77 if isinstance(data, list):
78 return [byteify(item, ignore_dicts=ignore_dicts) for item in data]
79 # if this is a dictionary, return dictionary of byteified keys and values
80 # but only if we haven't already byteified it
81 if isinstance(data, dict) and not ignore_dicts:
82 return {byteify(key, ignore_dicts=ignore_dicts): byteify(value, ignore_dicts=ignore_dicts)
83 for key, value in data.iteritems()}
84 # if it's anything else, return it in its original form
88 def dict_to_json_dict(record):
89 return json.loads(json.dumps(record, default=lambda obj: obj.to_json()))
92 def get_intel_pci(nic_ports):
93 """Returns the first two PCI addresses of sorted PCI list for Intel NIC (i40e, ixgbe)"""
95 regex = r'{hx}{{4}}:({hx}{{2}}:{hx}{{2}}\.{hx}{{1}}).*(drv={driver}|.*unused=.*{driver})'
98 trex_base_dir = '/opt/trex'
99 contents = os.listdir(trex_base_dir)
100 trex_dir = os.path.join(trex_base_dir, contents[0])
101 process = subprocess.Popen(['python', 'dpdk_setup_ports.py', '-s'],
103 stdout=subprocess.PIPE,
104 stderr=subprocess.PIPE)
105 devices, _ = process.communicate()
109 for driver in ['i40e', 'ixgbe']:
110 matches = re.findall(regex.format(hx=hx, driver=driver), devices)
112 pcis = map(lambda x: x[0], matches)
116 return [pcis[port_index] for port_index in nic_ports]
128 def parse_flow_count(flow_count):
129 flow_count = str(flow_count)
130 input_fc = flow_count
132 if flow_count[-1].upper() in multiplier_map:
133 multiplier = multiplier_map[flow_count[-1].upper()]
134 flow_count = flow_count[:-1]
137 flow_count = int(flow_count)
139 raise Exception("Unknown flow count format '{}'".format(input_fc))
141 return flow_count * multiplier
144 class RunLock(object):
146 Attempts to lock file and run current instance of NFVbench as the first,
147 otherwise raises exception.
150 def __init__(self, path='/tmp/nfvbench.lock'):
156 self._fd = os.open(self._path, os.O_CREAT)
157 fcntl.flock(self._fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
158 except (OSError, IOError):
159 raise Exception('Other NFVbench process is running. Please wait')
161 def __exit__(self, *args):
162 fcntl.flock(self._fd, fcntl.LOCK_UN)
166 # Try to remove the lock file, but don't try too hard because it is unnecessary.
168 os.unlink(self._path)
169 except (OSError, IOError):