def __init__(self, config, host, port, output_dir):
with open(config, 'r') as f:
LOGGER.info('Loading config')
self.config = ExperimentConfig(
toml.load(f, _dict=RecursiveNestedDict))
LOGGER.warning('Loaded config from %s', config)
LOGGER.warning('Output directory: %s', output_dir)
self.clients = list()
self.host = host
self.port = port
self.tcpdump_proc = None
self.output_dir = output_dir
self.backend_mgr = BackendManager(self.config)
if self.config.gen_load:
self.load_mgr = CPULoadManager(self.config)
else:
self.load_mgr = NullCPULoadManager()
self.ntp_client = ntplib.NTPClient()
self.offset = 0
LOGGER.info('Experiment ID: %s', self.config.name)
LOGGER.info('Clients: %d', self.config.clients)
LOGGER.info('Runs: %d', self.config.runs)
def Add(self, contact_data): """Adds a contact to the list, assigning it to the default backend and saving it @param contact_data List of fields; format is [Key:Value, Key:Value, ...] @return URI of the newly created d-bus contact object""" # We use the default backend for now backend = BackendManager.get_default_backend(_DOMAIN_NAME) result = "" if not PIMB_CAN_ADD_ENTRY in backend.properties: raise InvalidBackendError() try: contact_id = backend.add_contact(contact_data) except AttributeError: raise InvalidBackendError() contact = self._contacts[contact_id] result = contact['URI'] # As we just added a new contact, we check it against all queries to see if it matches self.query_manager.check_new_contact(contact_id) return result
syslog(LOG_WARNING, "%s: Could not request SIM messagebook from ogsmd, scheduling retry (%s)" % (self.name, e)) return True return False def handle_incoming_message(self, message_id): self.gsm_sim_iface.RetrieveMessage( message_id, reply_handler=self.process_incoming_entry # TODO We ignore errors for now ) def install_signal_handlers(self): """Hooks to some d-bus signals that are of interest to us""" bus = SystemBus() bus.add_signal_receiver( self.handle_incoming_message, 'IncomingMessage', 'org.freesmartphone.GSM.SIM' ) ### Initalization ### BackendManager.register_backend(SIMMessageBackendFSO())
def save_entries_to_file(self): """Saves all entries to disk""" file = open(_CSV_FILE_NAME, 'w') for entry in self._domain_handlers['Contacts'].enumerate_contacts(self): line = "" for field in entry: (field_name, field_data) = field line += field_name + '=' + field_data + ',' file.write(line[:-1] + "\n") file.close() def add_contact(self, contact_data): contact_id = self._domain_handlers['Contacts'].register_contact(self, contact_data) # TODO Delayed writing to prevent performance issues when adding lots of contacts self.save_entries_to_file() return contact_id ### Initalization ### BackendManager.register_backend(CSVContactBackend())
class Experiment:
def __init__(self, config, host, port, output_dir):
with open(config, 'r') as f:
LOGGER.info('Loading config')
self.config = ExperimentConfig(
toml.load(f, _dict=RecursiveNestedDict))
LOGGER.warning('Loaded config from %s', config)
LOGGER.warning('Output directory: %s', output_dir)
self.clients = list()
self.host = host
self.port = port
self.tcpdump_proc = None
self.output_dir = output_dir
self.backend_mgr = BackendManager(self.config)
if self.config.gen_load:
self.load_mgr = CPULoadManager(self.config)
else:
self.load_mgr = NullCPULoadManager()
self.ntp_client = ntplib.NTPClient()
self.offset = 0
LOGGER.info('Experiment ID: %s', self.config.name)
LOGGER.info('Clients: %d', self.config.clients)
LOGGER.info('Runs: %d', self.config.runs)
def shutdown(self, e=None):
LOGGER.warning('Shut down!')
if e:
LOGGER.critical(e)
try:
for client in self.clients:
client.shutdown()
except Exception as e:
LOGGER.error('Something went wrong while shutting down clients')
LOGGER.error(e)
try:
if self.tcpdump_proc:
self.tcpdump_proc.send_signal(signal.SIGINT)
except Exception as e:
LOGGER.error('Something went wrong while shutting down TCPDUMP')
LOGGER.error(e)
try:
if self.backend_mgr:
self.backend_mgr.shutdown()
except Exception as e:
LOGGER.error(
'Something went wrong while shutting down Docker containers')
LOGGER.error(e)
def _init_tcpdump(self, run_path: str):
LOGGER.info('Initializing TCP dump...')
LOGGER.info('TCPdump directory: {}'.format(run_path))
port_cmds = list()
for port_cfg in self.config.port_configs:
cmds = [
'port {}'.format(port_cfg.video),
'port {}'.format(port_cfg.result),
'port {}'.format(port_cfg.control),
]
port_cmds.append(' or '.join(cmds))
port_cmds = [' or '.join(port_cmds)]
tcpdump = shlex.split(
' '.join(constants.TCPDUMP_CMD_PREFIX + port_cmds +
constants.TCPDUMP_CMD_SUFFIX))
self.tcpdump_proc = subprocess.Popen(tcpdump, cwd=run_path)
if self.tcpdump_proc.poll():
raise RuntimeError('Could not start TCPDUMP!')
# noinspection PyProtectedMember
def _gen_config_for_client(self, client_index):
c = dict()
c['experiment_id'] = self.config.name
c['client_id'] = client_index
c['steps'] = len(self.config.trace_steps)
c['ports'] = self.config.port_configs[client_index]._asdict()
c['ntp_server'] = self.config.ntp_servers[0]
# TODO change in the future (to work with more than one server)
c['fps'] = self.config.trace_fps
c['rewind_seconds'] = self.config.rewind_seconds
c['max_replays'] = self.config.max_replays
return c
def _pollNTPServer(self):
LOGGER.info('Getting NTP offset')
sync_cnt = 0
cum_offset = 0
while sync_cnt < constants.DEFAULT_NTP_POLL_COUNT:
try:
res = self.ntp_client.request(self.config.ntp_servers[0],
version=4)
cum_offset += res.offset
sync_cnt += 1
except ntplib.NTPException:
continue
self.offset = (cum_offset * 1000.0) / sync_cnt
# convert to milliseconds
LOGGER.info('Got NTP offset from %s', self.config.ntp_servers[0])
LOGGER.info('Offset: %f ms', self.offset)
def __execute_run(self, run_index):
LOGGER.info('Executing run %d out of %d', run_index + 1,
self.config.runs)
run_path = self.output_dir + f'/run_{run_index + 1}/'
if os.path.exists(run_path) and not os.path.isdir(run_path):
raise RuntimeError(f'Output path {run_path} already '
'exists and is not a directory!')
elif os.path.isdir(run_path):
pass
else:
os.mkdir(run_path)
# sync NTP
self._pollNTPServer()
LOGGER.info('Trigger client NTP sync')
for client in self.clients:
client.ntp_sync()
# self._init_tcpdump(run_path)
# LOGGER.info('TCPdump warmup...')
# time.sleep(5)
# make sure all clients are done syncing NTP before starting the
# experiment
for client in self.clients:
client.wait_for_tasks()
# All clients are ready, now let's run the experiment!
shuffle(self.clients) # shuffle clients before each run
# Randomly offset client experiment start to avoid weird
# synchronous effects on the processing times...
start_times = np.random.uniform(0, constants.DEFAULT_START_WINDOW,
len(self.clients))
# start artificial CPU load
self.load_mgr.start_cpu_load()
LOGGER.info('Execute experiment!')
LOGGER.info('Starting resource monitor...')
monitor = ResourceMonitor(self.offset)
monitor.start()
start_timestamp = time.time() * 1000.0
# finally, actually trigger the experiment on the clients...
# asynchronously, of course
for client, init_offset in zip(self.clients, start_times):
client.execute_experiment(init_offset)
# wait for the experiment to finish
for client in self.clients:
client.wait_for_tasks()
end_timestamp = time.time() * 1000.0
LOGGER.info('Shut down monitor.')
system_stats = monitor.shutdown()
# shut down CPU load generator
self.load_mgr.shutdown()
time.sleep(1)
# LOGGER.info('Terminate TCPDUMP')
# self.tcpdump_proc.send_signal(signal.SIGINT)
# self.tcpdump_proc.wait()
LOGGER.info('Get stats from clients!')
for client in self.clients:
client.fetch_stats() # asynchronously triggers fetching stats
# store this runs' system stats
with open(run_path + constants.SYSTEM_STATS, 'w') as f:
fieldnames = ['cpu_load', 'mem_avail', 'timestamp']
writer = csv.DictWriter(f, fieldnames=fieldnames)
writer.writeheader()
writer.writerows(system_stats)
# store the client stats
stats = [c.get_stats() for c in self.clients]
for stat_coll in stats:
client_index = stat_coll['client_id']
with open(run_path + constants.CLIENT_STATS.format(client_index),
'w') as f:
json.dump(stat_coll, f)
# save server stats:
with open(run_path + constants.SERVER_STATS, 'w') as f:
json.dump(
{
'server_offset': self.offset,
'run_start': start_timestamp + self.offset,
'run_end': end_timestamp + self.offset
}, f)
def execute(self):
server_socket = None
error = None
try:
# first start docker instances
self.backend_mgr.spawn_backends()
with socket(AF_INET, SOCK_STREAM) as server_socket:
server_socket.bind((self.host, self.port))
server_socket.listen(self.config.clients)
server_socket.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
LOGGER.info('Listening on %s:%d', self.host, self.port)
# accept N clients for the experiment
LOGGER.info('Waiting for %d clients to connect...',
self.config.clients)
signal.signal(signal.SIGINT, signal_handler)
signal.signal(signal.SIGTERM, signal_handler)
# wait for all clients to connect
for i in range(self.config.clients):
conn, addr = server_socket.accept()
set_keepalive_linux(conn, max_fails=100) # 5 minutes
client = AsyncClient(conn, addr,
self._gen_config_for_client(i))
self.clients.append(client)
LOGGER.info('{} out of {} clients connected: {}:{}'.format(
i + 1, self.config.clients, *addr))
# send config
client.send_config()
# wait for clients to finish sending configs
for c in self.clients:
c.wait_for_tasks()
# send traces, two clients at the time
LOGGER.info('Pushing step files to clients...')
# grouper is a generator, so wrap it in a list
chunks = list(grouper(self.clients, 2, fillvalue=NullClient()))
# use list comprehensions to avoid laziness (map())
step_data = [
open(p, 'rb').read() for p in self.config.trace_steps
]
step_chksums = [hashlib.md5(d).hexdigest() for d in step_data]
steps = zip(itertools.count(start=1), step_chksums, step_data)
for chunk, step in itertools.product(chunks, steps):
for c in chunk:
c.send_step(*step)
for c in chunk:
c.wait_for_tasks()
# execute runs!
for r in range(self.config.runs):
self.__execute_run(r)
except ShutdownException:
pass
except Exception as e:
error = e
finally:
try:
if server_socket:
# server_socket.shutdown(SHUT_RDWR)
server_socket.close()
except Exception as e:
LOGGER.critical('Error closing server socket.')
LOGGER.critical(e)
self.shutdown(e=error)
#----------------------------------------------------------------------------#
# Test backend manager
#----------------------------------------------------------------------------#
from backend_manager import BackendManager
class DummyBackend(object):
name = 'DummyBackend'
status = 'Happy'
def get_supported_domains(self): return ('DummyDomain')
db = DummyBackend()
# Try adding a dummy backend and make sure it gets listed
bm = BackendManager('')
BackendManager.register_backend(db)
if bm.GetName('/0') == db.name:
print "Backend registration OK"
else:
print "Backend registration FAILED"
# See if number of backends is correct
if bm.GetEntryCount() == 1:
print "Backend count OK"
else:
print "Backend count FAILED"
if bm.GetSupportedPIMDomains('/0') == db.get_supported_domains():
print "Backend domain support check OK"
else:
