def __init__(self, iface, log_file, cw_init):
super(TunerCollisionRate, self).__init__(iface, log_file)
self.cr_observer = CollisionRateObserver(iface)
self.ao = AirtimeObserver(iface)
self.set_cw(cw_init)
self.cw_prev = cw_init
def __init__(self, iface, log_file, cw_init, beta, k):
super(TunerNew, self).__init__(iface, log_file)
self.cr_observer = CollisionRateObserver(iface)
self.k = k
self.beta = beta
self.cw_prev = cw_init
self.smooth = None
self.set_cw(cw_init)
def __init__(self, iface, log_file):
# TODO: implement iface --> phy translation
assert (iface == 'wlan0')
phy = 'phy0'
self.cr_observer = CollisionRateObserver(iface)
self.txq_params_fname = '/sys/kernel/debug/ieee80211/'
self.txq_params_fname += phy
self.txq_params_fname += '/ath9k/txq_params'
self.log_file = log_file
class TunerOld(TunerBase):
def __init__(self, iface, log_file, cw_init):
super(TunerOld, self).__init__(iface, log_file)
self.cmd = [
'cat', '/sys/kernel/debug/ieee80211/phy0/statistics/'
'dot11RTSSuccessCount'
]
self.cr_observer = CollisionRateObserver(iface)
self.observer = ChannelObserver()
self.n = int(subprocess.check_output(self.cmd))
self.n_old = None
self.cw_prev = cw_init
def update_cw(self, alloc, airtime):
self.observer.update()
busy = self.observer.surveysays('busy')
self.n_old = self.n
self.n = int(subprocess.check_output(self.cmd))
n = self.n - self.n_old
n_alloc = n * alloc if n * alloc != 0 else 1
cw = int((2 / 9e-3) * (airtime * ((1 - alloc) / (n_alloc)) * busy))
cw = 0 if cw < 0 else cw
cw = 1023 if cw > 1023 else cw
self.set_cw(cw)
self.log(alloc, airtime, self.cw_prev, cw,
self.cr_observer.collision_rate())
self.cw_prev = cw
class TunerNew(TunerBase):
def __init__(self, iface, log_file, cw_init, beta, k):
super(TunerNew, self).__init__(iface, log_file)
self.cr_observer = CollisionRateObserver(iface)
self.k = k
self.beta = beta
self.cw_prev = cw_init
self.smooth = None
self.set_cw(cw_init)
def update_cw(self, alloc, airtime):
if self.smooth is None:
self.smooth = airtime
else:
self.smooth = self.beta * airtime + (1.0 - self.beta) * self.smooth
cw = int((self.smooth - alloc) * self.k) + self.cw_prev
cw = 0 if cw < 0 else cw
cw = 1023 if cw > 1023 else cw
self.set_cw(cw)
self.log(alloc, airtime, self.cw_prev, cw,
self.cr_observer.collision_rate())
self.cw_prev = cw
class TunerBase(object):
def __init__(self, iface, log_file):
# TODO: implement iface --> phy translation
assert (iface == 'wlan0')
phy = 'phy0'
self.cr_observer = CollisionRateObserver(iface)
self.txq_params_fname = '/sys/kernel/debug/ieee80211/'
self.txq_params_fname += phy
self.txq_params_fname += '/ath9k/txq_params'
self.log_file = log_file
def set_cw(self, cw):
qumId = 1 #BE
aifs = 2
cwmin = int(cw)
cwmax = int(cw)
burst = 0
txq_params_msg = '{} {} {} {} {}'.format(qumId, aifs, cwmin, cwmax,
burst)
f_cw = open(self.txq_params_fname, 'w')
f_cw.write(txq_params_msg)
f_cw.close()
def log(self, alloc, airtime, cw_prev, cw, cr):
self.log_file.write('{:.5f},{:.5f},{:.5f},{},{},{:.5f}\n'.format(
time.time(), alloc, airtime, cw_prev, cw, cr))
self.log_file.flush()
def update_cw(self, alloc, airtime):
self.log(alloc, airtime, -1, -1, self.cr_observer.collision_rate())
class TunerCollisionRate(TunerBase):
def __init__(self, iface, log_file, cw_init):
super(TunerCollisionRate, self).__init__(iface, log_file)
self.cr_observer = CollisionRateObserver(iface)
self.ao = AirtimeObserver(iface)
self.set_cw(cw_init)
self.cw_prev = cw_init
def update_cw(self):
coll_rate = self.cr_observer.collision_rate()
airtime = self.ao.airtime()
if coll_rate < .1:
cw = self.cw_prev / 2
elif coll_rate > .2:
cw = self.cw_prev * 2
else:
cw = self.cw_prev
cw = 2 if cw < 2 else cw
cw = 1023 if cw > 1023 else cw
cw = int(cw)
self.set_cw(cw)
self.log(-1, airtime, self.cw_prev, cw, coll_rate)
self.cw_prev = cw