def set_cpu_affinity(n, process_ids, actual=not Conf.TESTING):
"""
Sets the cpu affinity for the supplied processes.
Requires the optional psutil module.
:param int n: affinity
:param list process_ids: a list of pids
:param bool actual: Test workaround for Travis not supporting cpu affinity
"""
# check if we have the psutil module
if not psutil:
logger.warning('Skipping cpu affinity because psutil was not found.')
return
# check if the platform supports cpu_affinity
if actual and not hasattr(psutil.Process(process_ids[0]), 'cpu_affinity'):
logger.warning('Faking cpu affinity because it is not supported on this platform')
actual = False
# get the available processors
cpu_list = list(range(psutil.cpu_count()))
# affinities of 0 or gte cpu_count, equals to no affinity
if not n or n >= len(cpu_list):
return
# spread the workers over the available processors.
index = 0
for pid in process_ids:
affinity = []
for k in range(n):
if index == len(cpu_list):
index = 0
affinity.append(cpu_list[index])
index += 1
if psutil.pid_exists(pid):
p = psutil.Process(pid)
if actual:
p.cpu_affinity(affinity)
logger.info(_('{} will use cpu {}').format(pid, affinity))
def reincarnate(self, process):
"""
:param process: the process to reincarnate
:type process: Process or None
"""
close_old_django_connections()
if process == self.monitor:
self.monitor = self.spawn_monitor()
logger.error(
_(f"reincarnated monitor {process.name} after sudden death"))
elif process == self.pusher:
self.pusher = self.spawn_pusher()
logger.error(
_(f"reincarnated pusher {process.name} after sudden death"))
else:
self.pool.remove(process)
self.spawn_worker()
if process.timer.value == 0:
# only need to terminate on timeout, otherwise we risk destabilizing the queues
process.terminate()
logger.warning(
_(f"reincarnated worker {process.name} after timeout"))
elif int(process.timer.value) == -2:
logger.info(_(f"recycled worker {process.name}"))
else:
logger.error(
_(f"reincarnated worker {process.name} after death"))
self.reincarnations += 1
def set_cpu_affinity(n, process_ids, actual=not Conf.TESTING):
"""
Sets the cpu affinity for the supplied processes.
Requires the optional psutil module.
:param int n: affinity
:param list process_ids: a list of pids
:param bool actual: Test workaround for Travis not supporting cpu affinity
"""
# check if we have the psutil module
if not psutil:
logger.warning('Skipping cpu affinity because psutil was not found.')
return
# check if the platform supports cpu_affinity
if actual and not hasattr(psutil.Process(process_ids[0]), 'cpu_affinity'):
logger.warning('Faking cpu affinity because it is not supported on this platform')
actual = False
# get the available processors
cpu_list = list(range(psutil.cpu_count()))
# affinities of 0 or gte cpu_count, equals to no affinity
if not n or n >= len(cpu_list):
return
# spread the workers over the available processors.
index = 0
for pid in process_ids:
affinity = []
for k in range(n):
if index == len(cpu_list):
index = 0
affinity.append(cpu_list[index])
index += 1
if psutil.pid_exists(pid):
p = psutil.Process(pid)
if actual:
p.cpu_affinity(affinity)
logger.info(_('{} will use cpu {}').format(pid, affinity))
def close_old_django_connections():
"""
Close django connections unless running with sync=True.
"""
if Conf.SYNC:
logger.warning(
"Preserving django database connections because sync=True. Beware "
"that tasks are now injected in the calling context/transactions "
"which may result in unexpected bahaviour.")
else:
db.close_old_connections()
def reincarnate_worker(self, process):
"""
:param process: the process to reincarnate
:type process: Process or None
"""
close_old_django_connections()
self.pool.remove(process)
# Delete Worker model entry
WorkerModel.objects.filter(id=process.id).delete()
self.spawn_worker()
if process.timer.value == 0:
# only need to terminate on timeout, otherwise we risk destabilizing the queues
process.terminate()
logger.warning(
_(f"reincarnated worker {process.name} after timeout"))
elif int(process.timer.value) == -2:
logger.info(_(f"recycled worker {process.name}"))
else:
logger.error(_(f"reincarnated worker {process.name} after death"))
self.reincarnations += 1
