def _update_config_proto(self, config_proto):
updated_config = copy.deepcopy(config_proto)
# Enable the scoped allocator optimization for CollectiveOps. This
# optimization converts many small all-reduces into fewer larger
# all-reduces.
rewrite_options = updated_config.graph_options.rewrite_options
rewrite_options.scoped_allocator_optimization = (
rewriter_config_pb2.RewriterConfig.ON)
# We turn on ScopedAllocator only for CollectiveReduce op, i.e. enable_op =
# ["CollectiveReduce"]. Since we can't assign to a repeated proto field, we
# clear and then append.
del rewrite_options.scoped_allocator_opts.enable_op[:]
rewrite_options.scoped_allocator_opts.enable_op.append("CollectiveReduce")
if self._communication == cross_device_ops_lib.CollectiveCommunication.NCCL:
updated_config.experimental.collective_nccl = True
if not self._cluster_spec:
return updated_config
assert self._task_type
assert self._task_id is not None
# Collective group leader is needed for collective ops to coordinate
# workers.
updated_config.experimental.collective_group_leader = (
multi_worker_util.collective_leader(self._cluster_spec, self._task_type,
self._task_id))
# The device filters prevent communication between workers.
del updated_config.device_filters[:]
updated_config.device_filters.append(
"/job:%s/task:%d" % (self._task_type, self._task_id))
return updated_config
def testWorkerAsLeader(self):
cluster_spec = {
"worker": ["127.0.0.1:8964", "127.0.0.1:2333"],
"ps": ["127.0.0.1:1926", "127.0.0.1:3141"]
}
self.assertEqual(
multi_worker_util.collective_leader(cluster_spec, "worker", 1),
"/job:worker/replica:0/task:0")
def testLeaderForEvaluator(self):
cluster_spec = {
"chief": ["127.0.0.1:1234"],
"worker": ["127.0.0.1:8964", "127.0.0.1:2333"],
"ps": ["127.0.0.1:1926", "127.0.0.1:3141"],
"evaluator": ["127.0.0.1:2019"]
}
self.assertEqual(
multi_worker_util.collective_leader(cluster_spec, "evaluator", 0), "")
def _update_config_proto(self, config_proto):
updated_config = copy.deepcopy(config_proto)
# Enable the scoped allocator optimization for CollectiveOps. This
# optimization converts many small all-reduces into fewer larger
# all-reduces.
rewrite_options = updated_config.graph_options.rewrite_options
rewrite_options.scoped_allocator_optimization = (
rewriter_config_pb2.RewriterConfig.ON)
# We turn on ScopedAllocator only for CollectiveReduce op, i.e. enable_op =
# ["CollectiveReduce"]. Since we can't assign to a repeated proto field, we
# clear and then append.
del rewrite_options.scoped_allocator_opts.enable_op[:]
rewrite_options.scoped_allocator_opts.enable_op.append("CollectiveReduce")
if ((self._communication ==
cross_device_ops_lib.CollectiveCommunication.NCCL) and
self._num_gpus_per_worker > 0):
updated_config.experimental.collective_nccl = True
if not self._cluster_spec:
return updated_config
assert self._task_type
assert self._task_id is not None
# Collective group leader is needed for collective ops to coordinate
# workers.
updated_config.experimental.collective_group_leader = (
multi_worker_util.collective_leader(self._cluster_spec, self._task_type,
self._task_id))
# The device filters prevent communication between workers.
del updated_config.device_filters[:]
updated_config.device_filters.append(
"/job:%s/task:%d" % (self._task_type, self._task_id))
return updated_config
def _initialize_multi_worker(self, cluster_resolver):
"""Initializes the object for multi-worker training."""
cluster_spec = multi_worker_util.normalize_cluster_spec(
cluster_resolver.cluster_spec())
task_type = cluster_resolver.task_type
task_id = cluster_resolver.task_id
if task_type is None or task_id is None:
raise ValueError(
"When `cluster_spec` is given, you must also specify "
"`task_type` and `task_id`.")
self._cluster_spec = cluster_spec
self._task_type = task_type
self._task_id = task_id
self._num_workers = multi_worker_util.worker_count(
cluster_spec, task_type)
if not self._num_workers:
raise ValueError(
"No `worker`, `chief` or `evaluator` tasks can be found "
"in `cluster_spec`.")
self._is_chief = multi_worker_util.is_chief(cluster_spec, task_type,
task_id)
self._worker_device = "/job:%s/task:%d" % (task_type, task_id)
self._host_input_device = numpy_dataset.SingleDevice(
self._worker_device)
if (ops.executing_eagerly_outside_functions() and
not getattr(self, "_local_or_standalone_client_mode", False)):
context.context().configure_collective_ops(
collective_leader=multi_worker_util.collective_leader(
cluster_spec, task_type, task_id),
scoped_allocator_enabled_ops=("CollectiveReduce", ),
use_nccl_communication=(
self._communication ==
cross_device_ops_lib.CollectiveCommunication.NCCL),
device_filters=("/job:%s/task:%d" % (task_type, task_id), ))
self._collective_ops_configured = True
# Starting a std server in eager mode and in independent worker mode.
if (context.executing_eagerly()
and not getattr(self, "_std_server_started", False) and
not getattr(self, "_local_or_standalone_client_mode", False)):
# Checking _local_or_standalone_client_mode as well because we should not
# create the std server in standalone client mode.
config_proto = config_pb2.ConfigProto()
config_proto = self._update_config_proto(config_proto)
server_def = tensorflow_server_pb2.ServerDef(
cluster=cluster_spec.as_cluster_def(),
default_session_config=config_proto,
job_name=task_type,
task_index=task_id,
protocol=cluster_resolver.rpc_layer or "grpc")
context.context().enable_collective_ops(server_def)
self._std_server_started = True
# The `ensure_initialized` is needed before calling
# `context.context().devices()`.
context.context().ensure_initialized()
logging.info(
"Enabled multi-worker collective ops with available devices: %r",
context.context().devices())
# TODO(yuefengz): The `num_gpus` is only for this particular task. It
# assumes all workers have the same number of GPUs. We should remove this
# assumption by querying all tasks for their numbers of GPUs.
# TODO(b/126786766): TFConfigClusterResolver returns wrong number of GPUs in
# some cases.
if isinstance(cluster_resolver, TFConfigClusterResolver):
num_gpus = context.num_gpus()
else:
num_gpus = cluster_resolver.num_accelerators().get("GPU", 0)
if num_gpus:
local_devices = tuple("%s/device:GPU:%d" % (self._worker_device, i)
for i in range(num_gpus))
else:
local_devices = (self._worker_device, )
self._collective_keys = cross_device_utils.CollectiveKeys()
super(CollectiveAllReduceExtended,
self)._initialize_local(local_devices)
self._input_workers = input_lib.InputWorkers(
self._device_map, [(self._worker_device, self.worker_devices)])
self._cross_device_ops = cross_device_ops_lib.CollectiveAllReduce(
num_workers=self._num_workers,
num_gpus_per_worker=num_gpus,
collective_keys=self._collective_keys)
# Add a default device so that ops without specified devices will not end up
# on other workers.
self._default_device = "/job:%s/task:%d" % (task_type, task_id)
# Save the num_gpus_per_worker and rpc_layer for configure method.
self._num_gpus_per_worker = num_gpus
self._rpc_layer = cluster_resolver.rpc_layer
self._warn_nccl_no_gpu()
logging.info(
"Multi-worker CollectiveAllReduceStrategy with cluster_spec = %r, "
"task_type = %r, task_id = %r, num_workers = %r, local_devices = %r, "
"communication = %s", cluster_spec.as_dict(), task_type, task_id,
self._num_workers, local_devices, self._communication)
def _initialize_multi_worker(self, cluster_resolver):
"""Initializes the object for multi-worker training."""
cluster_spec = multi_worker_util.normalize_cluster_spec(
cluster_resolver.cluster_spec())
task_type = cluster_resolver.task_type
task_id = cluster_resolver.task_id
if task_type is None or task_id is None:
raise ValueError(
"When `cluster_spec` is given, you must also specify "
"`task_type` and `task_id`.")
self._cluster_spec = cluster_spec
self._task_type = task_type
self._task_id = task_id
self._id_in_cluster = multi_worker_util.id_in_cluster(
self._cluster_spec, self._task_type, self._task_id)
self._num_workers = multi_worker_util.worker_count(
cluster_spec, task_type)
if not self._num_workers:
raise ValueError(
"No `worker`, `chief` or `evaluator` tasks can be found "
"in `cluster_spec`.")
self._is_chief = multi_worker_util.is_chief(cluster_spec, task_type,
task_id)
self._worker_device = "/job:%s/task:%d" % (task_type, task_id)
self._host_input_device = numpy_dataset.SingleDevice(
self._worker_device)
if (ops.executing_eagerly_outside_functions() and
not getattr(self, "_local_or_standalone_client_mode", False)):
context.context().configure_collective_ops(
collective_leader=multi_worker_util.collective_leader(
cluster_spec, task_type, task_id),
scoped_allocator_enabled_ops=("CollectiveReduce", ),
device_filters=("/job:%s/task:%d" % (task_type, task_id), ))
self._collective_ops_configured = True
if context.context().coordination_service is None:
coordinated_jobs = ["chief", "worker"]
if task_type in coordinated_jobs:
context.context().configure_coordination_service(
service_type="standalone",
service_leader=multi_worker_util.coordination_leader(
cluster_spec),
coordinated_jobs=coordinated_jobs)
# Starting a std server in eager mode and in independent worker mode.
if (context.executing_eagerly()
and not getattr(self, "_std_server_started", False) and
not getattr(self, "_local_or_standalone_client_mode", False)):
# Checking _local_or_standalone_client_mode as well because we should not
# create the std server in standalone client mode.
config_proto = copy.deepcopy(context.context().config)
config_proto = self._update_config_proto(config_proto)
# If coordination service is enabled, use its internal heartbeat to detect
# peer failures instead of the Python-level health check.
if config_proto.experimental.coordination_config.service_type:
self._enable_check_health = False
if hasattr(cluster_resolver, "port"):
port = cluster_resolver.port
else:
port = 0
server_def = tensorflow_server_pb2.ServerDef(
cluster=cluster_spec.as_cluster_def(),
default_session_config=config_proto,
job_name=task_type,
task_index=task_id,
protocol=cluster_resolver.rpc_layer or "grpc",
port=port)
context.context().enable_collective_ops(server_def)
self._std_server_started = True
# The `ensure_initialized` is needed before calling
# `context.context().devices()`.
context.context().ensure_initialized()
logging.info(
"Enabled multi-worker collective ops with available devices: %r",
context.context().devices())
# TODO(yuefengz): The `num_gpus` is only for this particular task. It
# assumes all workers have the same number of GPUs. We should remove this
# assumption by querying all tasks for their numbers of GPUs.
# TODO(b/126786766): TFConfigClusterResolver returns wrong number of GPUs in
# some cases.
local_devices, local_device_type = self._initialize_local_devices(
cluster_resolver, self._worker_device)
if local_device_type == "TPU":
tpu_strategy_util.initialize_tpu_system()
self._collective_keys = cross_device_utils.CollectiveKeys(
group_key_start=1 + self._collective_key_base)
self._cross_device_ops = cross_device_ops_lib.CollectiveAllReduce(
devices=local_devices,
group_size=len(local_devices) * self._num_workers,
options=self._communication_options,
collective_keys=self._collective_keys)
# CrossDeviceOps for per host tensors.
self._host_cross_device_ops = cross_device_ops_lib.CollectiveAllReduce(
devices=[self._worker_device],
group_size=self._num_workers,
options=self._communication_options,
collective_keys=self._collective_keys)
super(CollectiveAllReduceExtended,
self)._initialize_single_worker(local_devices)
# Add a default device so that ops without specified devices will not end up
# on other workers.
self._default_device = "/job:%s/task:%d" % (task_type, task_id)
# Save the num_devices_per_worker and rpc_layer for configure method.
self._num_devices_per_worker = len(local_devices)
self._local_device_type = local_device_type
self._rpc_layer = cluster_resolver.rpc_layer
self._warn_nccl_no_gpu()
if self._enable_check_health and context.executing_eagerly():
self._start_check_health_thread()
else:
logging.info("Check health not enabled.")
logging.info(
"MultiWorkerMirroredStrategy with cluster_spec = %r, task_type = %r, "
"task_id = %r, num_workers = %r, local_devices = %r, "
"communication = %s", cluster_spec.as_dict(), task_type, task_id,
self._num_workers, local_devices,
self._communication_options.implementation)
def testLocalLeader(self):
cluster_spec = {}
self.assertEqual(
multi_worker_util.collective_leader(cluster_spec, None, 0), "")
