def setUp(self):
super(_VirtualDeviceTestCase, self).setUp()
ctx = context.context()
if ctx.list_physical_devices("TPU"):
self.device_type = "TPU"
tpu_strategy_util.initialize_tpu_system()
elif ctx.list_physical_devices("GPU"):
self.device_type = "GPU"
gpus = ctx.list_physical_devices(self.device_type)
ctx.set_logical_device_configuration(gpus[0], [
context.LogicalDeviceConfiguration(memory_limit=100),
context.LogicalDeviceConfiguration(memory_limit=100),
])
else:
self.device_type = "CPU"
cpus = ctx.list_physical_devices("CPU")
ctx.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
])
self.device = parallel_device.ParallelDevice(components=[
"/job:localhost/device:{}:0".format(self.device_type),
self.device_type + ":1"
])
self.assertIn(self.device_type + ":0", self.device.components[0])
self.assertIn(self.device_type + ":1", self.device.components[1])
def testMultipleGroups(self):
context._reset_context()
cpus = config.list_physical_devices('CPU')
self.assertEqual(len(cpus), 1)
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
context.ensure_initialized()
num_elements = 4
@def_function.function
def run_all_reduce(group_size, group_key):
instance_key = group_key
input_value = [group_key for i in range(num_elements)]
collectives = []
for device_idx in range(group_size):
with ops.device('/CPU:{}'.format(device_idx)):
input_tensor = constant_op.constant(input_value)
collectives.append(collective_ops.all_reduce(
input_tensor, group_size, group_key, instance_key, merge_op='Add',
final_op='Id'))
return collectives
def run_and_assert(group_size, group_key):
for reduced_tensor in run_all_reduce(group_size, group_key):
self.assertAllEqual(
[group_key * group_size for i in range(num_elements)],
reduced_tensor.numpy())
run_and_assert(group_size=2, group_key=1)
run_and_assert(group_size=3, group_key=2)
def test_save_variable_devices(self, save_devices, meta_graph_only):
context._reset_context()
cpus = context.context().list_physical_devices("CPU")
if len(cpus) == 1:
context.context().set_logical_device_configuration(
cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
context.ensure_initialized()
root = tracking.AutoTrackable()
with ops.device("CPU:0"):
root.v0 = variables.Variable(1., name="v0")
with ops.device("CPU:1"):
root.v1 = variables.Variable(1., name="v1")
options = save_options.SaveOptions(
experimental_variable_policy=save_devices)
file_name = os.path.join(self.get_temp_dir(), "saved_model")
if meta_graph_only:
save.export_meta_graph(obj=root, filename=file_name, options=options)
else:
save.save(obj=root, export_dir=file_name, options=options)
meta = None
if meta_graph_only:
meta = meta_graph.read_meta_graph_file(file_name)
else:
meta = loader_impl.parse_saved_model(file_name).meta_graphs[0]
# Check devices in meta graph nodes.
graph_def = meta.graph_def
v0 = next((n for n in graph_def.node if n.name == "v0"), None)
v1 = next((n for n in graph_def.node if n.name == "v1"), None)
self.assertIsNotNone(v0)
self.assertIsNotNone(v1)
if save_devices == save_options.VariablePolicy.SAVE_VARIABLE_DEVICES:
self.assertIn("CPU:0", v0.device)
self.assertIn("CPU:1", v1.device)
else:
self.assertEmpty(v0.device)
self.assertEmpty(v1.device)
# Check devices in object graph nodes.
object_graph_def = meta.object_graph_def
v0 = next((n.variable
for n in object_graph_def.nodes
if n.HasField("variable") and n.variable.name == "v0"), None)
v1 = next((n.variable
for n in object_graph_def.nodes
if n.HasField("variable") and n.variable.name == "v1"), None)
self.assertIsNotNone(v0)
self.assertIsNotNone(v1)
if save_devices == save_options.VariablePolicy.SAVE_VARIABLE_DEVICES:
self.assertIn("CPU:0", v0.device)
self.assertIn("CPU:1", v1.device)
else:
self.assertEmpty(v0.device)
self.assertEmpty(v1.device)
def _mimic_two_cpus():
cpus = config.list_physical_devices("CPU")
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
])
def testCollectiveGroupSizeMismatch(self):
cpus = config.list_physical_devices('CPU')
self.assertEqual(len(cpus), 1)
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
context.ensure_initialized()
@def_function.function
def run_all_reduce():
group_key = 10
instance_key = 20
t0 = [1, 2, 3, 4]
t1 = [5, 6, 7, 8]
with ops.device('/CPU:0'):
in0 = constant_op.constant(t0)
c0 = collective_ops.all_reduce(
in0, group_size=2, group_key=group_key, instance_key=instance_key,
merge_op='Add', final_op='Id')
with ops.device('/CPU:1'):
in1 = constant_op.constant(t1)
c1 = collective_ops.all_reduce(
in1, group_size=3, group_key=group_key, instance_key=instance_key,
merge_op='Add', final_op='Id')
return c0, c1
with self.assertRaisesRegexp(errors.InternalError,
'but that group has size'):
run_all_reduce()
def setUp(self):
super(StatefulRandomOpsTest, self).setUp()
physical_devices = config.list_physical_devices("CPU")
config.set_logical_device_configuration(physical_devices[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
def configure_virtual_cpus():
cpus = config.list_physical_devices('CPU')
# Set 2 virtual CPUs
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
def test_expand_distributed_variables(self, expand_strategy, policy):
# 1. Create a context with both CPU:0 and CPU:1.
context._reset_context()
cpus = context.context().list_physical_devices("CPU")
if len(cpus) == 1:
context.context().set_logical_device_configuration(
cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
context.ensure_initialized()
# 2. Create and save a model under a mirrored strategy.
file_name = os.path.join(self.get_temp_dir(), "saved_model.pb")
strategy = mirrored_strategy.MirroredStrategy(["CPU:0", "CPU:1"])
strategy.extended._use_var_policy = policy
with strategy.scope():
root = tracking.AutoTrackable()
root.v = variables.Variable([1., 1.], name="v")
@def_function.function(input_signature=[])
def f():
root.v.assign([2., 2.])
root.f = f
save.export_meta_graph(
obj=root,
filename=file_name,
options=save_options.SaveOptions(
experimental_variable_policy=expand_strategy))
# 3. Read the output file and test behavior.
meta_graph_def = meta_graph.read_meta_graph_file(file_name)
object_graph = meta_graph_def.object_graph_def
graph_def = meta_graph_def.graph_def
v = next((n.variable
for n in object_graph.nodes
if n.HasField("variable") and n.variable.name == "v"), None)
saved_function = next((f for f in graph_def.library.function
if "inference_f_" in f.signature.name), None)
self.assertIsNotNone(saved_function)
if (expand_strategy ==
save_options.VariablePolicy.EXPAND_DISTRIBUTED_VARIABLES):
# experimental_save_variable_devices should have been automatically set.
self.assertIn("CPU:0", v.device)
components = v.experimental_distributed_variable_components
self.assertLen(components, 2)
v0 = next((x for x in components if x.name == "v"), None)
v1 = next((x for x in components if x.name == "v/replica_1"), None)
self.assertIsNotNone(v0)
self.assertIsNotNone(v1)
self.assertIn("CPU:0", v0.device)
self.assertIn("CPU:1", v1.device)
self.assertLen(saved_function.signature.input_arg, 2)
else:
self.assertEmpty(v.device)
self.assertEmpty(v.experimental_distributed_variable_components)
self.assertLen(saved_function.signature.input_arg, 1)
def setUp(self):
super(LayerCorrectnessTest, self).setUp()
# Set two virtual CPUs to test MirroredStrategy with multiple devices
cpus = config_module.list_physical_devices('CPU')
config_module.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
])
def setUp(self):
super(RpcOpsTest, self).setUp()
cpus = config.list_physical_devices("CPU")
# Set 2 virtual CPUs
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
def setUp(self):
super(PackedDistributedVariableTest, self).setUp()
cpus = config.list_physical_devices('CPU')
# Set 2 virtual CPUs
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
])
def testCollectiveGroupSizeMismatch(self):
cpus = config.list_physical_devices('CPU')
self.assertEqual(len(cpus), 1)
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
context.ensure_initialized()
def _setup_context(self, num_cpus=2):
context._reset_context()
cpus = config.list_physical_devices('CPU')
self.assertEqual(len(cpus), 1)
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
context.ensure_initialized()
def __init__(self, methodName='runTest'): # pylint: disable=invalid-name
super(TestMultiGPUModel, self).__init__(methodName)
gpu_devices = config.list_physical_devices('GPU')
if len(gpu_devices) == 1:
# A GPU is available, simulate 2 instead.
config.set_logical_device_configuration(gpu_devices[0], [
context.LogicalDeviceConfiguration(500),
context.LogicalDeviceConfiguration(500)
])
def testAbortInstanceParamsResolution(self):
cpus = config.list_physical_devices('CPU')
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
group_size = 2
group_key = 100
instance_key = 100
in_tensor = constant_op.constant(1.)
def collective_fn():
for device in ['CPU:0', 'CPU:1']:
with ops.device(device):
collective_ops.all_reduce(in_tensor,
group_size,
group_key,
instance_key,
'Add',
'Id',
communication_hint='ring')
# First perform a normal all-reduce to complete the group resolution.
def_function.function(collective_fn)()
def abort_fn():
time.sleep(2)
context.context().abort_collective_ops(errors.UNAVAILABLE,
'peer down')
t = threading.Thread(target=abort_fn)
t.start()
# Use a different instance key to trigger another instance resolution.
instance_key = 101
with self.assertRaisesRegex(errors.UnavailableError, 'peer down'):
# This hangs on params resolution since we're only launching one
# collective for a group size of 2.
collective_ops.all_reduce(in_tensor, group_size, group_key,
instance_key, 'Add', 'Id')
# After abortion, subsequent collectives should fail immediately.
with self.assertRaisesRegex(errors.UnavailableError, 'peer down'):
collective_ops.all_reduce(in_tensor, group_size, group_key,
instance_key, 'Add', 'Id')
# Reset the context in order to reset the collective executor.
context._reset_context() # pylint: disable=protected-access
t.join()
# After reset non-NCCL collectives should work.
cpus = config.list_physical_devices('CPU')
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
def_function.function(collective_fn)()
def set_up_virtual_devices():
global _virtual_devices_ready
if _virtual_devices_ready:
return
physical_devices = config.list_physical_devices('CPU')
config.set_logical_device_configuration(physical_devices[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
_virtual_devices_ready = True
def setUp(self):
super(FunctionGradientsTest, self).setUp()
cpus = config.list_physical_devices('CPU')
# Set 4 virtual CPUs
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
def _ensure_context_initialized(self):
gpus = config.list_physical_devices('GPU')
if len(gpus) < 1:
self.skipTest('Expected at least 1 GPU but found {} GPUs'.format(
len(gpus)))
config.set_logical_device_configuration(gpus[0], [
context.LogicalDeviceConfiguration(1024),
context.LogicalDeviceConfiguration(1024)
])
context.ensure_initialized()
def _setup_context():
context._reset_context()
cpus = config.list_physical_devices('CPU')
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
context.ensure_initialized()
def testExecutionAfterTimeoutV2(self):
timeout = 1.5
cpus = config.list_physical_devices('CPU')
self.assertEqual(len(cpus), 1)
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
context.ensure_initialized()
group_key = 20
instance_key = 30
input_data = constant_op.constant([1, 2, 3, 4])
@def_function.function
def run_all_reduce():
for device in ['CPU:0', 'CPU:1']:
with ops.device(device):
collective_ops.all_reduce(input_data,
group_size=2,
group_key=group_key,
instance_key=instance_key,
merge_op='Add',
final_op='Id',
timeout=timeout)
# Run a normal all-reduce to complete param resolution.
run_all_reduce()
with self.assertRaisesRegex(
errors.DeadlineExceededError,
'Collective has timed out during execution'):
with ops.device('CPU:0'):
collective_ops.all_reduce(input_data,
group_size=2,
group_key=group_key,
instance_key=instance_key,
merge_op='Add',
final_op='Id',
timeout=timeout)
# We launch the second device after the first device times out. This is to
# simulate the situation when other workers are slow and the timeout is
# short. It should error immediately.
with self.assertRaisesRegex(
errors.DeadlineExceededError,
'Collective has timed out during execution'):
with ops.device('CPU:1'):
# No timeout.
collective_ops.all_reduce(input_data,
group_size=2,
group_key=group_key,
merge_op='Add',
final_op='Id',
instance_key=instance_key)
def setUp(self):
super(SaverTest, self).setUp()
cpus = config.list_physical_devices("CPU")
# Set 3 virtual CPUs
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
self.local_options = checkpoint_options.CheckpointOptions(
experimental_io_device=LOCALHOST)
def testAbortRing(self):
cpus = config.list_physical_devices('CPU')
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
group_size = 2
group_key = 100
instance_key = 100
in_tensor = constant_op.constant(1.)
# First perform a normal collective to finish resolution.
def collective_fn():
for device in ['CPU:0', 'CPU:1']:
with ops.device(device):
collective_ops.all_reduce(in_tensor,
group_size,
group_key,
instance_key,
'Add',
'Id',
communication_hint='ring')
def_function.function(collective_fn)()
# Launch a collective that hangs, and abort the collective executor after
# the launch.
def abort_fn():
time.sleep(2)
context.context().abort_collective_ops(errors.UNAVAILABLE,
'peer down')
t = threading.Thread(target=abort_fn)
t.start()
with self.assertRaisesRegex(errors.UnavailableError, 'peer down'):
collective_ops.all_reduce(in_tensor, group_size, group_key,
instance_key, 'Add', 'Id')
# After abortion, subsequent collectives should fail immediately.
with self.assertRaisesRegex(errors.UnavailableError, 'peer down'):
collective_ops.all_reduce(in_tensor, group_size, group_key,
instance_key, 'Add', 'Id')
# Reset the context in order to reset the collective executor.
t.join()
context._reset_context() # pylint: disable=protected-access
# After reset non-NCCL collectives should work.
cpus = config.list_physical_devices('CPU')
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
def_function.function(collective_fn)()
def __init__(self, methodName="runTest"): # pylint: disable=invalid-name
super(LocalReplicateTest, self).__init__(methodName)
cpus = config.list_physical_devices("CPU")
# Set 3 virtual CPUs
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
self._device0 = "/device:CPU:0"
self._device1 = "/device:CPU:1"
self._device2 = "/device:CPU:2"
def __init__(self, methodName='runTest'): # pylint: disable=invalid-name
super(TestMultiGPUModel, self).__init__(methodName)
gpu_devices = config.list_physical_devices('GPU')
xla_gpu_devices = config.list_physical_devices('XLA_GPU')
# NOTE: XLA devices don't support the set_logical_device_configuration
# codepaths.
if len(gpu_devices) == 1 and not xla_gpu_devices:
# A GPU is available, simulate 2 instead.
config.set_logical_device_configuration(gpu_devices[0], [
context.LogicalDeviceConfiguration(500),
context.LogicalDeviceConfiguration(500)
])
def _mimic_two_cpus():
try:
cpus = config.list_physical_devices("CPU")
except errors_impl.NotFoundError:
# Testing device not available. Skip the test.
return False
config.set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
])
return True
def setUp(self):
super(HardDevicePlacementTest, self).setUp()
context._reset_context()
config.set_soft_device_placement(enabled=False)
context.context().log_device_placement = True
cpus = context.context().list_physical_devices('CPU')
# Set 2 virtual CPUs
context.context().set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
self.assertEqual(config.get_soft_device_placement(), False)
self.assertEqual(context.context().soft_device_placement, False)
def setUp(self):
super(_VirtualDeviceTestCase, self).setUp()
cpus = context.context().list_physical_devices("CPU")
# Set 4 virtual CPUs
context.context().set_logical_device_configuration(cpus[0], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
self.device = parallel_device.ParallelDevice(
components=["/job:localhost/device:CPU:0", "CPU:1"])
self.assertIn("CPU:0", self.device.components[0])
self.assertIn("CPU:1", self.device.components[1])
def testGpuInvalidConfig(self):
gpus = config.list_physical_devices('GPU')
self.assertNotEqual(len(gpus), 0)
if len(gpus) > 1:
# Assert if other GPUs were not configured
config.set_memory_growth(gpus[0], True)
with self.assertRaisesRegex(ValueError, 'cannot differ'):
c = context.context().config
# If we limit visibility to GPU 0, growth is fine
config.set_visible_devices(gpus[0], 'GPU')
c = context.context().config
self.assertTrue(c.gpu_options.allow_growth)
# Default setting for second GPU is False and works if we set visibility
config.set_visible_devices(gpus[1], 'GPU')
c = context.context().config
self.assertFalse(c.gpu_options.allow_growth)
# Growth now fails because all the GPUs are visible and not the same
config.set_visible_devices(gpus, 'GPU')
with self.assertRaisesRegex(ValueError, 'cannot differ'):
c = context.context().config
for gpu in gpus:
config.set_memory_growth(gpu, True)
c = context.context().config
self.assertTrue(c.gpu_options.allow_growth)
with self.assertRaisesRegex(ValueError, 'memory limit'):
config.set_logical_device_configuration(gpus[-1], [
context.LogicalDeviceConfiguration(),
context.LogicalDeviceConfiguration()
])
self.assertIsNone(config.get_logical_device_configuration(gpus[-1]))
config.set_logical_device_configuration(gpus[-1], [
context.LogicalDeviceConfiguration(memory_limit=10),
context.LogicalDeviceConfiguration(memory_limit=10)
])
c = context.context().config
self.assertFalse(c.gpu_options.allow_growth)
with self.assertRaisesRegex(ValueError, 'virtual devices'):
config.set_memory_growth(gpus[-1], False)
def testKeepLogicalDevice(self):
gpus = tf_config.list_physical_devices('GPU')
if len(gpus) > 1:
self.skipTest(
'Skip logical device test on multi GPUs, since partial GPU '
'virtualization is not permitted.')
# Cannot change logical device after the context initialization.
context._reset_context() # pylint: disable=protected-access
cluster_spec = multi_worker_test_base.create_cluster_spec(
has_chief=False, num_workers=1)
resolver = cluster_resolver_lib.SimpleClusterResolver(
cluster_spec=multi_worker_util.normalize_cluster_spec(
cluster_spec),
task_type='worker',
task_id=0)
logical_gpus = len(gpus) * 2
for i, device in enumerate(gpus):
n = (i +
1) * logical_gpus // len(gpus) - i * logical_gpus // len(gpus)
assert n > 0 # guaranteed if count >= len(devices)
configs = []
for ordinal in range(n):
config = context.LogicalDeviceConfiguration(
memory_limit=64, experimental_device_ordinal=ordinal)
configs.append(config)
tf_config.set_logical_device_configuration(device, configs)
collective_all_reduce_strategy.CollectiveAllReduceStrategy(
cluster_resolver=resolver)
# Since we create two logical GPUs out of the last GPU, there should be one
# more logical GPUs than physical GPUs.
self.assertLen(tf_config.list_logical_devices('GPU'), logical_gpus)
context._reset_context() # pylint: disable=protected-access
def set_up_gpu_memory_limit(memory_limit_mb: int) -> None:
gpus = framework_config.list_physical_devices("GPU")
virtual_device_config = context.LogicalDeviceConfiguration(
memory_limit=memory_limit_mb)
for gpu in gpus:
framework_config.set_logical_device_configuration(
gpu, [virtual_device_config])
