def test_save_and_restore(ray_start_2_cpus, num_replicas): # noqa: F811
trainer1 = PyTorchTrainer(
model_creator,
data_creator,
optimizer_creator,
loss_creator=lambda config: nn.MSELoss(),
num_replicas=num_replicas)
trainer1.train()
filename = os.path.join(tempfile.mkdtemp(), "checkpoint")
trainer1.save(filename)
model1 = trainer1.get_model()
trainer1.shutdown()
trainer2 = PyTorchTrainer(
model_creator,
data_creator,
optimizer_creator,
loss_creator=lambda config: nn.MSELoss(),
num_replicas=num_replicas)
trainer2.restore(filename)
os.remove(filename)
model2 = trainer2.get_model()
model1_state_dict = model1.state_dict()
model2_state_dict = model2.state_dict()
assert set(model1_state_dict.keys()) == set(model2_state_dict.keys())
for k in model1_state_dict:
assert torch.equal(model1_state_dict[k], model2_state_dict[k])
def train_example(num_replicas=1,
num_epochs=5,
use_gpu=False,
use_fp16=False,
test_mode=False):
config = {TEST_MODE: test_mode}
trainer1 = PyTorchTrainer(ResNet18,
cifar_creator,
optimizer_creator,
nn.CrossEntropyLoss,
scheduler_creator=scheduler_creator,
initialization_hook=initialization_hook,
num_replicas=num_replicas,
config=config,
use_gpu=use_gpu,
batch_size=16 if test_mode else 512,
backend="nccl" if use_gpu else "gloo",
scheduler_step_freq="epoch",
use_fp16=use_fp16)
for i in range(num_epochs):
# Increase `max_retries` to turn on fault tolerance.
stats = trainer1.train(max_retries=0)
print(stats)
print(trainer1.validate())
trainer1.shutdown()
print("success!")
def test_multi_model(ray_start_2_cpus, num_replicas): # noqa: F811
def custom_train(config, models, dataloader, criterion, optimizers,
**kwargs):
result = {}
for i, (model, optimizer) in enumerate(zip(models, optimizers)):
result["model_{}".format(i)] = train(config, model, dataloader,
criterion, optimizer)
return result
def multi_model_creator(config):
return nn.Linear(1, 1), nn.Linear(1, 1)
def multi_optimizer_creator(models, config):
opts = [
torch.optim.SGD(model.parameters(), lr=0.0001) for model in models
]
return opts[0], opts[1]
trainer1 = PyTorchTrainer(
multi_model_creator,
data_creator,
multi_optimizer_creator,
loss_creator=lambda config: nn.MSELoss(),
train_function=custom_train,
num_replicas=num_replicas)
trainer1.train()
filename = os.path.join(tempfile.mkdtemp(), "checkpoint")
trainer1.save(filename)
models1 = trainer1.get_model()
trainer1.shutdown()
trainer2 = PyTorchTrainer(
multi_model_creator,
data_creator,
multi_optimizer_creator,
loss_creator=lambda config: nn.MSELoss(),
num_replicas=num_replicas)
trainer2.restore(filename)
os.remove(filename)
models2 = trainer2.get_model()
for model_1, model_2 in zip(models1, models2):
model1_state_dict = model_1.state_dict()
model2_state_dict = model_2.state_dict()
assert set(model1_state_dict.keys()) == set(model2_state_dict.keys())
for k in model1_state_dict:
assert torch.equal(model1_state_dict[k], model2_state_dict[k])
trainer2.shutdown()
def train_example(num_replicas=1, use_gpu=False):
trainer1 = PyTorchTrainer(model_creator,
data_creator,
optimizer_creator,
num_replicas=num_replicas,
use_gpu=use_gpu,
backend="gloo")
trainer1.train()
trainer1.shutdown()
print("success!")
def test_multi_model_matrix(ray_start_2_cpus, num_replicas): # noqa: F811
def custom_train(config, model, dataloader, criterion, optimizer,
scheduler):
if config.get("models", 1) > 1:
assert len(model) == config["models"], config
if config.get("optimizers", 1) > 1:
assert len(optimizer) == config["optimizers"], config
if config.get("schedulers", 1) > 1:
assert len(scheduler) == config["schedulers"], config
return {"done": 1}
def multi_model_creator(config):
models = []
for i in range(config.get("models", 1)):
models += [nn.Linear(1, 1)]
return models[0] if len(models) == 1 else models
def multi_optimizer_creator(models, config):
optimizers = []
main_model = models[0] if type(models) is list else models
for i in range(config.get("optimizers", 1)):
optimizers += [torch.optim.SGD(main_model.parameters(), lr=0.0001)]
return optimizers[0] if len(optimizers) == 1 else optimizers
def multi_scheduler_creator(optimizer, config):
schedulers = []
main_opt = optimizer[0] if type(optimizer) is list else optimizer
for i in range(config.get("schedulers", 1)):
schedulers += [
torch.optim.lr_scheduler.StepLR(
main_opt, step_size=30, gamma=0.1)
]
return schedulers[0] if len(schedulers) == 1 else schedulers
for model_count in range(1, 3):
for optimizer_count in range(1, 3):
for scheduler_count in range(1, 3):
trainer = PyTorchTrainer(
multi_model_creator,
data_creator,
multi_optimizer_creator,
loss_creator=nn.MSELoss,
scheduler_creator=multi_scheduler_creator,
train_function=custom_train,
num_replicas=num_replicas,
config={
"models": model_count,
"optimizers": optimizer_count,
"schedulers": scheduler_count
})
trainer.train()
trainer.shutdown()
def train_example(num_replicas=1, use_gpu=False):
trainer1 = PyTorchTrainer(model_creator,
data_creator,
optimizer_creator,
num_replicas=num_replicas,
resources_per_replica=Resources(
num_cpus=1,
num_gpus=int(use_gpu),
resources={}))
trainer1.train()
trainer1.shutdown()
def test_scheduler_validate(ray_start_2_cpus): # noqa: F811
def custom_train(config, model, dataloader, criterion, optimizer,
scheduler):
return {"done": 1}
from torch.optim.lr_scheduler import ReduceLROnPlateau
trainer = PyTorchTrainer(
model_creator,
data_creator,
optimizer_creator,
loss_creator=lambda config: nn.MSELoss(),
scheduler_creator=lambda optimizer, cfg: ReduceLROnPlateau(optimizer))
trainer.update_scheduler(0.5)
trainer.update_scheduler(0.5)
assert all(
trainer.apply_all_workers(lambda r: r.schedulers[0].last_epoch == 2))
trainer.shutdown()
def test_scheduler_freq(ray_start_2_cpus, scheduler_freq): # noqa: F811
def custom_train(config, model, dataloader, criterion, optimizer,
scheduler):
assert config[SCHEDULER_STEP] == scheduler_freq
return {"done": 1}
def scheduler_creator(optimizer, config):
return torch.optim.lr_scheduler.StepLR(
optimizer, step_size=30, gamma=0.1)
trainer = PyTorchTrainer(
model_creator,
data_creator,
optimizer_creator,
loss_creator=lambda config: nn.MSELoss(),
scheduler_creator=scheduler_creator)
for i in range(3):
trainer.train()["train_loss"]
trainer.shutdown()
def train_example(num_replicas=1, use_gpu=False, test_mode=False):
config = {"test_mode": test_mode}
trainer1 = PyTorchTrainer(ResNet18,
cifar_creator,
optimizer_creator,
nn.CrossEntropyLoss,
initialization_hook=initialization_hook,
train_function=train,
validation_function=validate,
num_replicas=num_replicas,
config=config,
use_gpu=use_gpu,
batch_size=16 if test_mode else 512,
backend="nccl" if use_gpu else "gloo")
for i in range(5):
stats = trainer1.train()
print(stats)
print(trainer1.validate())
trainer1.shutdown()
print("success!")