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669 | class CausalLanguageModelTrainer(BaseTrainer):
def create_collate_function(
self,
max_sequence_length: int,
truncation_mode: typing.Literal["keep_end", "keep_start"] = "keep_end",
) -> Callable:
def collate_fn(batch):
results = {}
for key in batch[0].keys():
if truncation_mode == "keep_end":
corrected_sequence = [
jnp.array(f[key])[..., -max_sequence_length:] for f in batch
]
else:
corrected_sequence = [
jnp.array(f[key])[..., :max_sequence_length] for f in batch
]
results[key] = jnp.stack(corrected_sequence).reshape(
-1,
corrected_sequence[0].shape[-1]
)
return results
return collate_fn
def configure_functions(self) -> TrainerConfigureFunctionFuncOutput:
"""
The configure_functions function is responsible for configuring the functions that will be used in training.
It does this by first defining a function called function_configurations, which initializes the model parameters and returns
them as a EasyDeLState object. The EasyDeLState object contains all the information needed to train or evaluate
on a batch of data, including:
:param self: Access the class attributes
:return: A TrainerConfigureFunctionFuncOutput object
"""
def initialize_state_function():
initialized_parameters = self.model.init_weights(
jax.random.PRNGKey(0),
self.arguments.init_input_shape
)
if self.arguments.dtype == jnp.bfloat16:
initialized_parameters = self.model.to_bf16(initialized_parameters)
elif self.arguments.dtype == jnp.float16:
initialized_parameters = self.model.to_fp16(initialized_parameters)
tx = self.tx
parameters = flax.core.freeze({"params": initialized_parameters})
tx_init = copy.deepcopy(self.arguments.optimizer_kwargs)
if self.rapture is not None:
lora_parameters = self.lora_parameters
if self.arguments.dtype == jnp.bfloat16:
lora_parameters = self.model.to_bf16(lora_parameters)
elif self.arguments.dtype == jnp.float16:
lora_parameters = self.model.to_fp16(lora_parameters)
return EasyDeLState(
step=0,
apply_fn=self.lora_apply_fn,
params=lora_parameters,
tx=self.lora_tx,
opt_state=self.lora_opt_state,
tx_init=EasyDeLState.safe_dict(tx_init),
hyperparameters=EasyDeLState.create_hyperparameters(self.model.config.model_type),
module=self.lora_model,
module_config=self.model.config,
module_config_args=None,
)
else:
return EasyDeLState.create(
tx=tx,
params=parameters,
apply_fn=self.model.__call__,
module_config=copy.deepcopy(self.model.config),
tx_init=tx_init,
hyperparameters=EasyDeLState.create_hyperparameters(self.model.config.model_type),
module=self.model,
module_config_args=None
)
def create_state_from_params_function(parameters):
if self.rapture is None:
return EasyDeLState.create(
tx=self.tx,
params=parameters,
apply_fn=self.model.__call__,
module_config=copy.deepcopy(self.model.config),
tx_init=copy.deepcopy(self.arguments.optimizer_kwargs),
hyperparameters=EasyDeLState.create_hyperparameters(self.model.config.model_type),
module=self.model,
module_config_args=None
)
else:
return EasyDeLState(
step=0,
apply_fn=self.lora_apply_fn,
params=parameters,
tx=self.lora_tx,
opt_state=self.lora_opt_state,
tx_init=EasyDeLState.safe_dict(copy.deepcopy(self.arguments.optimizer_kwargs)),
hyperparameters=EasyDeLState.create_hyperparameters(self.model.config.model_type),
module=self.lora_model,
module_config=self.model.config,
module_config_args=None,
)
state_shape = jax.eval_shape(initialize_state_function)
state_partition_spec = match_partition_rules(
self.config.get_partition_rules(
fully_sharded_data_parallel=self.arguments.fully_sharded_data_parallel
) if self.arguments.custom_rule is None else self.arguments.custom_rule,
state_shape
)
create_sharded_state_from_params_function = pjit(
create_state_from_params_function,
in_shardings=(state_partition_spec.params,),
out_shardings=state_partition_spec,
donate_argnums=(0,)
)
sharded_train_step_function = pjit(
create_casual_language_model_train_step(
partition_spec=self.arguments.step_partition_spec,
label_smoothing_factor=self.arguments.label_smoothing_factor,
z_loss=self.arguments.z_loss,
),
in_shardings=(state_partition_spec, PartitionSpec()),
out_shardings=(state_partition_spec, PartitionSpec(), PartitionSpec()),
donate_argnums=(0, 0),
)
sharded_eval_step_function = pjit(
create_casual_language_model_evaluation_step(self.arguments.step_partition_spec),
in_shardings=(state_partition_spec, PartitionSpec()),
out_shardings=(PartitionSpec(), PartitionSpec(), PartitionSpec()),
donate_argnums=(0, 0),
)
mesh = self.arguments.get_mesh()
self.arguments.ckpt_path_exists()
checkpoint_manager = self.arguments.get_streaming_checkpointer()
self.state_partition_spec = state_partition_spec
self.state_shape = state_shape
return TrainerConfigureFunctionFuncOutput(
create_sharded_state_from_params_function=create_sharded_state_from_params_function,
sharded_train_step_function=sharded_train_step_function,
sharded_eval_step_function=sharded_eval_step_function,
mesh=mesh,
checkpoint_manager=checkpoint_manager,
initialize_state_function=initialize_state_function
)
def initialize_state(
self,
model_parameters: Optional[flax.core.FrozenDict] = None,
state: Optional[EasyDeLState] = None,
) -> Tuple[EasyDeLState, Mapping[str, Callable], Mapping[str, Callable]]:
if model_parameters is None and state is None and self.rapture is None and self.checkpoint_path is None:
raise RuntimeError(
"You are passing `model_parameters=None`, `state=None`, and `checkpoint_path=None` and also you are not"
" using LoRA, if you are "
"Using LoRA make sure to pass parameters and Rapture Config correctly otherwise pass the "
"model_parameters or state."
)
if model_parameters is None and state is None:
model_parameters = self.lora_parameters
with self.mesh:
shard_fns, gather_fns = make_shard_and_gather_fns(
self.state_partition_spec,
dtype_specs=self.dtype
)
if state is not None:
sharded_state = state
params = sharded_state.params if not self.arguments.do_shard_fns else jax.tree_util.tree_map(
lambda f, x: f(x),
shard_fns.params,
sharded_state.params
)
sharded_state.params = params
if sharded_state.opt_state is None:
prefix_print(
"Action", "Optimizer State is not Found!, initializing one."
)
with jax.default_device(self.arguments.offload_device):
sharded_state = sharded_state.init_opt_state()
opt_state = sharded_state.opt_state if not self.arguments.do_shard_fns else jax.tree_util.tree_map(
lambda f, x: f(x),
shard_fns.opt_state,
sharded_state.opt_state
)
sharded_state = sharded_state.replace(
opt_state=opt_state
)
elif self.finetune:
if model_parameters is None and self.checkpoint_path is not None:
prefix_print(
"Action", f"Loading Model From {self.checkpoint_path}"
)
with jax.default_device(self.arguments.offload_device):
sharded_state = EasyDeLState.load_state(
verbose=self.arguments.verbose,
state_shard_fns=shard_fns,
init_optimizer_state=True,
checkpoint_path=self.checkpoint_path,
input_shape=self.arguments.init_input_shape,
config_kwargs=self.arguments.loaded_model_config_kwargs
)
state_shape = jax.eval_shape(lambda: sharded_state)
state_partition_spec = match_partition_rules(
self.config.get_partition_rules(
fully_sharded_data_parallel=self.arguments.fully_sharded_data_parallel
) if self.arguments.custom_rule is None else self.arguments.custom_rule,
state_shape
)
sharded_train_step_function = pjit(
create_casual_language_model_train_step(
partition_spec=self.arguments.step_partition_spec,
label_smoothing_factor=self.arguments.label_smoothing_factor,
z_loss=self.arguments.z_loss,
),
in_shardings=(state_partition_spec, PartitionSpec()),
out_shardings=(state_partition_spec, PartitionSpec(), PartitionSpec()),
donate_argnums=(0, 0),
)
sharded_eval_step_function = pjit(
create_casual_language_model_evaluation_step(self.arguments.step_partition_spec),
in_shardings=(state_partition_spec, PartitionSpec()),
out_shardings=(PartitionSpec(), PartitionSpec(), PartitionSpec()),
donate_argnums=(0, 0),
)
self.state_partition_spec = state_partition_spec
self.state_shape = state_shape
self.sharded_train_step_function = sharded_train_step_function
self.sharded_eval_step_function = sharded_eval_step_function
if self.arguments.remove_ckpt_after_load:
os.remove(self.checkpoint_path)
elif model_parameters is not None and self.checkpoint_path is None:
prefix_print(
"Action", f"Sharding Passed Parameters"
)
from flax.core import unfreeze
if not isinstance(model_parameters, flax.core.FrozenDict):
prefix_print(
"Warning",
"Model Parameters should be like FrozenDict({'params': params}) make sure to "
"pass as type FrozenDict in case of not getting UnExcepted Errors "
)
model_parameters = model_parameters if not self.arguments.do_shard_fns else jax.tree_util.tree_map(
lambda f, x: f(x),
shard_fns.params,
model_parameters,
)
sharded_state = self.create_sharded_state_from_params_function(model_parameters)
elif model_parameters is not None and self.checkpoint_path is not None:
raise EasyDeLTimerError(
"You can't pass `model_parameters` and `checkpoint_path` at same time"
)
else:
raise EasyDeLTimerError(
"You should pass `model_parameters` or `checkpoint_path` to trainer in order to load model"
)
else:
sharded_state = self.initialize_state_function()
params = sharded_state.params if not self.arguments.do_shard_fns else jax.tree_util.tree_map(
lambda f, x: f(x),
shard_fns.params,
sharded_state.params
)
sharded_state.params = params
self.sharded_state = sharded_state
return sharded_state, shard_fns, gather_fns
def _save_state(
self,
state: EasyDeLState,
gather_fns: Optional[Any | Mapping[str, Callable] | dict[Callable]],
milestone: bool = False
) -> str:
step = int(
jax.device_get(
state.step
)
) + self.arguments.step_start_point if self.arguments.step_start_point is not None else int(
jax.device_get(
state.step
)
)
checkpoint_dir = os.path.join(self.arguments.save_dir, self.arguments.model_name)
filename_extension = ".easy"
if self.arguments.save_total_limit:
checkpoint_files = glob(os.path.join(checkpoint_dir, f"*{filename_extension}"))
checkpoint_files.sort(key=os.path.getmtime)
for old_checkpoint in checkpoint_files[:-self.arguments.save_total_limit]:
os.remove(old_checkpoint)
termcolor.cprint(f"Removed old checkpoint: {old_checkpoint}", color="red", force_color=True)
checkpoint_name = f"{self.arguments.model_name}-S{step}"
filename = f"{checkpoint_name}_{step}" if milestone else f"{checkpoint_name}"
filename += ".easy"
termcolor.cprint(f"Saving Model {filename}.", color="cyan", force_color=True)
state.save_state(
filename=filename,
checkpoint_dir=checkpoint_dir,
gather_fns=gather_fns,
float_dtype=self.dtype,
verbose=self.arguments.verbose,
save_optimizer=self.arguments.save_optimizer_state,
)
return filename
def train(
self,
model_parameters: Optional[flax.core.FrozenDict] = None,
state: Optional[EasyDeLState] = None
) -> CausalLMTrainerOutput:
"""
The train function is the main function of this module.
It takes a model_parameters argument which can be used to load a pretrained model and finetune it.
The train function returns an CausalLMTrainerOutput object that contains the last saved file name, predict func,
train state, mesh and checkpoint streamer.
:param self: Make the class methods aware of other methods and attributes within the class
:param model_parameters: flax.core.FrozenDict: Load a pre-trained model
:param state: Optional[EasyDeLState]: Ready to Use State
:return: An object of type "CausalLMTrainerOutput"
"""
def get_layer_names(frozen_dict, prefix=""):
layer_names = {}
for key, value in frozen_dict.items():
if isinstance(value, FrozenDict):
layer_names.update(get_layer_names(value, prefix=f"{prefix}_{key}"))
else:
layer_name = f"{prefix}_{key}".lstrip("/")
layer_names[layer_name] = value
return layer_names
def count_model_parameters(_p):
termcolor.cprint(
f"Model Contain {sum(n.size for n in jax.tree_util.tree_flatten(flax.core.unfreeze(_p))[0]) / 1e9} "
f"Billion Parameters",
color="red", force_color=True
)
checkpoint_path = "SAVING_SKIPPED"
if self.arguments.performance_mode:
termcolor.cprint(
"Performance Mode is ON, we will ignore the Memory Tracking, WANDB Logging, and extra information "
"Process.",
color="red",
force_color=True
)
start_time = time.time()
sharded_state, shard_fns, gather_fns = self.initialize_state(
model_parameters=model_parameters,
state=state
)
count_model_parameters(sharded_state.params)
with self.mesh:
pbar = tqdm(total=self.max_training_steps)
current_step = int(jax.device_get(sharded_state.step))
loss_sum = None
accuracy_sum = None
pbar.update(sharded_state.step.tolist()) # type: ignore
if self.wandb_runtime is not None:
model_parameters_number = sum(
n.size for n in
jax.tree_util.tree_flatten(flax.core.unfreeze(sharded_state.params))[0]
) / 1e9
self.wandb_runtime.log(
{
"Number of Model Parameters (Billion)": model_parameters_number
}
)
wandb.summary["Number of Model Parameters (Billion)"] = model_parameters_number
try:
train_iter = iter(self.dataloader_train)
for epoch in range(self.arguments.num_train_epochs):
time_s = time.time()
for _ in range(self.max_training_steps // self.arguments.num_train_epochs):
try:
batch = next(train_iter)
except StopIteration:
train_iter = iter(self.dataloader_train)
batch = next(train_iter)
current_step += 1
if (
self.arguments.step_start_point is not None
and
self.arguments.step_start_point > current_step
):
pbar.update(1)
elif current_step < self.max_training_steps:
time_prev = time_s
time_s = time.time()
step_time = time_s - time_prev
for ssb in self.arguments.ids_to_pop_from_dataset:
_ = batch.pop(ssb, None)
(
sharded_state,
loss,
metrics,
) = self.sharded_train_step_function(sharded_state, batch)
trained_tokens = jnp.multiply(
self.arguments.max_sequence_length, jnp.multiply(
current_step,
self.arguments.total_batch_size
)
) # It's faster
with jax.spmd_mode("allow_all"):
calculating_metrics_start = time.time()
loss_sum = loss if loss_sum is None else loss_sum + loss
accuracy = metrics["accuracy"]
accuracy_sum = accuracy if accuracy_sum is None else accuracy_sum + accuracy
mean_loss = loss_sum / (current_step - self.arguments.step_start_point)
mean_accuracy = accuracy_sum / (current_step - self.arguments.step_start_point)
perplexity = jnp.exp(loss)
calculating_metrics_end = time.time()
train_metrics = {
"train/loss": loss.tolist(),
"train/mean_loss": mean_loss.tolist(),
"train/accuracy": accuracy,
"train/mean_accuracy": mean_accuracy.tolist(),
"train/learning_rate": self.scheduler(current_step).tolist(),
"train/step": current_step,
"train/step_time": step_time,
"train/perplexity": perplexity.tolist(),
"train/trained_tokens": trained_tokens,
"train/regularization_z_loss": metrics["regularization_z_loss"].tolist(),
"train/epoch": epoch,
}
if self.arguments.log_grad_norms:
train_metrics.update(
{
"train/max_grad_norm": metrics["max_grad_norm"].tolist(),
"train/mean_grad_norm": metrics["mean_grad_norm"].tolist(),
}
)
aux_loss = metrics.get("aux_loss", None)
if aux_loss is not None:
train_metrics.update(
{
"train/aux_loss": aux_loss.tolist()
}
)
pbar.update(1)
pbar.set_postfix(**{k.replace("train/", ""): v for k, v in train_metrics.items()})
if not self.arguments.performance_mode:
if self.arguments.log_grad_norms:
train_metrics.update({
f"grad_norm/{layer_name}": grad_norm.tolist()
for layer_name, grad_norm in get_layer_names(metrics["grad_norms"]).items()
})
train_metrics.update(
{
"time_cal/calculating_metrics_step_time": (
calculating_metrics_end - calculating_metrics_start
)
}
)
train_metrics.update(self.arguments.captured_memory)
if self.wandb_runtime is not None and not self.arguments.performance_mode:
with jax.spmd_mode("allow_all"):
self.wandb_runtime.log(train_metrics)
if self.arguments.training_time is not None:
if time.time() - start_time > self.arguments.training_time:
raise EasyDeLTimerError("Time Out")
else:
break
if self.arguments.save_steps is not None and current_step % self.arguments.save_steps == 0:
if self.rapture is None:
filename = self._save_state(
state=sharded_state,
gather_fns=gather_fns,
milestone=True
)
checkpoint_path = f"{str(self.arguments.get_path())}/{filename}"
else:
print(
termcolor.colored(
"Info : ", color="red", force_color=True
),
termcolor.colored(
"You can not use `save_steps` while using LoRA "
"right now. this action will be skipped", color="white", force_color=True
)
)
except KeyboardInterrupt:
termcolor.cprint(
"KeyboardInterrupt At training model Will return Current State of the Model with Parameters.",
color="cyan",
force_color=True
)
except EasyDeLTimerError:
termcolor.cprint(
"Training reached out maximum training Time Killing training Process "
"and Will return Current State of the Model with Parameters.",
color="cyan",
force_color=True
)
if self.arguments.merge_lora_rapture_parameters and self.rapture is not None:
print(
termcolor.colored(
"Info : ", color="red", force_color=True
),
termcolor.colored(
"Merging LoRA Parameters.", color="white", force_color=True
)
)
sharded_state = sharded_state.replace(
params=self.rapture.merge_parameters(sharded_state.params)
)
output = CausalLMTrainerOutput(
state=sharded_state,
mesh=self.mesh,
shard_fns=shard_fns,
gather_fns=gather_fns,
checkpoint_manager=self.checkpoint_manager,
)
if self.arguments.save_steps is None or self.arguments.do_last_save:
shard_fns, gather_fns = make_shard_and_gather_fns(
match_partition_rules(
self.config.get_partition_rules(
fully_sharded_data_parallel=self.arguments.fully_sharded_data_parallel
) if self.arguments.custom_rule is None else self.arguments.custom_rule,
jax.eval_shape(lambda: sharded_state)
),
dtype_specs=self.dtype
) # You have to re-init the new shard and gather functions in order to be able to skip LoRA weight
# crashing errors and saving errors
filename = self._save_state(
state=sharded_state,
gather_fns=gather_fns
)
checkpoint_path = f"{str(self.arguments.get_path())}/{filename}"
if self.arguments.do_eval:
for _ in self.eval(
sharded_state
):
...
output.checkpoint_path = checkpoint_path
output.last_save_file_name = filename
self.arguments._stop_capturing_memory = True
wandb.finish()
return output
def eval(self, model_state: EasyDeLState) -> typing.Iterator[dict]:
"""Evaluate the Given Model State and yield the eval metrics"""
assert self.dataloader_eval is not None, "`dataloader_eval` is required by evaluator function."
with self.mesh:
pbar = tqdm(total=self.max_evaluation_steps)
pbar.set_description("Evaluating")
current_step = 0
loss_sum = None
accuracy_sum = None
try:
eval_iter = iter(self.dataloader_eval)
for _ in range(self.max_evaluation_steps):
try:
batch = next(eval_iter)
except StopIteration:
eval_iter = iter(self.dataloader_eval)
batch = next(eval_iter)
current_step += 1
time_start = time.time()
for key in self.arguments.ids_to_pop_from_dataset:
_ = batch.pop(key, None)
metrics = self.sharded_eval_step_function(
model_state,
batch
)
total_time = time.time() - time_start
(
loss, accuracy, aux_loss
) = metrics
loss_sum = loss.tolist() if loss_sum is None else loss_sum + loss
accuracy_sum = (
accuracy.tolist() if (
accuracy_sum is None
) else accuracy_sum + accuracy
)
eval_metrics = {
"eval/loss": loss.tolist(),
"eval/mean_loss": loss_sum / (current_step - self.arguments.step_start_point),
"eval/mean_accuracy_sum": accuracy_sum / (
current_step - self.arguments.step_start_point
),
"eval/step": current_step,
"eval/step_time": total_time,
"eval/perplexity": jnp.exp(loss).tolist(),
}
if aux_loss is not None:
eval_metrics.update(
{"eval/aux_loss": aux_loss}
)
log_metrics = copy.deepcopy(eval_metrics)
eval_metrics.update(self.arguments.captured_memory)
if self.arguments.use_wandb:
with jax.spmd_mode("allow_all"):
self.wandb_runtime.log(
eval_metrics
)
pbar.update(1)
pbar.set_postfix(**{k.replace("eval/", ""): v for k, v in log_metrics.items()})
yield log_metrics
except KeyboardInterrupt:
termcolor.cprint(
"KeyboardInterrupt At Evaluation model Will return Nothing and just pass.",
color="cyan",
force_color=True
)
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