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# Helpful Utilities

Below are a variety of utility functions that 🤗 Accelerate provides, broken down by use-case. 

## Data Classes

These are basic dataclasses used throughout 🤗 Accelerate and they can be passed in as parameters.

[[autodoc]] utils.DistributedType

[[autodoc]] utils.LoggerType

[[autodoc]] utils.PrecisionType

[[autodoc]] utils.ProjectConfiguration

## Data Manipulation and Operations

These include data operations that mimic the same `torch` ops but can be used on distributed processes.

[[autodoc]] utils.broadcast

[[autodoc]] utils.concatenate

[[autodoc]] utils.gather

[[autodoc]] utils.pad_across_processes

[[autodoc]] utils.reduce

[[autodoc]] utils.send_to_device

## Environment Checks

These functionalities check the state of the current working environment including information about the operating system itself, what it can support, and if particular dependencies are installed. 

[[autodoc]] utils.is_bf16_available

[[autodoc]] utils.is_torch_version

[[autodoc]] utils.is_tpu_available

## Environment Configuration

[[autodoc]] utils.write_basic_config

When setting up 🤗 Accelerate for the first time, rather than running `accelerate config` [~utils.write_basic_config] can be used as an alternative for quick configuration.

## Memory

[[autodoc]] utils.get_max_memory

[[autodoc]] utils.find_executable_batch_size

## Modeling

These utilities relate to interacting with PyTorch models

[[autodoc]] utils.extract_model_from_parallel

[[autodoc]] utils.get_max_layer_size

[[autodoc]] utils.offload_state_dict


## Parallel

These include general utilities that should be used when working in parallel.

[[autodoc]] utils.extract_model_from_parallel

[[autodoc]] utils.save

[[autodoc]] utils.wait_for_everyone


## Random

These utilities relate to setting and synchronizing of all the random states.

[[autodoc]] utils.set_seed

[[autodoc]] utils.synchronize_rng_state

[[autodoc]] utils.synchronize_rng_states


## PyTorch XLA

These include utilities that are useful while using PyTorch with XLA.

[[autodoc]] utils.install_xla