* [Feat] streaming multipack
* WIP make continued pretraining work w multipack
* fix up hadrcoding, lint
* fix dict check
* update test for updated pretraining multipack code
* fix hardcoded data collator fix for multipack pretraining
* fix the collator to be the max length for multipack pretraining
* don't bother with latest tag for test
* cleanup docker build/test
---------
Co-authored-by: jinwonkim93@github.com <jinwonkim>
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* fix: improved memory handling when model is bigger than existing VRAM
* feature: add lora_on_cpu flag to do LoRA loading on CPU (RAM)
For big models where the models are taking up the entire GPU VRAM, the LoRA part will fail unless it is loaded on CPU only.
* doc: add README
* fix: enable progress bars in do_merge_lora()
* doc: mention gpu_memory_limit and lora_on_cpu in merge part of README
* Update src/axolotl/utils/models.py
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* fix: remove deletion of removed model_kwargs key
* fix: validate that gpu_memory_limit and max_memory are not both set
---------
Co-authored-by: Karl-Johan Alm <kalle@gmail.com>
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* ipo-dpo trainer
* fix missing abstract method
* chatml template, grad checkpointing kwargs support
* fix steps calc for RL and add dataloader kwargs
* wip to fix dpo and start ppo
* more fixes
* refactor to generalize map fn
* fix dataset loop and handle argilla pref dataset
* set training args
* load reference model on seperate gpu if more than one device
* no auto upload to hub for dpo, don't add lora adapters to ref model for dpo
* fixes for rl training
* support for ipo from yaml
* set dpo training args from the config, add tests
* chore: lint
* set sequence_len for model in test
* add RLHF docs
* Added chatgml3 conversation type for training models like TinyLLama
* Added chatgml3 conversation type for training models like TinyLLama with lint
* Added chatgml3 conversation type for training models like TinyLLama with lint
* bump transformers and update attention class map name
* also run the tests in docker
* add mixtral e2e smoke test
* fix base name for docker image in test
* mixtral lora doesn't seem to work, at least check qlora
* add testcase for mixtral w sample packing
* check monkeypatch for flash attn multipack
* also run the e2e tests in docker
* use all gpus to run tests in docker ci
* use privileged mode too for docker w gpus
* rename the docker e2e actions for gh ci
* set privileged mode for docker and update mixtral model self attn check
* use fp16/bf16 for mixtral w fa2
* skip e2e tests on docker w gpus for now
* tests to validate mistral and mixtral patches
* fix rel import
* add config to model card
* rm space
* apply black formatting
* apply black formatting
* fix formatting
* check for cfg attribute
* add version
* add version
* put the config in a collapsible element
* put the config in a collapsible element
* Feat: Auto add to modules_to_save when adding tokens
* fix: swap to error instead of warning
* feat: add check when special_tokens differ and add test
* add torch to requirements.txt at build time to force version to stick
* fix xformers check
* better handling of xformers based on installed torch version
* fix for ci w/o torch
* start at index 0
* add test to check for missing turns
* apply black
* Update test_prompt_tokenizers.py
* Update src/axolotl/monkeypatch/fastchat_conversation_turns.py
Co-authored-by: Motoki Wu <tokestermw@gmail.com>
* fix linting
* apply black
* add more tests for llama/sharegpt
* make logic clearer
---------
Co-authored-by: Motoki Wu <tokestermw@gmail.com>
* fix: switch to using the HuggingFace Transformers NEFT implementation
* linter
* add support for noisy_embedding_alpha with a warning about it being renamed
* restore pre/posttrain_hooks
* move validation of NEFT noise alpha into validate_config()
* linter
* add check for zero3
* freeze parameters
* fixes for deepspeed loading
* fix model parameter check
* unfrozen parameters in example mixtral and logging when unfreezing
* Respect sequence_len in config for `type: llama2_chat`
It was hardcoded to `4096` I am not sure why? This updates it to pull from the config.
cc: @winglian
* Update llama2_chat.py
* apply black formatting
* fix tokenizer
* update test data
* lint fixtures
* mixtral multipack
* use mixtral model
* sample yml
* calculate cu_seqlens properly
* use updated flash ettention setting
* attn var checks
* force use of flash attention 2 for packing
* lint
* disable future fix for now
* update support table
* support for mamba
* more mamba fixes
* use fork for mamba kwargs fix
* grad checkpointing doesn't work
* fix extras for mamaba
* mamba loss fix
* use fp32 and remove verbose logging
* mamba fixes
* fix collator for mamba
* set model_type on training_args
* don't save safetensors for mamba
* update mamba config to disable safetensor checkpooints, install for tests
* no evals for mamba tests
* handle save_pretrained
* handle unused safetensors arg
* feat: add check for quantized model
* chore: refactor and add another check
* Update src/axolotl/utils/models.py
---------
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* Support device_map sequential (and others). Support max_memory in cfg.
* Update documentation in README accordingly.
* Update README.md
---------
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* Feat: Update to handle wandb env better
* chore: rename wandb_run_id to wandb_name
* feat: add new recommendation and update config
* fix: indent and pop disabled env if project passed
* feat: test env set for wandb and recommendation
* feat: update to use wandb_name and allow id
* chore: add info to readme
* Determine FSDP/deepspeed settings on device select.
Without this, the OS env check for accelerate will fail.
* rename and move env setup call
* chore: lint
---------
Co-authored-by: Karl-Johan Alm <kalle@gmail.com>
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* add phi modeling from hf
* update for packing and use new modeling class for phi
* update e2e tests for phi to use new model name
* update example phi to also use new phi model name
* use AutoModelForCausalLM for phi lora since sample packing isn't supported
* allow zero len dataset
* better handling and warning of small eval splits
* raise error if eval split is too small
* don't mess with calculating total num steps in distributed context
* fix eval_sample_packing training args logic
* isolate torch from the requirements.txt
* fix typo for removed line ending
* pin transformers and accelerate to latest releases
* try w auto-gptq==0.5.1
* update README to remove manual peft install
* pin xformers to 0.0.22
* bump flash-attn to 2.3.3
* pin flash attn to exact version
* allow overriding of model_config parameters from the YML
* remove old logging, update readme
* move the updating of model config to the load_model_config function
* add warning for deprecated rope_scaling in the root of the YML config
* use tensorboard to see if resume from checkpoint works
* make sure e2e test is either fp16 or bf16
* set max_steps and save limit so we have the checkpoint when testing resuming
* fix test parameters
* Update data.py
Change of conversation formatting type should also trigger updating the preprocessed dataset, so it should be part of the signature.
* chore: lint
---------
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* various bugfixes
use latest tinyllama release
check if val_set_size is empty first
update sdp and xformers llama patches for updated upstream transformers
fix system prompt when no input
calculate total and total supervised tokens even when not sample packing
* add fix for when eval size is estimated to be too small
* should be len 1 for dataset length
* add catchall kwargs
* test batch sampler w varying batch lens
* wip
* multipack batchsampler wip
* wip
* fix for prepare data loader to get correct # of steps based on gpues
* lint and clean up
* calculate len estimate
* fix total num steps calc
* add options for dataloader_num_workers and dataloader_pin_memory
* remove gitbook
* support prefetch_factor for dataloader optimization
* fix the kwarg
* Update to adapt to sharegpt datasets with "assistant" rather than "gpt" as the machine answers.
* use a strict option for hanedling incorrect turn data
* chore: lint
---------
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* Update zero3.json
Take away CPU Offload by default (Slows things down horribly, better off reducing batchsize), and changes LR Scheduler to a properly decaying one
* Update zero3.json
fix something
* support for sharegpt with assistant talking first, better masking of assistant token, allow remap of roles from dataset
* invalid role is actually not possible
* update tokenized fixture for corrected labels
* Update README with some explanations
* revert commit-hook change
* add more explanation about batch size and gradient accum
* not use latex foromat
* decorate
* git hook again
* Attach a link that explains about LoRA hyperparameters
* update table of content
* Explanation about lora_modules_to_save
* Adding qlora config for Mistral
Contains fix for Mistral FA issue - ValueError: You are attempting to perform batched generation with padding_side='right' this may lead to unexpected behaviour for Flash Attention version of Mistral. Make sure to call tokenizer.padding_side = 'left' before tokenizing the input.
Fix for now is to set sample_packing: true and pad_to_sequence_len: true
* Renamed to qlora.yml
* Allow usage of native Mistral FA when no sample_packing
* fix: do not apply custom patch when sample_pack off
* chore: lint
* chore: pin transformer to v4.35.0.dev0
* fix: split sample_packing to separate test
I'm using the Axolotl script to train models on https://modal.com serverless GPUs. Unfortunately, their environment seems to have some kind of bug where if I try to run `datasets.filter` with too high a `num_proc`, it throws an error and dies.
This PR adds a new configuration option `dataset_processes`, which lets you explicitly set the number of processes used to map/filter the dataset. If not included, this defaults to the current behavior of setting that to `os.cpu_count()`.
* Fix(cfg): Check save_strategy cfg conflict with save_steps
* Fix(cfg): Check evaluation_strategy cfg conflict with eval_steps
* chore: add extra check for steps only
* add mistral monkeypatch
* add arg for decoder attention masl
* fix lint for duplicate code
* make sure to update transformers too
* tweak install for e2e
* move mistral patch to conditional
* Fix bug in dataset loading
This fixes a bug when loading datasets. `d.data_files` is a list, so it cannot be directly passed to `hf_hub_download`
* Check type of data_files, and load accordingly
* use fastchat conversations template
* require fastchat (fschat) pip install
* handle roles dynamically from conversation
* tweak fastchat conversation with a monkeypatch to get individual turns
* fix up so it works with multiple conversation styles, and don't strip the turns
* fix sharegpt fixture now that we're using a more correct tokenization
* use a new prompter and support fastchat conversation type
* use sharegpt from prompt strategies now
* update docs, add chatml template
* add a newline after im_end token
* ensure we correctly set system message
* update per PR feedback to handle deprecated sharegpt types
* don't add duplicate wandb req
* make sharegpt fields configurable from yml
* llama2 fixes
* don't fail fatally when turns are improper
* attention_mask not needed for training
* specifically don't use attention mask for phi
* use a different check for phi
* small fixes since phi removed some values from their config
* Feat: Add support for upstream FA2
* chore: add is_falcon_derived_model: true to examples
* chore: add config to readme for documentation
* feat: add extra model types
* fix: remove old falcon flash patch
* chore: pin transformers and accelerate
* skip the gpu memory checks if the device is set to 'auto'
* skip gpu mem logging if cpu too
* don't worry about log_gpu_memory_usage since it calls another annotated fn
* rename decorator internal
* more sane defaults for openllama 3b used for quickstarts
* don't use bf16 for quickstart to simplify gpu compatibility
* use the update openlm-research/open_llama_3b_v2 models
* phi sequence packing
* sample packing fixes
* fix linting
* fix inference and phi e2e tests
* update phi example now that sample packing works
* wandb import keeps getting moved around
* run e2e tests after all other checks have passed
* tweak tests so they get run on PRs or push to main
* change dependent action for chcecking
* one test workflow to rule them all
* no need for custom action, just use needs
* whoops, python version should be a string
* e2e tests can run on any available gpu
* let hf trainer handle torch compile
* remove torch compile checks, include option for backend
* suppress torch errors to get further
* require min torch version of 2.1.0 for torch compile to work
---------
Co-authored-by: Aman Karmani <aman@tmm1.net>
* return without packing prep/len
* fix remove columns
* fix encode arguments
* add error when max steps not set
* fix test
---------
Co-authored-by: Jan Philipp Harries <jphme@users.noreply.github.com>
* update readme to point to direct link to runpod template, cleanup install instrucitons
* default install flash-attn and auto-gptq now too
* update readme w flash-attn extra
* fix version in setup
* set early stopping metric to check
* tweak how load_best_model_at_end gets set for early stopping
* add validation for earl;y stopping patience
* remove negation
* save results to metrics in callback
* move early stopping callback after the benchmark evals
* broadcast metrics so early stopping works
* auto gptq support
* more tweaks and add yml
* remove old gptq docker
* don't need explicit peft install for tests
* fix setup.py to use extra index url
install torch for tests
fix cuda version for autogptq index
set torch in requirements so that it installs properly
move gptq install around to work with github cicd
* gptq doesn't play well with sample packing
* address pr feedback
* remove torch install for now
* set quantization_config from model config
* Fix the implementation for getting quant config from model config
* use flash_attn xentropy when available
* use flash_attn.ops.rms_norm when available
* log when xentropy is not found
* log how to install RMSNorm
* add quotes so pip install works
* fix: bad dtype for full finetune
* Update src/axolotl/utils/models.py
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* Update models.py
---------
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* Added "eval_" prefix
* Added total bench accuracy and renamed the previous one to bench_average_accuracy. Changed naming to use bench_split instead of always using eval_ prefix.
* add mmlu callback
* use hf dataset for mmlu evals
* default to mmlu-zs
* make sure to define all the explicit positional args
* include metrics in callback
* another callback fix for collator max len attribute
* fix mmlu evals
* sample benchmarks, ensure we drop long samples
* fix the data file
* fix elif and add better messaging
* more fixes
* rename mmlu to bench
* more fixes
* dataset handling and aggregate across benchmark
* better handling when no subjects
* benchmark callback has its own dataloader and collator
* fixes
* updated dataset
* more fixes
* missing transformers import
* improve support for customized dataset for bench evals
* gather benchmarks from all ranks
* fix for gather across multiple gpus
* Add Metharme tokenizing strategy
This strategy accounts for how the Metharme JSONLs are formatted as well as adds duplicated EOS tokens which can help trim model output length.
I haven't gotten the chance to test this yet, and probably won't have the chance for quite a bit, so I'm committing this now.
* Redo Metharme tokenizing strategy
lol
* fix: oops
* Rearrange a conditional
* chore: reformat code in accordance with linter
* chore: Make lint not freak out
* chore: fix lint
---------
Co-authored-by: NanoCode012 <kevinvong@rocketmail.com>
* recast loralayer, norm, lmhead + embed token weights per original qlora
* try again for the fix
* refactor torch dtype picking
* linter fixes
* missing import for LoraLayer
* fix install for tests now that peft is involved
* support user defined prompters, pretokenized datasets in config, local parquet, local arrow files
* fix user defined dataset types
* fix for system prompts
* fix tests
* fix checks for parquet and arrow
* aha moment that d.data_files isn't used
* add documentation for ds_type to add support for parquet and arrow
* flash attn pip
* add packaging
* add packaging to apt get
* install flash attn in dockerfile
* remove unused whls
* add wheel
* clean up pr
fix packaging requirement for ci
upgrade pip for ci
skip build isolation for requiremnents to get flash-attn working
install flash-attn seperately
* install wheel for ci
* no flash-attn for basic cicd
* install flash-attn as pip extras
---------
Co-authored-by: Ubuntu <mgh@mgh-vm.wsyvwcia0jxedeyrchqg425tpb.ax.internal.cloudapp.net>
Co-authored-by: mhenrichsen <some_email@hey.com>
Co-authored-by: Mads Henrichsen <mads@BrbartiendeMads.lan>
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* split sdp attn into its own patch
* sync xformers patch to follow shared format and be diffable
* update flash-attn patch for 70B/GQA and inference using helper from flash-attn tests
* speed up flash-attn inference
* fix patch to check position ids and don't use multipack for evals
* copy LlamaModel.forward and LlamaDecoderLayer.forward into monkeypatch
* update forwards so we only calculate cu_seqlens once
* enable eval dataloader using multipack again
* fix the patch to work properly and work with FSDP
---------
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* Fix(template): Inform to place stack trace to Issue
* Update following suggestions
Co-authored-by: Wing Lian <wing.lian@gmail.com>
---------
Co-authored-by: Wing Lian <wing.lian@gmail.com>
* fix attetion mask with packing
* set position ids and use block diagonal attn mask
* fix expand mask for multiple batch items, make sure we pad position_ids
* don't move masks to cpu
* use multi pack dataloader w random sampler
* add position_ids back
* more fixes for dataloader integration
* est total tokens, fix field loop
* more fixes, position_ids seems broken
* more fixes for sample packing
* use distributed sampler, avoid accelerate prepare
* use accelerator prepare for dataloader
* fix for position_ids w packing
* Update src/axolotl/utils/dataloader.py
* validation for sample packing and doc
* more fixes for 4k and optimizations
* optimized expand mask fn
* better handling of variance in multipack dataloader length and trainer hanging when it runs out of data
* fix rounding of len of batches to int
* better handling so that all devices have the same dataloader len
* fix step calc for packing
* pass sample packing efficiency to training args
* add a test for the mask expansion for sequence packing
* only process eval dataset for packing if not None
* don't split batches when packing
* weighted CE losses
* weighted CEL fixes
* limit packing to sequences of max seq len
* seq_len_multiple for packing
* make sure the chunk size is an int
* sample_packing_seq_len_multiplier config
* use cumulative seq len with var len flash attn v2 w packing
* properly calculate max len
* fix flash-attn, xformers, packing, support chatml
* fix chatml system prompt for openorca, legacy tokenizer opts
* add chatml
* add unit tests for cum seq lens, add ability to build cu_seq_lens from positional ids, fix prompt test
* fix test and pylint checks
* more packing and dataset optimizations and fixes
* filter w multiple cpus
* more fixes and optimizations
* fixes and go back to distributed sampler since batch sampler won't work
* fix counts by accounting for num devices
* fix steps calculation
* previous accelerate is still most performant
* add numba to requirements.
* use custom distributed checks
* fix sampler to prevent overfit w new epochs
* let's not cleanup the cached datasets
* calculate cum seq lens with pos_ids instead of mask, simplify packing params, fix distributed barrier
* speed optimizations and set accelerate fsdp env vars
* optimize dataset concatenation?
* more optimizations for dataset handling
* fix import for annotation
* manual pre-commit fixes
* another sum optimization and bug fix for calc steps
* fix packing estimations
* fix formatting
* pylint problems
* add back flash attention branch for handling unpacked sequences seperately
* Address PR feedback
* add optional sample packing config params to readme
* experimental llama 2 chat support
* few small fixes
* llama2_chat
* small fix to follow original implementation
* small fixes and added fixtures/tests
* fix -mixed up inference and finetuning conversations
* args - small fix
* small fix
* small adjustment and warning
* fix with pre-commit
---------
Co-authored-by: Jan Philipp Harries <jpdus@users.noreply.github.com>
* Fix XFormers attention for Llama-2 70B (GQA)
Updated XFormers MonkeyPatch to handle GQA as used in Llama-2 70B. All the updated code is taken directly from the Transformers library: 07360b6c9c (diff-06392bad3b9e97be9ade60d4ac46f73b6809388f4d507c2ba1384ab872711c51) from their llama_modeling.py file.
* Catch configs without pretraining_tp
* Whitespace bug fix
Command had accidentally been moved out of if-else block.
* pre-commit formatting fixes
Thanks to @winglian
* drop cuda117/torch 1.13.1 from support, pin flash attention to v2.0.1, rm torchvision/torchaudio install
* gptq base build not needed. add sm 9.0 support
Update FAQS.md with the following statement
Error invalid argument at line 359 in file /workspace/bitsandbytes/csrc/pythonInterface.c
/arrow/cpp/src/arrow/filesystem/s3fs.cc:2598: arrow::fs::FinalizeS3 was not called even though S3 was initialized. This could lead to a segmentation fault at exit
try reinstalling bitsandbytes and transformers from source
Previously the readme stated gradient checkpointing was incompatible with 4-bit lora in the current implementation however this is no longer the case. I have replaced the warning with a link to the hugging face documentation on gradient checkpointing.
When training with Lora, and starting with an existing lora weights, current code produces a model with 0 trainable params and training can't work.
Adding the "is_trainable" param allows the loaded peft to be trained and fixes the bug.
First of all, thank you for your interest in contributing to axolotl! We appreciate the time and effort you're willing to invest in making our project better. This document provides guidelines and information to make the contribution process as smooth as possible.
All contributors are expected to adhere to our [Code of Conduct](CODE_OF_CONDUCT.md). Please read it before participating in the axolotl community.
## Getting Started
Bugs? Please check for open issue else create a new [Issue](https://github.com/OpenAccess-AI-Collective/axolotl/issues/new).
PRs are **greatly welcome**!
1. Fork the repository and clone it to your local machine.
2. Set up the development environment by following the instructions in the [README.md](https://github.com/OpenAccess-AI-Collective/axolotl/tree/main/README.md) file.
3. Explore the codebase, run tests, and verify that everything works as expected.
If you encounter a bug or issue while using axolotl, please open a new issue on the [GitHub Issues](https://github.com/OpenAccess-AI-Collective/axolotl/issues) page. Provide a clear and concise description of the problem, steps to reproduce it, and any relevant error messages or logs.
### Suggesting Enhancements
We welcome ideas for improvements and new features. To suggest an enhancement, open a new issue on the [GitHub Issues](https://github.com/OpenAccess-AI-Collective/axolotl/issues) page. Describe the enhancement in detail, explain the use case, and outline the benefits it would bring to the project.
### Submitting Pull Requests
1. Create a new branch for your feature or bugfix. Use a descriptive name like `feature/your-feature-name` or `fix/your-bugfix-name`.
2. Make your changes, following the [Style Guidelines](#style-guidelines) below.
3. Test your changes and ensure that they don't introduce new issues or break existing functionality.
4. Commit your changes, following the [commit message guidelines](#commit-messages).
5. Push your branch to your fork on GitHub.
6. Open a new pull request against the `main` branch of the axolotl repository. Include a clear and concise description of your changes, referencing any related issues.
## Style Guidelines
### Code Style
axolotl uses [{codestyle}]({URLofCodestyle}) as its code style guide. Please ensure that your code follows these guidelines.
### Commit Messages
Write clear and concise commit messages that briefly describe the changes made in each commit. Use the imperative mood and start with a capitalized verb, e.g., "Add new feature" or "Fix bug in function".
Thank you once again for your interest in contributing to axolotl. We look forward to collaborating with you and creating an even better project together!
description:Suggest a new feature or feature enhancement for the project
labels:["enhancement","needs triage"]
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description:"There are two locations for previous feature requests. Please search in both. Thank you. The **Label filters** may help make your search more focussed."
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Due to the nature of the fast development that is happening in this project, only the latest released version can be supported.
## Reporting a Vulnerability
If you find a vulnerability, please contact us on [Discord](https://discord.gg/xcu3ECkH9a) rather than creating a GitHub issue to allow us some time to fix it before it is a known vulnerability to others.
If you need help with this project or have questions, please:
1. Check the documentation.
2. Search the existing issues and pull requests.
3. Create a new issue if your question is not answered or your problem is not solved.
4. Have a look in the [Discord server](https://discord.gg/HhrNrHJPRb)
Please note that this project is maintained by volunteers who have limited availability. We'll do our best to address your questions and concerns in a timely manner.
- Can you train StableLM with this? Yes, but only with a single GPU atm. Multi GPU support is coming soon! Just waiting on this [PR](https://github.com/huggingface/transformers/pull/22874)
- Will this work with Deepspeed? That's still a WIP, but setting `export ACCELERATE_USE_DEEPSPEED=true` should work in some cases
-`Error invalid argument at line 359 in file /workspace/bitsandbytes/csrc/pythonInterface.c`
`/arrow/cpp/src/arrow/filesystem/s3fs.cc:2598: arrow::fs::FinalizeS3 was not called even though S3 was initialized.`
This could lead to a segmentation fault at exit. Try reinstalling bitsandbytes and transformers from source.
You will need to create a configuration for accelerate, either by using `accelerate config` and follow the instructions or you can use one of the preset below:
On each machine you need a copy of Axolotl, we suggest using the same commit to ensure compatibility.
You will also need to have the same configuration file for your model on each machine.
On the main machine only, make sure the port you set as `main_process_port` is open in TCP and reachable by other machines.
All you have to do now is launch using accelerate as you would usually do on each machine and voila, the processes will start once you have launched accelerate on every machine.
NVIDIA NCCL is a library to facilitate and optimize multi-GPU communication operations, such as broadcast, all-gather, reduce, all-reduce, etc. Broadly, NCCL configuration is highly environment-specific and is configured via several [environment variables](https://docs.nvidia.com/deeplearning/nccl/user-guide/docs/env.html). A common NCCL-related problem occurs when a long-running operation times out causing the training process to abort:
```text
Watchdog caught collective operation timeout: WorkNCCL(SeqNum=42, OpType=ALLGATHER, Timeout(ms)=1800000) ran for 1806948 milliseconds before timing out.
```
Often, this timeout will happen after 30 minutes (the default setting) and is accompanied by below-average power consumption with near 100% GPU utilization before the error is raised. Nvidia recommends [disabling PCI access control services (ACS)](https://docs.nvidia.com/deeplearning/nccl/user-guide/docs/troubleshooting.html#pci-access-control-services-acs) as a possible solution if this is available to you.
Forcing cross-GPU communication via [NVLink](https://en.wikipedia.org/wiki/NVLink) may help without increasing timeouts. To verify that your configuration is leveraging NVLink run the following command:
```shell
nvidia-smi nvlink --status
```
To force NCCL to use NVLink, simply set this in the environment:
```shell
exportNCCL_P2P_LEVEL=NVL
```
If NVLink is not available in your environment there are other options for ``NCCL_P2P_LEVEL`` in the table below:
| NCCL_P2P_LEVEL | Description |
| -------------- | ----------- |
| PIX | P2P data transfers through no more than a single PCIe bridge. Faster data transfer rates vs to paths involving multiple bridges, but slower compared to direct GPU-to-GPU communication. |
| PXB | P2P data transfers through multiple PCIe bridges but not going through the PCIe Host Bridge; this path involves a complex routing process, potentially incurring a moderate level of latency. |
| PHB | P2P data transfers occur over the PCIe and through a PCIe Host Bridge, typically involving the CPU, which can facilitate direct memory access but might introduce additional latency compared to more direct paths (ex PIX, NVL) |
To validate that acceptable data transfer speeds exist for your training job, running [NCCL Tests](https://github.com/NVIDIA/nccl-tests/blob/master/README.md) can help pinpoint bottlenecks, for example:
```shell
./build/all_reduce_perf -b 8 -e 128M -f 2 -g 3
```
It can be useful when debugging NCCL communication timeouts to activate additional logging in both PyTorch and NCCL:
Finally, if you believe your training job needs more time you can increase the timeout past 30 minutes by setting the ``ddp_timeout`` value in the Axolotl configuration. See [PyTorch init_process_group](https://pytorch.org/docs/stable/distributed.html#torch.distributed.init_process_group) for documentation on this value.
Reinforcement Learning from Human Feedback is a method whereby a language model is optimized from data using human
feedback. Various methods include, but not limited to:
- Proximal Policy Optimization (PPO) (not yet supported in axolotl)
- Direct Preference Optimization (DPO)
- Identity Preference Optimization (IPO)
### RLHF using Axolotl
[!IMPORTANT]
This is a BETA feature and many features are not fully implemented. You are encouraged to open new PRs to improve the integration and functionality.
The various RL training methods are implemented in trl and wrapped via axolotl. Below are various examples with how you can use various preference datasets to train models that use ChatML
This is an example of CodeLLaMA configuration for 7b, 13b and 34b.
The 7b variant fits on any 24GB VRAM GPU and will take up about 17 GB of VRAM during training if using qlora and 20 GB if using lora. On a RTX 4090 it trains 3 epochs of the default dataset in about 15 minutes.
The 13b variant will fit if you change these settings to these values:
gradient_accumulation_steps: 2
micro_batch_size: 1
The 34b variant does not fit on 24GB of VRAM - you will need something with +40 gb VRAM that also supports flash attention v2 - A6000 or A100 are good choices.
This is an example of a llama-2 configuration for 7b and 13b. The yaml file contains configuration for the 7b variant, but you can just aswell use the same settings for 13b.
The 7b variant fits on any 24GB VRAM GPU and will take up about 17 GB of VRAM during training if using qlora and 20 GB if using lora. On a RTX 4090 it trains 3 epochs of the default dataset in about 15 minutes.
The 13b variant will fit if you change these settings to these values:
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