Hugging Face's logo
Ifigeneia Apostolopoulou's picture

Ifigeneia Apostolopoulou

ifaposto
1

AI & ML interests

approximate inference, probabilistic models, uncertainty quantification, generative models

Recent Activity

posted an update about 11 hours ago
Self-distillation methods usually rely on an Exponential Moving Average (EMA) teachers to get synced and stable critics. However, this doesn't scale well for large models since holding both teacher and student (trained) on GPU increases latency, zero3 communication, etc. We can mitigate this with LoRA finetuning: the backbone is shared & frozen, and we need to maintain two light adapters: one for the student (trained) and one for the teacher (EMA of the student adapter). Getting this to work cleanly under TRL and ZeRO-3 took some fixes, so I packaged it as a plug-and-play repo. It supports: -> robust SDFT implementation that runs under ZeRO-3 -> ZeRO-3 + LoRA integration with adapter switching for teacher/student passes -> Saving and resuming EMA teacher checkpoint -> working deepspeed configs that fix memory spikes when GPU memory is tight I tested on Qwen3.5 and ToolAlpaca. Repo: https://github.com/ifiaposto/sdft_zero3 Feedback/ more examples/ issues welcome!
posted an update 7 months ago
I’ve uploaded a minimal, self-contained implementation of manual autograd for a transformer-based classifier in PyTorch. It can help build intuition for what autograd is doing under the hood and is a useful hands-on reference for low-level differentiation in Transformer models, such as writing custom backward passes and tracing how gradients flow through attention blocks. 🐙 GitHub: https://github.com/ifiaposto/transformer_custom_autograd/tree/main 📓 Colab: https://colab.research.google.com/drive/1Lt7JDYG44p7YHJ76eRH_8QFOPkkoIwhn
new activity over 1 year ago
Qwen/Qwen2.5-7B-Instruct:ValueError: Unrecognized model in Qwen/Qwen2.5-7B-Instruct. Should have a `model_type` key in its config.json,
View all activity

Organizations

None yet