PPO ile ince ayar

Eğiticiyi başlattıktan sonra, şimdi modeli ince ayar yapmak için döngüyü başlatman gerekiyor.

Ödül eğiticisi ppo_trainer, trl Python kütüphanesindeki PPOTrainer sınıfı kullanılarak başlatıldı.

Bu egzersiz, kursun bir parçasıdır

İnsan Geri Bildiriminden Pekiştirmeli Öğrenme (RLHF)

Kursa Göz Atın

Egzersiz talimatları

PPO döngüsü içinde, girdi kimliklerini (input ids) ve eğiticiyi kullanarak yanıt tensörleri üret.
Sorgular, yanıt ve ödül verilerini kullanarak PPO modelini optimize eden PPO döngüsündeki adımı tamamla.

Uygulamalı etkileşimli egzersiz

Bu egzersizi bu örnek kodu tamamlayarak deneyin.

for batch in tqdm(ppo_trainer.dataloader): 

    # Generate responses for the given queries using the trainer
    response_tensors = ____(batch["input_ids"])

    batch["response"] = [tokenizer.decode(r.squeeze()) for r in response_tensors]

    texts = [q + r for q, r in zip(batch["query"], batch["response"])]

    rewards = reward_model(texts)

    # Training PPO step with the query, responses ids, and rewards
    stats = ____(batch["input_ids"], response_tensors, rewards)

    ppo_trainer.log_stats(stats, batch, rewards)

Kodu Düzenle ve Çalıştır

Bu egzersiz, kursun bir parçasıdır

İnsan Geri Bildiriminden Pekiştirmeli Öğrenme (RLHF)

AvançadoNível de habilidade

4.8+

Kursa Ücretsiz Başla

This chapter introduces the basics of Reinforcement Learning with Human Feedback (RLHF), a technique that uses human input to help AI models learn more effectively. Get started with RLHF by understanding how it differs from traditional reinforcement learning and why human feedback can enhance AI performance in various domains.

Exercise 1: Introduction to RLHF Exercise 2: Text generation with RLHF Exercise 3: Classifying generated text for RLHF Exercise 4: RL vs. RLHF Exercise 5: Exploring pre-trained LLMs Exercise 6: Tokenize a text dataset Exercise 7: Fine-tuning for review classification Exercise 8: Preparing data for RLHF Exercise 9: Preparing the preference dataset Exercise 10: Extracting prompts

Discover how to set up systems for gathering human feedback in this Chapter. Learn best practices for collecting high-quality data, from pairwise comparisons to uncertainty sampling, and explore strategies for enhancing your data collection.

Exercise 1: Methods for high-quality feedback gathering Exercise 2: Understanding comparison and rating in RLHF Exercise 3: Comparing slogans for a gym campaign Exercise 4: Measuring feedback quality and relevance Exercise 5: Low confidence Exercise 6: K-means for feedback clustering Exercise 7: Active learning Exercise 8: Implementing an active learning pipeline Exercise 9: Active learning loop

In this Chapter, you'll get into the core of Reinforcement Learning from Human Feedback training. This includes exploring fine-tuning with PPO, techniques to train efficiently, and handling potential divergences from your metrics' objectives.

Exercise 1: Ödül modellerine derin bakış Exercise 2: Ödülü başlatma Exercise 3: Ödül eğitmenini ayarlama Exercise 4: PPO ile eğitim Exercise 5: PPO eğitmenini başlat Exercise 6: PPO ile ince ayar

Geçerli egzersiz

Exercise 7: RLHF'te verimli ince ayar Exercise 8: 8-bit Eğitime Hazırlık Exercise 9: LoRA ile eğit

Explore key techniques for assessing and improving model performance in this last Chapter of Reinforcement Learning from Human Feedback (RLHF): from fine-tuning metrics to incorporating diverse feedback sources, you'll be provided with a comprehensive toolkit to refine your models effectively.

Exercise 1: Model metrics and adjustments Exercise 2: Mitigating negative KL divergence Exercise 3: Checking the reward model Exercise 4: Incorporating diverse feedback sources Exercise 5: Majority voting on multiple data sources Exercise 6: Unreliable data source identification Exercise 7: Evaluating RLHF models Exercise 8: Interpreting curves Exercise 9: Evaluating RLHF with metrics Exercise 10: Wrapping up your RLHF journey