llama3_2_3B

Llama-3.2-3B-

This repository contains code to fine-tune the Llama-3.2-3B-Instruct model using Unsloth for efficient training. The model is optimized for conversational tasks and supports 4-bit quantization, LoRA adapters, and GGUF export.

Model Overview

• Base Model: Llama-3.2-3B-Instruct
• Fine-Tuning Dataset: FineTome-100k (converted to Llama-3.1 chat format)
• Features:
  • 4-bit quantization for reduced memory usage
  • LoRA adapters (1-10% parameter updates)
  • Sequence length: 2048 (RoPE scaling supported)
  • Optimized for Tesla T4 GPUs

🚀 Quick Start

Load this model as:

from llama_cpp import Llama
from huggingface_hub import hf_hub_download

# Download model from Hugging Face Hub
model_path = hf_hub_download(
    repo_id="Omarrran/llama3_2_3B",
    filename="unsloth.Q4_K_M.gguf",
    cache_dir="./models"  # Save to models directory
)

# Initialize LLM with proper configuration
llm = Llama(
    model_path=model_path,
    n_ctx=2048,  # Context window size
    n_threads=8,  # CPU threads to use
    n_gpu_layers=35  # GPU layers for acceleration (if available)
)

# Create a generation function
def generate_text(prompt, max_tokens=200):
    output = llm.create_chat_completion(
        messages=[{"role": "user", "content": prompt}],
        max_tokens=max_tokens,
        temperature=0.7,
        stop=["\n"]
    )
    return output['choices'][0]['message']['content']

# Example usage
if __name__ == "__main__":
    prompt = "Explain quantum computing in simple terms:"
    response = generate_text(prompt)
    print(f"Prompt: {prompt}\nResponse: {response}")

Installation

pip install unsloth
pip install --force-reinstall --no-cache-dir --no-deps git+https://github.com/unslothai/unsloth.git

Load Model

from unsloth import FastLanguageModel

model, tokenizer = FastLanguageModel.from_pretrained(
    model_name="unsloth/Llama-3.2-3B-Instruct",
    max_seq_length=2048,
    dtype=None,  # Auto-detect (bf16 for Ampere+ GPUs)
    load_in_4bit=True,
)

Run Inference

messages = [{"role": "user", "content": "Continue the Fibonacci sequence: 1, 1, 2, 3, 5, 8,"}]
inputs = tokenizer.apply_chat_template(messages, return_tensors="pt").to("cuda")

outputs = model.generate(
    inputs, 
    max_new_tokens=64,
    temperature=1.5,
    min_p=0.1,
)
print(tokenizer.decode(outputs[0]))

🛠️ Training

Data Preparation

The dataset is standardized to Llama-3.1 chat format:

from unsloth.chat_templates import get_chat_template, standardize_sharegpt

tokenizer = get_chat_template(tokenizer, "llama-3.1")  # Adds system prompts
dataset = load_dataset("mlabonne/FineTome-100k", split="train")
dataset = standardize_sharegpt(dataset)  # Converts to role/content format

LoRA Configuration

model = FastLanguageModel.get_peft_model(
    model,
    r=16,  # LoRA rank
    target_modules=["q_proj", "k_proj", "v_proj", "o_proj", "gate_proj", "up_proj", "down_proj"],
    lora_alpha=16,
    use_gradient_checkpointing="unsloth",  # 30% less VRAM
)

Training Arguments

from trl import SFTTrainer

trainer = SFTTrainer(
    model=model,
    train_dataset=dataset,
    dataset_text_field="text",
    max_seq_length=2048,
    args=TrainingArguments(
        per_device_train_batch_size=2,
        gradient_accumulation_steps=4,
        learning_rate=2e-4,
        max_steps=60,  # Demo: set to 60 steps. For full training, use num_train_epochs=1
        fp16=not is_bfloat16_supported(),
        bf16=is_bfloat16_supported(),
        optim="adamw_8bit",
    ),
)

💾 Saving & Deployment

Save LoRA Adapters

model.save_pretrained("llama3_2_3B")
tokenizer.save_pretrained("llama3_2_3B")

Export to GGUF (for llama.cpp)

model.save_pretrained_gguf(
    "model", 
    tokenizer,
    quantization_method="q4_k_m",  # Recommended quantization
)

Upload to Hugging Face Hub

model.push_to_hub_gguf(
    "your-username/llama3_2_3B",
    tokenizer,
    quantization_method=["q4_k_m", "q8_0"],  # Multiple formats
    token="hf_your_token_here",
)

📊 Performance

📜 Notes

• Knowledge Cutoff: December 2023 (updated to July 2024 via fine-tuning)
• Use temperature=1.5 and min_p=0.1 for best results (reference)
• For 2x faster inference, enable FastLanguageModel.for_inference(model)

🤝 Contributing

• Report issues
• Star the repo if you find this useful! ⭐

License

Apache 2.0. See [LICENSE on top of Model Card]

Key Fixes Added:

1. Model Download: Uses huggingface_hub to properly download the GGUF file
2. Correct Initialization: Uses Llama() constructor instead of non-existent from_pretrained()
3. GPU Support: Added n_gpu_layers for GPU acceleration (set to 0 if using CPU-only)
4. Chat Completion: Uses the recommended create_chat_completion method

Requirements:

pip install llama-cpp-python huggingface_hub

For Better Performance:

• Set n_gpu_layers based on your VRAM (40+ for large models)
• Add verbose=False to constructor to suppress logs
• Use llama.cpp optimizations:

  Llama(
      model_path=model_path,
      n_batch=512,
      use_mmap=True,
      use_mlock=True
  )
  

Common Errors to Handle:

try:
    llm = Llama(model_path=model_path)
except Exception as e:
    print(f"Error loading model: {str(e)}")
    # Check if file exists: os.path.exists(model_path)
    # Verify file integrity: check file size matches original