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--- |
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language: |
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- en |
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pipeline_tag: text-generation |
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license: apache-2.0 |
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license_link: https://www.apache.org/licenses/LICENSE-2.0 |
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--- |
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# Qwen2-1.5B-Instruct-quantized.w8a16 |
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## Model Overview |
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- **Model Architecture:** Qwen2 |
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- **Input:** Text |
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- **Output:** Text |
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- **Model Optimizations:** |
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- **Weight quantization:** INT8 |
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- **Intended Use Cases:** Intended for commercial and research use in English. Similarly to [Qwen2-1.5B-Instruct](https://huggingface.co/Qwen/Qwen2-1.5B-Instruct), this models is intended for assistant-like chat. |
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- **Out-of-scope:** Use in any manner that violates applicable laws or regulations (including trade compliance laws). Use in languages other than English. |
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- **Release Date:** 7/2/2024 |
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- **Version:** 1.0 |
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- **License(s):** [Apache-2.0](https://www.apache.org/licenses/LICENSE-2.0) |
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- **Model Developers:** Neural Magic |
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Quantized version of [Qwen2-1.5B-Instruct](https://huggingface.co/Qwen/Qwen2-1.5B-Instruct). |
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It achieves an average score of 55.38 on the [OpenLLM](https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard) benchmark (version 1), whereas the unquantized model achieves 55.17. |
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### Model Optimizations |
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This model was obtained by quantizing the weights of [Qwen2-1.5B-Instruct](https://huggingface.co/Qwen/Qwen2-1.5B-Instruct) to INT8 data type. |
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This optimization reduces the number of bits per parameter from 16 to 8, reducing the disk size and GPU memory requirements by approximately 50%. |
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Only the weights of the linear operators within transformers blocks are quantized. Symmetric per-channel quantization is applied, in which a linear scaling per output dimension maps the INT8 and floating point representations of the quantized weights. |
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[AutoGPTQ](https://github.com/AutoGPTQ/AutoGPTQ) is used for quantization with 1% damping factor and 256 sequences of 8,192 random tokens. |
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## Deployment |
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### Use with vLLM |
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This model can be deployed efficiently using the [vLLM](https://docs.vllm.ai/en/latest/) backend, as shown in the example below. |
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```python |
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from vllm import LLM, SamplingParams |
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from transformers import AutoTokenizer |
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model_id = "neuralmagic/Qwen2-1.5B-Instruct-quantized.w8a16" |
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number_gpus = 1 |
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sampling_params = SamplingParams(temperature=0.7, top_p=0.8, max_tokens=256) |
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tokenizer = AutoTokenizer.from_pretrained(model_id) |
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messages = [ |
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{"role": "system", "content": "You are a pirate chatbot who always responds in pirate speak!"}, |
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{"role": "user", "content": "Who are you?"}, |
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] |
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prompts = tokenizer.apply_chat_template(messages, add_generation_prompt=True, tokenize=False) |
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llm = LLM(model=model_id, tensor_parallel_size=number_gpus) |
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outputs = llm.generate(prompts, sampling_params) |
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generated_text = outputs[0].outputs[0].text |
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print(generated_text) |
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``` |
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vLLM aslo supports OpenAI-compatible serving. See the [documentation](https://docs.vllm.ai/en/latest/) for more details. |
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### Use with transformers |
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This model is supported by Transformers leveraging the integration with the [AutoGPTQ](https://github.com/AutoGPTQ/AutoGPTQ) data format. |
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The following example contemplates how the model can be used using the `generate()` function. |
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```python |
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from transformers import AutoTokenizer, AutoModelForCausalLM |
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model_id = "neuralmagic/Qwen2-1.5B-Instruct-quantized.w8a16" |
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tokenizer = AutoTokenizer.from_pretrained(model_id) |
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model = AutoModelForCausalLM.from_pretrained( |
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model_id, |
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torch_dtype="auto", |
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device_map="auto", |
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) |
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messages = [ |
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{"role": "system", "content": "You are a pirate chatbot who always responds in pirate speak!"}, |
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{"role": "user", "content": "Who are you?"}, |
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] |
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input_ids = tokenizer.apply_chat_template( |
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messages, |
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add_generation_prompt=True, |
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return_tensors="pt" |
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).to(model.device) |
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terminators = [ |
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tokenizer.eos_token_id, |
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tokenizer.convert_tokens_to_ids("<|eot_id|>") |
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] |
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outputs = model.generate( |
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input_ids, |
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max_new_tokens=256, |
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eos_token_id=terminators, |
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do_sample=True, |
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temperature=0.7, |
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top_p=0.8, |
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) |
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response = outputs[0][input_ids.shape[-1]:] |
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print(tokenizer.decode(response, skip_special_tokens=True)) |
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``` |
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## Creation |
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This model was created by applying the [AutoGPTQ](https://github.com/AutoGPTQ/AutoGPTQ) library as presented in the code snipet below. |
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Although AutoGPTQ was used for this particular model, Neural Magic is transitioning to using [llm-compressor](https://github.com/vllm-project/llm-compressor) which supports several quantization schemes and models not supported by AutoGPTQ. |
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```python |
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from transformers import AutoTokenizer |
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from auto_gptq import AutoGPTQForCausalLM, BaseQuantizeConfig |
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import random |
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model_id = "Qwen/Qwen2-1.5B-Instruct" |
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num_samples = 256 |
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max_seq_len = 8192 |
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tokenizer = AutoTokenizer.from_pretrained(model_id) |
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max_token_id = len(tokenizer.get_vocab()) - 1 |
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examples = [] |
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for _ in range(num_samples): |
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examples.append( |
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{ |
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"input_ids": [random.randint(0, max_token_id) for _ in range(max_seq_len)], |
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"attention_mask": max_seq_len*[1], |
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} |
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) |
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quantize_config = BaseQuantizeConfig( |
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bits=8, |
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group_size=-1, |
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desc_act=False, |
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model_file_base_name="model", |
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damp_percent=0.01, |
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) |
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model = AutoGPTQForCausalLM.from_pretrained( |
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model_id, |
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quantize_config, |
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device_map="auto", |
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) |
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model.quantize(examples) |
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model.save_pretrained("Qwen2-1.5B-Instruct-quantized.w8a16") |
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``` |
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## Evaluation |
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The model was evaluated on the [OpenLLM](https://huggingface.co/spaces/open-llm-leaderboard/open_llm_leaderboard) leaderboard tasks (version 1) with the [lm-evaluation-harness](https://github.com/EleutherAI/lm-evaluation-harness/tree/383bbd54bc621086e05aa1b030d8d4d5635b25e6) (commit 383bbd54bc621086e05aa1b030d8d4d5635b25e6) and the [vLLM](https://docs.vllm.ai/en/stable/) engine, using the following command: |
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``` |
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lm_eval \ |
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--model vllm \ |
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--model_args pretrained="neuralmagic/Qwen2-1.5B-Instruct-quantized.w8a16",dtype=auto,gpu_memory_utilization=0.4,add_bos_token=True,max_model_len=4096,tensor_parallel_size=1 \ |
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--tasks openllm \ |
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--batch_size auto |
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``` |
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### Accuracy |
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#### Open LLM Leaderboard evaluation scores |
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<table> |
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<tr> |
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<td><strong>Benchmark</strong> |
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</td> |
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<td><strong>Qwen2-1.5B-Instruct</strong> |
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</td> |
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<td><strong>Qwen2-1.5B-Instruct-quantized.w8a16 (this model)</strong> |
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</td> |
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<td><strong>Recovery</strong> |
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</td> |
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</tr> |
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<tr> |
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<td>MMLU (5-shot) |
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</td> |
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<td>55.65 |
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</td> |
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<td>56.08 |
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</td> |
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<td>100.8% |
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</td> |
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</tr> |
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<tr> |
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<td>ARC Challenge (25-shot) |
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</td> |
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<td>42.83 |
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</td> |
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<td>43.09 |
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</td> |
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<td>100.6% |
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</td> |
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</tr> |
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<tr> |
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<td>GSM-8K (5-shot, strict-match) |
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</td> |
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<td>58.07 |
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</td> |
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<td>58.00 |
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</td> |
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<td>99.9% |
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</td> |
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</tr> |
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<tr> |
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<td>Hellaswag (10-shot) |
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</td> |
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<td>67.43 |
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</td> |
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<td>67.44 |
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</td> |
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<td>100.0% |
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</td> |
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</tr> |
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<tr> |
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<td>Winogrande (5-shot) |
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</td> |
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<td>63.69 |
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</td> |
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<td>64.33 |
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</td> |
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<td>101.0% |
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</td> |
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</tr> |
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<tr> |
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<td>TruthfulQA (0-shot) |
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</td> |
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<td>43.34 |
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</td> |
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<td>43.38 |
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</td> |
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<td>100.1% |
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</td> |
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</tr> |
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<tr> |
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<td><strong>Average</strong> |
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</td> |
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<td><strong>55.17</strong> |
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</td> |
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<td><strong>55.38</strong> |
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</td> |
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<td><strong>100.4%</strong> |
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</td> |
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</tr> |
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</table> |
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