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# Quark[[quark]]
[Quark](https://quark.docs.amd.com/latest/)는 특정 데이터 타입, 알고리즘, 하드웨어에 구애받지 않도록 설계된 딥러닝 양자화 툴킷입니다. Quark에서는 다양한 전처리 전략, 알고리즘, 데이터 타입을 조합하여 사용할 수 있습니다.
🤗 Transformers를 통해 통합된 PyTorch 지원은 주로 AMD CPU 및 GPU를 대상으로 하며, 주로 평가 목적으로 사용됩니다. 예를 들어, [lm-evaluation-harness](https://github.com/EleutherAI/lm-evaluation-harness)를 🤗 Transformers 백엔드와 함께 사용하여 Quark로 양자화된 다양한 모델을 원활하게 평가할 수 있습니다.
Quark에 관심이 있는 사용자는 [문서](https://quark.docs.amd.com/latest/)를 참고하여 모델 양자화를 시작하고 지원되는 오픈 소스 라이브러리에서 사용할 수 있습니다!
Quark는 자체 체크포인트/[설정 포맷](https://huggingface.co/amd/Llama-3.1-8B-Instruct-FP8-KV-Quark-test/blob/main/config.json#L26)를 가지고 있지만, 다른 양자화/런타임 구현체 ([AutoAWQ](https://huggingface.co/docs/transformers/quantization/awq), [네이티브 fp8](https://huggingface.co/docs/transformers/quantization/finegrained_fp8))와 호환되는 직렬화 레이아웃으로 모델을 생성하는 것도 지원합니다.
Transformer에서 Quark 양자화 모델을 로드하려면 먼저 라이브러리를 설치해야 합니다:
```bash
pip install amd-quark
```
## 지원 매트릭스[[Support matrix]]
Quark를 통해 양자화된 모델은 함께 조합할 수 있는 광범위한 기능을 지원합니다. 구성에 관계없이 모든 양자화된 모델은 `PretrainedModel.from_pretrained`를 통해 원활하게 다시 로드할 수 있습니다.
아래 표는 Quark에서 지원하는 몇 가지 기능을 보여줍니다:
| **기능** | **Quark에서 지원하는 항목** | |
|---------------------------------|-----------------------------------------------------------------------------------------------------------|---|
| 데이터 타입 | int8, int4, int2, bfloat16, float16, fp8_e5m2, fp8_e4m3, fp6_e3m2, fp6_e2m3, fp4, OCP MX, MX6, MX9, bfp16 | |
| 양자화 전 모델 변환 | SmoothQuant, QuaRot, SpinQuant, AWQ | |
| 양자화 알고리즘 | GPTQ | |
| 지원 연산자 | ``nn.Linear``, ``nn.Conv2d``, ``nn.ConvTranspose2d``, ``nn.Embedding``, ``nn.EmbeddingBag`` | |
| 세분성(Granularity) | per-tensor, per-channel, per-block, per-layer, per-layer type | |
| KV 캐시 | fp8 | |
| 활성화 캘리브레이션 | MinMax / Percentile / MSE | |
| 양자화 전략 | weight-only, static, dynamic, with or without output quantization | |
## Hugging Face Hub의 모델[[Models on Hugging Face Hub]]
Quark 네이티브 직렬화를 사용하는 공개 모델은 https://huggingface.co/models?other=quark 에서 찾을 수 있습니다.
Quark는 [`quant_method="fp8"`을 이용하는 모델](https://huggingface.co/models?other=fp8)과 [`quant_method="awq"`을 사용하는 모델](https://huggingface.co/models?other=awq)도 지원하지만, Transformers는 이러한 모델을 [AutoAWQ](https://huggingface.co/docs/transformers/quantization/awq)를 통해 불러오거나
[🤗 Transformers의 네이티브 fp8 지원](https://huggingface.co/docs/transformers/quantization/finegrained_fp8)을 사용합니다.
## Transformers에서 Quark모델 사용하기[[Using Quark models in Transformers]]
다음은 Transformers에서 Quark 모델을 불러오는 방법의 예시입니다:
```python
from transformers import AutoModelForCausalLM, AutoTokenizer
model_id = "EmbeddedLLM/Llama-3.1-8B-Instruct-w_fp8_per_channel_sym"
model = AutoModelForCausalLM.from_pretrained(model_id)
model = model.to("cuda")
print(model.model.layers[0].self_attn.q_proj)
# QParamsLinear(
# (weight_quantizer): ScaledRealQuantizer()
# (input_quantizer): ScaledRealQuantizer()
# (output_quantizer): ScaledRealQuantizer()
# )
tokenizer = AutoTokenizer.from_pretrained(model_id)
inp = tokenizer("Where is a good place to cycle around Tokyo?", return_tensors="pt")
inp = inp.to("cuda")
res = model.generate(**inp, min_new_tokens=50, max_new_tokens=100)
print(tokenizer.batch_decode(res)[0])
# <|begin_of_text|>Where is a good place to cycle around Tokyo? There are several places in Tokyo that are suitable for cycling, depending on your skill level and interests. Here are a few suggestions:
# 1. Yoyogi Park: This park is a popular spot for cycling and has a wide, flat path that's perfect for beginners. You can also visit the Meiji Shrine, a famous Shinto shrine located in the park.
# 2. Imperial Palace East Garden: This beautiful garden has a large, flat path that's perfect for cycling. You can also visit the
```